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Web API Basics

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This document discusses building web APIs with ASP.NET Web API. It covers the objectives of seeing how REST and web services can access data, building a first Web API service, using routing conventions, and modifying services for CRUD operations. The agenda includes explaining what Web API is, creating a first service, routing, and creating a service for CRUD. It also defines REST concepts like HTTP methods GET, POST, PUT, and DELETE and their typical uses for selecting, adding, editing, and deleting data.

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Web API Basics Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Objectives Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Objectives • See how REST and web services can be used to access data Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Objectives • See how REST and web services can be used to access data • Build your first Web API service Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Objectives • See how REST and web services can be used to access data • Build your first Web API service • Use Web API naming conventions for routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Objectives • See how REST and web services can be used to access data • Build your first Web API service • Use Web API naming conventions for routing • Modify your service for basic CRUD operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations • Filtering Data with Parameters Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
What Is ASP.NET Web API? Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
What Is ASP.NET Web API? • Next iteration of WCF REST Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
What Is ASP.NET Web API? • Next iteration of WCF REST • Incorporated into ASP.NET MVC 4 Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
What Is ASP.NET Web API? • Next iteration of WCF REST • Incorporated into ASP.NET MVC 4 • Framework for developing REST oriented services Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
REST Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
REST • Uses HTTP protocols Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
REST • Uses HTTP protocols • URLs and methods Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
REST • Uses HTTP protocols • URLs and methods • Accessible from a wide variety of clients Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
REST • Uses HTTP protocols • URLs and methods • Accessible from a wide variety of clients • HTTP methods: Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
REST • Uses HTTP protocols • URLs and methods • Accessible from a wide variety of clients • HTTP methods: • GET Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
REST • Uses HTTP protocols • URLs and methods • Accessible from a wide variety of clients • HTTP methods: • GET • POST Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
REST • Uses HTTP protocols • URLs and methods • Accessible from a wide variety of clients • HTTP methods: • GET • POST • PUT Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
GET Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
GET • Primarily just a URL making a simple request for a resource, e.g., a web page Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
GET • Primarily just a URL making a simple request for a resource, e.g., a web page • Response is sent back Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
GET • Primarily just a URL making a simple request for a resource, e.g., a web page • Response is sent back • Additional information is put in a query string Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
GET • Primarily just a URL making a simple request for a resource, e.g., a web page • Response is sent back • Additional information is put in a query string • Generally used to Select data Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
GET • Primarily just a URL making a simple request for a resource, e.g., a web page • Response is sent back • Additional information is put in a query string • Generally used to Select data • Selecting all: Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
GET • Primarily just a URL making a simple request for a resource, e.g., a web page • Response is sent back • Additional information is put in a query string • Generally used to Select data • Selecting all: http://www.root.com/products/ Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
GET • Primarily just a URL making a simple request for a resource, e.g., a web page • Response is sent back • Additional information is put in a query string • Generally used to Select data • Selecting all: http://www.root.com/products/ • Selecting one: Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
POST Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
POST • Sends collection of name-value pairs along with the request Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
POST • Sends collection of name-value pairs along with the request • Commonly used with forms on the web Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
POST • Sends collection of name-value pairs along with the request • Commonly used with forms on the web • Used to add new resources (Insert) Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
POST • Sends collection of name-value pairs along with the request • Commonly used with forms on the web • Used to add new resources (Insert) • Should return an appropriate HTTP success code Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
PUT Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
PUT • Used to store a resource at the supplied URL Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
PUT • Used to store a resource at the supplied URL • Generally used for Editing existing resources Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
DELETE Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
DELETE • Used for deleting resources Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
DELETE • Used for deleting resources • Should return an appropriate HTTP code Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations • Filtering Data with Parameters Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Create Your First Web API Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Create Your First Web API • Create a repository Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Create Your First Web API • Create a repository • Create an API controller to use the repository Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Create Your First Web API • Create a repository • Create an API controller to use the repository • Try it out in a browser Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations • Filtering Data with Parameters Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Web API Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Web API Routing • Interpretation of URLs by the server to decide what code should handle the request Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Web API Routing • Interpretation of URLs by the server to decide what code should handle the request • Operates similarly to ASP.NET MVC routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Web API Routing • Interpretation of URLs by the server to decide what code should handle the request • Operates similarly to ASP.NET MVC routing • Actions determined by HTTP method used Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Default Mapping Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Default Mapping • Configured in Global.asax Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Default Mapping • Configured in Global.asax • Uses “api” as URL segment Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Default Mapping • Configured in Global.asax • Uses “api” as URL segment • Adds word “Controller” to the controller part of URL Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Default Mapping • Configured in Global.asax • Uses “api” as URL segment • Adds word “Controller” to the controller part of URL • Looks for action that begins with the HTTP method Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Default Mapping • Configured in Global.asax • Uses “api” as URL segment • Adds word “Controller” to the controller part of URL • Looks for action that begins with the HTTP method • Additional URL parameters are mapped as action parameters Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Alternative Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Alternative Routing • Rarely necessary for most Web API services Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Alternative Routing • Rarely necessary for most Web API services • Several options to change URL routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
HTTP Method Attributes Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
HTTP Method Attributes • Very similar to ASP.NET MVC Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
HTTP Method Attributes • Very similar to ASP.NET MVC • Use attributes to bind HTTP methods to specific actions Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
HTTP Method Attributes • Very similar to ASP.NET MVC • Use attributes to bind HTTP methods to specific actions [HttpGet] Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
HTTP Method Attributes • Very similar to ASP.NET MVC • Use attributes to bind HTTP methods to specific actions [HttpGet] [HttpPost] Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
HTTP Method Attributes • Very similar to ASP.NET MVC • Use attributes to bind HTTP methods to specific actions [HttpGet] [HttpPost] [HttpPut] Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
HTTP Method Attributes • Very similar to ASP.NET MVC • Use attributes to bind HTTP methods to specific actions [HttpGet] [HttpPost] [HttpPut] [HttpDelete] Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
AcceptVerbs Attribute Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
AcceptVerbs Attribute • Also used on actions Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
AcceptVerbs Attribute • Also used on actions • Specify HTTP methods as strings Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
AcceptVerbs Attribute • Also used on actions • Specify HTTP methods as strings • Especially useful for atypical HTTP methods Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Action Names in the URL Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Action Names in the URL • Makes URLs route identically to ASP.NET MVC Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Action Names in the URL • Makes URLs route identically to ASP.NET MVC • Must change routeTemplate in Global.asax Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Action Names in the URL • Makes URLs route identically to ASP.NET MVC • Must change routeTemplate in Global.asax • Must also add HTTP method attributes to actions Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Removing Actions from Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Removing Actions from • Used when a resource’s URL would trigger an action, but this is not desired Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Removing Actions from • Used when a resource’s URL would trigger an action, but this is not desired • Use the NonAction attribute on the method Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations • Filtering Data with Parameters Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Create a Web API Service for CRUD Operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Create a Web API Service for CRUD Operations • Create – POST Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Create a Web API Service for CRUD Operations • Create – POST • Read – GET Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Create a Web API Service for CRUD Operations • Create – POST • Read – GET • Update – PUT Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Create a Web API Service for CRUD Operations • Create – POST • Read – GET • Update – PUT • Delete – DELETE Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Create a Web API Service for CRUD Operations • Create – POST • Read – GET • Update – PUT • Delete – DELETE • Basic functionality that most services will have Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Create a Web API Service for CRUD Operations • Create – POST • Read – GET • Update – PUT • Delete – DELETE • Basic functionality that most services will have • Try it out! Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations • Filtering Data with Parameters Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Filtering Data with Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Filtering Data with • Uses the OData protocol Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Filtering Data with • Uses the OData protocol • Special query strings can be used to: Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Filtering Data with • Uses the OData protocol • Special query strings can be used to: • Filter Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Filtering Data with • Uses the OData protocol • Special query strings can be used to: • Filter • Page Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Filtering Data with • Uses the OData protocol • Special query strings can be used to: • Filter • Page • Sort Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Filtering Data with • Uses the OData protocol • Special query strings can be used to: • Filter • Page • Sort • And more… Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Filter Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Filter • Condition that evaluates to true or false Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Filter • Condition that evaluates to true or false • Uses OData-specific keywords Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Filter • Condition that evaluates to true or false • Uses OData-specific keywords • Must be sendable in a URL Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Order By Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Order By • Specifies the sort order of returned data Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Order By • Specifies the sort order of returned data • Can sort by multiple properties Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Order By • Specifies the sort order of returned data • Can sort by multiple properties • Can specify ASC and DESC sorting Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Paging Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Paging • Done by using $skip and $top Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Paging • Done by using $skip and $top • $skip passes over a number of records Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Paging • Done by using $skip and $top • $skip passes over a number of records • $skip should be set to: page number * page size Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Paging • Done by using $skip and $top • $skip passes over a number of records • $skip should be set to: page number * page size • $top selects a certain number to return Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Paging • Done by using $skip and $top • $skip passes over a number of records • $skip should be set to: page number * page size • $top selects a certain number to return • $top should be set to page size Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
There’s More Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
There’s More • There are other OData query strings Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
There’s More • There are other OData query strings • Other query keywords for $filter Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
There’s More • There are other OData query strings • Other query keywords for $filter • www.odata.org Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Learn More! Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
Learn More! • This is an excerpt from a larger course. Visit www.learnnowonline.com for the full details! Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company

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Web API Basics

  • 1. Web API Basics Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 2. Objectives Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 3. Objectives • See how REST and web services can be used to access data Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 4. Objectives • See how REST and web services can be used to access data • Build your first Web API service Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 5. Objectives • See how REST and web services can be used to access data • Build your first Web API service • Use Web API naming conventions for routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 6. Objectives • See how REST and web services can be used to access data • Build your first Web API service • Use Web API naming conventions for routing • Modify your service for basic CRUD operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 7. Agenda Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 8. Agenda • What Is ASP.NET Web API? Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 9. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 10. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 11. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 12. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations • Filtering Data with Parameters Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 13. What Is ASP.NET Web API? Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 14. What Is ASP.NET Web API? • Next iteration of WCF REST Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 15. What Is ASP.NET Web API? • Next iteration of WCF REST • Incorporated into ASP.NET MVC 4 Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 16. What Is ASP.NET Web API? • Next iteration of WCF REST • Incorporated into ASP.NET MVC 4 • Framework for developing REST oriented services Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 17. REST Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 18. REST • Uses HTTP protocols Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 19. REST • Uses HTTP protocols • URLs and methods Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 20. REST • Uses HTTP protocols • URLs and methods • Accessible from a wide variety of clients Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 21. REST • Uses HTTP protocols • URLs and methods • Accessible from a wide variety of clients • HTTP methods: Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 22. REST • Uses HTTP protocols • URLs and methods • Accessible from a wide variety of clients • HTTP methods: • GET Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 23. REST • Uses HTTP protocols • URLs and methods • Accessible from a wide variety of clients • HTTP methods: • GET • POST Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 24. REST • Uses HTTP protocols • URLs and methods • Accessible from a wide variety of clients • HTTP methods: • GET • POST • PUT Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 25. GET Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 26. GET • Primarily just a URL making a simple request for a resource, e.g., a web page Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 27. GET • Primarily just a URL making a simple request for a resource, e.g., a web page • Response is sent back Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 28. GET • Primarily just a URL making a simple request for a resource, e.g., a web page • Response is sent back • Additional information is put in a query string Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 29. GET • Primarily just a URL making a simple request for a resource, e.g., a web page • Response is sent back • Additional information is put in a query string • Generally used to Select data Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 30. GET • Primarily just a URL making a simple request for a resource, e.g., a web page • Response is sent back • Additional information is put in a query string • Generally used to Select data • Selecting all: Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 31. GET • Primarily just a URL making a simple request for a resource, e.g., a web page • Response is sent back • Additional information is put in a query string • Generally used to Select data • Selecting all: http://www.root.com/products/ Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 32. GET • Primarily just a URL making a simple request for a resource, e.g., a web page • Response is sent back • Additional information is put in a query string • Generally used to Select data • Selecting all: http://www.root.com/products/ • Selecting one: Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 33. POST Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 34. POST • Sends collection of name-value pairs along with the request Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 35. POST • Sends collection of name-value pairs along with the request • Commonly used with forms on the web Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 36. POST • Sends collection of name-value pairs along with the request • Commonly used with forms on the web • Used to add new resources (Insert) Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 37. POST • Sends collection of name-value pairs along with the request • Commonly used with forms on the web • Used to add new resources (Insert) • Should return an appropriate HTTP success code Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 38. PUT Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 39. PUT • Used to store a resource at the supplied URL Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 40. PUT • Used to store a resource at the supplied URL • Generally used for Editing existing resources Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 41. DELETE Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 42. DELETE • Used for deleting resources Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 43. DELETE • Used for deleting resources • Should return an appropriate HTTP code Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 44. Agenda Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 45. Agenda • What Is ASP.NET Web API? Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 46. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 47. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 48. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 49. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations • Filtering Data with Parameters Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 50. Create Your First Web API Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 51. Create Your First Web API • Create a repository Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 52. Create Your First Web API • Create a repository • Create an API controller to use the repository Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 53. Create Your First Web API • Create a repository • Create an API controller to use the repository • Try it out in a browser Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 54. Agenda Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 55. Agenda • What Is ASP.NET Web API? Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 56. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 57. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 58. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 59. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations • Filtering Data with Parameters Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 60. Web API Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 61. Web API Routing • Interpretation of URLs by the server to decide what code should handle the request Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 62. Web API Routing • Interpretation of URLs by the server to decide what code should handle the request • Operates similarly to ASP.NET MVC routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 63. Web API Routing • Interpretation of URLs by the server to decide what code should handle the request • Operates similarly to ASP.NET MVC routing • Actions determined by HTTP method used Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 64. Default Mapping Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 65. Default Mapping • Configured in Global.asax Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 66. Default Mapping • Configured in Global.asax • Uses “api” as URL segment Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 67. Default Mapping • Configured in Global.asax • Uses “api” as URL segment • Adds word “Controller” to the controller part of URL Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 68. Default Mapping • Configured in Global.asax • Uses “api” as URL segment • Adds word “Controller” to the controller part of URL • Looks for action that begins with the HTTP method Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 69. Default Mapping • Configured in Global.asax • Uses “api” as URL segment • Adds word “Controller” to the controller part of URL • Looks for action that begins with the HTTP method • Additional URL parameters are mapped as action parameters Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 70. Alternative Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 71. Alternative Routing • Rarely necessary for most Web API services Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 72. Alternative Routing • Rarely necessary for most Web API services • Several options to change URL routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 73. HTTP Method Attributes Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 74. HTTP Method Attributes • Very similar to ASP.NET MVC Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 75. HTTP Method Attributes • Very similar to ASP.NET MVC • Use attributes to bind HTTP methods to specific actions Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 76. HTTP Method Attributes • Very similar to ASP.NET MVC • Use attributes to bind HTTP methods to specific actions [HttpGet] Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 77. HTTP Method Attributes • Very similar to ASP.NET MVC • Use attributes to bind HTTP methods to specific actions [HttpGet] [HttpPost] Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 78. HTTP Method Attributes • Very similar to ASP.NET MVC • Use attributes to bind HTTP methods to specific actions [HttpGet] [HttpPost] [HttpPut] Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 79. HTTP Method Attributes • Very similar to ASP.NET MVC • Use attributes to bind HTTP methods to specific actions [HttpGet] [HttpPost] [HttpPut] [HttpDelete] Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 80. AcceptVerbs Attribute Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 81. AcceptVerbs Attribute • Also used on actions Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 82. AcceptVerbs Attribute • Also used on actions • Specify HTTP methods as strings Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 83. AcceptVerbs Attribute • Also used on actions • Specify HTTP methods as strings • Especially useful for atypical HTTP methods Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 84. Action Names in the URL Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 85. Action Names in the URL • Makes URLs route identically to ASP.NET MVC Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 86. Action Names in the URL • Makes URLs route identically to ASP.NET MVC • Must change routeTemplate in Global.asax Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 87. Action Names in the URL • Makes URLs route identically to ASP.NET MVC • Must change routeTemplate in Global.asax • Must also add HTTP method attributes to actions Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 88. Removing Actions from Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 89. Removing Actions from • Used when a resource’s URL would trigger an action, but this is not desired Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 90. Removing Actions from • Used when a resource’s URL would trigger an action, but this is not desired • Use the NonAction attribute on the method Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 91. Agenda Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 92. Agenda • What Is ASP.NET Web API? Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 93. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 94. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 95. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 96. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations • Filtering Data with Parameters Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 97. Create a Web API Service for CRUD Operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 98. Create a Web API Service for CRUD Operations • Create – POST Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 99. Create a Web API Service for CRUD Operations • Create – POST • Read – GET Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 100. Create a Web API Service for CRUD Operations • Create – POST • Read – GET • Update – PUT Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 101. Create a Web API Service for CRUD Operations • Create – POST • Read – GET • Update – PUT • Delete – DELETE Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 102. Create a Web API Service for CRUD Operations • Create – POST • Read – GET • Update – PUT • Delete – DELETE • Basic functionality that most services will have Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 103. Create a Web API Service for CRUD Operations • Create – POST • Read – GET • Update – PUT • Delete – DELETE • Basic functionality that most services will have • Try it out! Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 104. Agenda Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 105. Agenda • What Is ASP.NET Web API? Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 106. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 107. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 108. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 109. Agenda • What Is ASP.NET Web API? • Create Your First Web API Service • Web API Routing • Create a Web API Service for CRUD Operations • Filtering Data with Parameters Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 110. Filtering Data with Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 111. Filtering Data with • Uses the OData protocol Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 112. Filtering Data with • Uses the OData protocol • Special query strings can be used to: Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 113. Filtering Data with • Uses the OData protocol • Special query strings can be used to: • Filter Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 114. Filtering Data with • Uses the OData protocol • Special query strings can be used to: • Filter • Page Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 115. Filtering Data with • Uses the OData protocol • Special query strings can be used to: • Filter • Page • Sort Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 116. Filtering Data with • Uses the OData protocol • Special query strings can be used to: • Filter • Page • Sort • And more… Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 117. Filter Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 118. Filter • Condition that evaluates to true or false Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 119. Filter • Condition that evaluates to true or false • Uses OData-specific keywords Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 120. Filter • Condition that evaluates to true or false • Uses OData-specific keywords • Must be sendable in a URL Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 121. Order By Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 122. Order By • Specifies the sort order of returned data Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 123. Order By • Specifies the sort order of returned data • Can sort by multiple properties Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 124. Order By • Specifies the sort order of returned data • Can sort by multiple properties • Can specify ASC and DESC sorting Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 125. Paging Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 126. Paging • Done by using $skip and $top Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 127. Paging • Done by using $skip and $top • $skip passes over a number of records Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 128. Paging • Done by using $skip and $top • $skip passes over a number of records • $skip should be set to: page number * page size Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 129. Paging • Done by using $skip and $top • $skip passes over a number of records • $skip should be set to: page number * page size • $top selects a certain number to return Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 130. Paging • Done by using $skip and $top • $skip passes over a number of records • $skip should be set to: page number * page size • $top selects a certain number to return • $top should be set to page size Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 131. There’s More Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 132. There’s More • There are other OData query strings Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 133. There’s More • There are other OData query strings • Other query keywords for $filter Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 134. There’s More • There are other OData query strings • Other query keywords for $filter • www.odata.org Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 135. Learn More! Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company
  • 136. Learn More! • This is an excerpt from a larger course. Visit www.learnnowonline.com for the full details! Learn More @ http://www.learnnowonline.com Copyright © by Application Developers Training Company

Editor's Notes