Programming Without Coding Technology (PWCT) - Error Handling (Try/Catch)
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This document discusses using error handling (Try/Catch) components in a steps tree. It provides instructions on how to add components to generate steps using either the mouse or keyboard shortcuts. Examples are given of adding assignment, error handling, print text, and wait components to a steps tree. The final steps tree contains steps to divide a number by zero, trigger an error, print an error message, and wait before ending.
Programming Without Coding Technology (PWCT) - Error Handling (Try/Catch)
- 1. PWCT 1.9 Art Documentation ( http://doublesvsoop.sourceforge.net ) 2006-2013, Mahmoud Fayed ( [email protected] ) _____________________________________________________________________________________ Table of contents 1 - Introduction 2 - Implementation steps 3 - Final Steps Tree 4 - Application during the runtime 1 - Introduction In this lesson we are going to learn how to use the Error Handling (Try/Catch) component. 2 - Implementation Steps Fig. (1) Goal Desginer - Steps Tree Select the step (The First Step) We will start now new interaction process to generate new steps to our steps tree. The slow way (Using Mouse): 1 - Click Interact to open the components browser 2 - Select the domain (Variables) 3 - Select the component (Assignment) The fast way (Using Keyboard shortcuts): 1 - Get the component using its name by typing (Assignment) Note : Stop typing when you see the required component is selected
- 2. Fig. (2) Component Browser – Select the component (Assignment) After selecting the component click Ok or press ENTER Fig. (3) Interaction page - Set the properties and enter the required data as in the image above Afer entering data , Click OK or press CTRL+W
- 3. Fig. (4) Goal Desginer - Steps Tree Select the step (The First Step) We will start now new interaction process to generate new steps to our steps tree. The slow way (Using Mouse): 1 - Click Interact to open the components browser 2 - Select the domain (Variables) 3 - Select the component (Assignment) The fast way (Using Keyboard shortcuts): 1 - Get the component using its name by typing (Assignment) Note : Stop typing when you see the required component is selected Fig. (5) Component Browser – Select the component (Assignment) After selecting the component click Ok or press ENTER
- 4. Fig. (6) Interaction page - Set the properties and enter the required data as in the image above Afer entering data , Click OK or press CTRL+W Fig. (7) Goal Desginer - Steps Tree Select the step (The First Step) We will start now new interaction process to generate new steps to our steps tree. The slow way (Using Mouse): 1 - Click Interact to open the components browser 2 - Select the domain (Control Structure) 3 - Select the component (Error Handling (Try - Catch )) The fast way (Using Keyboard shortcuts): 1 - Get the component using its name by typing (Error Handling (Try - Catch )) Note : Stop typing when you see the required component is selected
- 5. Fig. (8) Component Browser – Select the component (Error Handling (Try - Catch )) After selecting the component click Ok or press ENTER Fig. (9) Interaction page - Set the properties and enter the required data as in the image above Afer entering data , Click OK or press CTRL+W
- 6. Fig. (10) Goal Desginer - Steps Tree Select the step (Start Here) We will start now new interaction process to generate new steps to our steps tree. The slow way (Using Mouse): 1 - Click Interact to open the components browser 2 - Select the domain (Print Text) 3 - Select the component (Print Text To Console) The fast way (Using Keyboard shortcuts): 1 - Get the component using its name by typing (Print Text To Console) Note : Stop typing when you see the required component is selected Fig. (11) Component Browser – Select the component (Print Text To Console) After selecting the component click Ok or press ENTER
- 7. Fig. (12) Interaction page - Set the properties and enter the required data as in the image above Afer entering data , Click OK or press CTRL+W Fig. (13) Goal Desginer - Steps Tree Select the step (Start Here) We will start now new interaction process to generate new steps to our steps tree. The slow way (Using Mouse): 1 - Click Interact to open the components browser 2 - Select the domain (Print Text) 3 - Select the component (Print Text To Console) The fast way (Using Keyboard shortcuts): 1 - Get the component using its name by typing (Print Text To Console) Note : Stop typing when you see the required component is selected
- 8. Fig. (14) Component Browser – Select the component (Print Text To Console) After selecting the component click Ok or press ENTER Fig. (15) Interaction page - Set the properties and enter the required data as in the image above Afer entering data , Click OK or press CTRL+W
- 9. Fig. (16) Goal Desginer - Steps Tree Select the step (The First Step) We will start now new interaction process to generate new steps to our steps tree. The slow way (Using Mouse): 1 - Click Interact to open the components browser 2 - Select the domain (Console Application) 3 - Select the component (Wait (Key/Seconds)) The fast way (Using Keyboard shortcuts): 1 - Get the component using its name by typing (Wait (Key/Seconds)) Note : Stop typing when you see the required component is selected Fig. (17) Component Browser – Select the component (Wait (Key/Seconds)) After selecting the component click Ok or press ENTER
- 10. Fig. (18) Interaction page - Set the properties and enter the required data as in the image above Afer entering data , Click OK or press CTRL+W Fig. (19) Goal Desginer - Final Steps Tree 3 - Final Steps Tree The First Step v1 = 5 v2 = 0 Error Handling, Try Start Here Print text (v1 / v2) to console Catch Start Here Print text ("Oh no, it's error !!!") to console End Try WAIT ( 3 SECONDS)
- 11. 4 - Application during the runtime Fig. (20) Application during the runtime