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CustomActionData EntryPoint
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Lesson 2: Creating Setup Projects for Deployment
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Table 15-1 Properties of Custom Actions
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Property InstallerClass
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Description A Boolean value that represents whether your custom action is implemented in an Installer class. This property must be true if the custom action is implemented in an Installer and false if it is not. Contains the actual path on the developer s computer to the file that implements the custom action. This property is read-only.
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To create a custom action
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1. Write, test, and debug the code for the custom action you want to add to your setup project. 2. Add an Installer class to the solution you want to deploy. 3. Add the code written in step 1 to the appropriate overridden method (e.g., Install, Rollback, Commit, or Uninstall) of the Installer class. 4. From the View menu, choose Editors, Custom Actions Editor. 5. Right-click the installation event that you want to associate with your custom action and choose Add Custom Action. The Select Item In Project window opens. 6. Browse to the file that implements your custom action and select it. 7. In the Properties window, configure the properties of the custom action.
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Although most errors in deployment are handled by Windows Installer, you must write error-handling code to trap errors in custom actions. Because custom actions are executed code, errors that occur and are not handled can cause unexpected results on installation. Use Try Catch blocks to catch and correct any errors that can be cor rected. If an error occurs that cannot be corrected, such as a missing file, throw a new InstallException. Throwing an InstallException will cause the installation to be rolled back without leaving any lasting effect on the system. The following example demon strates how to test for the existence of a file and throw a new InstallException if the file is not found.
' VB Dim myInfo As New System.IO.FileInfo("aFile.txt")
If Not myInfo.Exists Then
15
Deployment
Throw New System.Configuration.Install.InstallException("File not found") End If // C# System.IO.FileInfo myInfo = new System.IO.FileInfo("aFile.txt"); if(!(myInfo.Exists)) throw new System.Configuration.Install.InstallException("File not found");
Quick Check
1. How can you associate an icon with an application 2. How can you roll back installation of a setup project in a custom action
Quick Check Answers
A. You can associate an icon with your application by creating a shortcut in the File System Editor and then setting the shortcut s Icon property to the icon you want to associate with your application. The icon will be automat ically added as the shortcut. B. By throwing an InstallException. Custom actions that encounter unrecover able errors should throw InstallException to roll back the installation and prevent harm to the system.
Lab: Create a Setup Project
In this lab, you will create a setup project for the same application that you installed in Lesson 1, Deploying Applications with ClickOnce. You will use the File System Editor to install files to different directories and create a custom action that displays a message box at install time.
Exercise 1: Use the File System Editor and Create a Custom Action
1. From the Code folder on the companion CD, open the partial solution for Chap ter 15. 2. From the File menu, choose Add and then choose New Project. The Add New Project dialog box opens. 3. Expand Other Project Types, select Setup and Deployment, and then select Setup Project. Click OK. The Setup Project opens to the File System Editor. 4. In the File System Editor, right-click Application Folder, choose Add, and then choose Project Output.
Lesson 2: Creating Setup Projects for Deployment
5. In the File System Editor, right-click the left-hand pane, choose Add Special Folder, and then choose Custom Folder to add a custom folder. 6. In the Add Project Output Group dialog box, select your project and choose Pri mary Output. Click OK. 7. In the File System Editor, select Custom Folder #1. In the Properties window, set the DefaultLocation property to C:\. 8. In the File System Editor, right-click Custom Folder #1, choose Add, and then choose File. Browse to the folder that contains your partial solution and select myFile.txt. Click Open. 9. In Solution Explorer, select your application project (15BothLabsVB Partial or 15BothLabsCSPartial). 10. From the Project menu, choose Add New Item. In the Add New Item dialog box, select Installer Class. Then click Add. 11. In the Code Editor, add the following code to override the Install method of the Installer class.
' VB Public Overrides Sub Install(ByVal stateSaver As System.Collections.IDictionary) MyBase.Install(stateSaver) MsgBox("Install custom action executed") End Sub // C#
public override void Install(System.Collections.IDictionary stateSaver)
base.Install(stateSaver);
System.Windows.Forms.MessageBox.Show("Install custom action executed");
12. In Solution Explorer, right-click Installer1 and select View Code to open the Code Editor. 13. In Solution Explorer, right-click Setup1, choose View, and then choose Custom Actions. 14. In the Custom Actions Editor, right-click Install and choose Add Custom Action to open the Select Item In Project dialog box. 15. In the Select Item In Project dialog box, double-click Application Folder and select Primary Output from [application], where [application] is the project that contains your Installer class.
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