How to pass parameters to the custom action?

Question

I\'m trying to create a custom action with \"Value\" attribute, I want to pass parameters to the C# code (the TARGETDIR and the version).

However, I get an error sta

Answer 1

Note, you're using Value attribute in the wrong way:

...this attribute must be used with the Property attribute to set the property...^Source

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Based on the Creating WiX Custom Actions in C# and Passing Parameters article you should:

1. Create properties with desired values:

2. Create custom action to set the InstallDir property:

3. Create custom action:

4. Schedule custom actions for execution during installation process:

   
       
       
       ...
   
   

5. Access those properties from your custom action as follows:

   [CustomAction]
   public static ActionResult YourCustomAction(Session session)
   {
       // session["InstallDir"]
       // session["Version"]
   }