在设计时修改资源，在WPF项目中添加代码

Question

What I'm trying to do right now: Modify the Expression Blend UI / Visual Studio, to add a button on one of my dependency properties, and when I click on it, it creates a new trigger.

What is working : I created the button, it appears in the UI, that's fine.

What is not working : I cannot modify the Resource to add a trigger (if I step in, it works but it does not modify on the global resource, only on the instance I think).

I have my main project in Visual Studio, and a property with a button like this:

When the button is pressed this is what happens:

• I get my Control that contains that dependency property (Ok).
• I searched for the Resource file that contains the Resource I want to modify (Ok).
• I update the Resource, but it does not replace the Resource on disk.

I think that it's because I only modify it on memory, so it's in the "air"

I don't know where to go now... I need help

The code behind where I modify the Resource is in an other DLL, the MyLibrary. Design .cs

I'm using Visual Studio 2010 / Blend 4 / .NET 4.0

Answer 1

That's one splution I can figure at the moment, but unfortunately I'm not able to test it now. Still you can check if it works for you.

You can have a class, say ResourceContainer.cs , and collect your control in it as a public static value, and let your control be a button:

   public static Button MyButton;

Then you can use it in your code-behind: If your window is MainWindow.xaml , and, say you need your particular control in a grid, then you probably have something like:

<Window x:Class=...
        ...(namespace stuff)...
        Title="MainWindow" ...(size stuff)...>

    <Grid x:Name="MyGrid">
    ...(your code here)...      
    </Grid>
    ...
</Window>

Then in MainWindow.xaml.cs you can use ResourceContainer.cs like this:

...
ResourceContainer rc;

...

MyGrid.Resources.Add("MyKey", rc.MyButton);

...

(when you need it)
rc.MyButton.Triggers.Add(TriggerBase item);
...