Cannot set ImageSource using pack URI

Question

I am trying to set an image source using the pack uri like this:

<Setter.Value>
    <ImageBrush ImageSource="pack://application:,,,/Resources/grid_bg.png"/>
</Setter.Value>

with a Resources.resx file like this:

with the image in it like this:

but the error I get is this:

I have also attempted this:

Pack URI and path not resolving image in WPF

and this:

At design time pack uri is valid, but not at runtime?

and this:

http://csharpsimplified.wordpress.com/2009/02/16/resources-in-wpf-i-binary-resources/

while still getting the same error as above. Somebody, please, for the love of zeus, liberate me from this menial, frustrating garbage and I will return the favor with praise and points.

Answer 1

In a WPF project you usually do not add image files as resources to Resource.resx. Instead you just put them into a folder in your project and set their Build Action to Resource, as shown below.

It is also not necessary to write the Pack URI prefix. You can just write it like this:

<ImageBrush ImageSource="Resources/grid_bg.png"/>

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Please note that if you add images to Resource.resx, Visual Studio generates a Resources class with static properties for each image. These properties are of type System.Drawing.Bitmap, which is WinForms, not WPF.