The bitmap image associated with the ToolboxBitmap property does not appear in the toolbox.

[Perpete]

Description

When creating a custom control, if you use the ToolboxBitmap property, the bitmap image associated with this attribute does not appear in the toolbox.
For the program test, the bitmap image is included in a folder.
I also tested with the image included in a resource file.
The problem remains the same.

The same test with a winforms project works perfectly.

Here is the code
'----------------------------------
Imports System.Drawing
Imports System.Windows.Controls.Primitives

<ToolboxBitmap("D:\Documents\Visual Studio 2022\Projects\WpfApp1\Images\ToggleButton.bmp")>
Public Class CustomControl1
Inherits System.Windows.Controls.Control

Shared Sub New()
    'Cet appel OverrideMetadata indique au système que cet élément souhaite apporter un style différent de celui de sa classe de base.
    'Ce style est défini dans themes\generic.xaml
    DefaultStyleKeyProperty.OverrideMetadata(GetType(CustomControl1), New FrameworkPropertyMetadata(GetType(CustomControl1)))
End Sub

End Class
'---------------------------

Here is the image of the ToolboxBitmap attribute.

You see the image not present in the toolbox.

With the same project in winforms, the image is visible.

`---------------------------------------
<ToolboxBitmap("D:\Documents\Visual Studio 2022\Projects\WinFormsApp1\Images\ToggleButton.bmp")>
Public Class CustomControl1

Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
    MyBase.OnPaint(e)

    'Ajoutez ici votre code de dessin personnalisé
End Sub

End Class
`--------------------------------------

Reproduction Steps

Create a project with a custom control.
Added the ToolboxBitmap attribute whose value is a path to a bitmap file to the custom control.
Build the project.

Expected behavior

View of the ToolboxBitmap attribute image in the toolbar.

Actual behavior

No view of ToolboxBitmap attribute image in toolbar.

Regression?

No response

Known Workarounds

No response

Impact

No response

Configuration

Visual studio 2022 Version 17.12.1
.Net 9
Project in VB.

Other information

No response

[miloush]

This sounds rather Visual Studio related rather than WPF. Please include the repro projects.

[Perpete]

Here is the project in WPF and winforms.
You have to adapt the image file path for the toolboxBitmap attribute depending on where the Images folder of the project is located.

WinFormsApp1.zip
WpfApp1.zip

[himgoyalmicro]

Thanks @miloush
@Perpete Can you please raise this bug with the VS Feedback (https://developercommunity.visualstudio.com)?

[Perpete]

Thank you.
Problem transferred.

[miloush]

(What I was gonna check is whether the bitmap file has the same build action in both projects.)