Extra ToolStripContainer Tasks dialog pops up when running the DemoConsole application

[Liv-Goh]

.NET version

Branch Issue_12830_Multi-Target_DemoConsole from Ricardo WinForms Repo

Did it work in .NET Framework?

Yes

Did it work in any of the earlier releases of .NET Core or .NET 5+?

Yes

Issue description

Current Behavior (.NET Framework 4.8.1)
Extra ToolStripContainer Tasks dialog pops up when running the DemoConsole application

bandicam.2025-04-04.09-50-10-679.mp4

Expected Behavior (.NET 10)
No extra ToolStripContainer Tasks dialog pops up when running the DemoConsole application

bandicam.2025-04-04.10-08-02-737.mp4

Steps to reproduce

Test the sample app: DemoConsole in Ricardo WinForms Repo Issue_12830_Multi-Target_DemoConsole branch

More Info

This bug is created to resolve before #12996 is merged

[ricardobossan]

@Tanya-Solyanik

Conclusions from the investigation so far:

• Moving the window around hides the extra ToolStripContainer Tasks Dialog window.
• Deleting all instances of ToolStripContainer from the MainForm causes other designer actions to pop up instead, such as DataGridView.
• Setting DesignerOptions.ObjectBoundSmartTagAutoShow does not change the outcome.

[Tanya-Solyanik]

Are you sure you experimented with the right AutoSHow property -

winforms/src/System.Windows.Forms.Design/src/System/ComponentModel/Design/DesignerActionList.cs

Line 18 in fcd22a4

public virtual bool AutoShow { get; set; }

[ricardobossan]

@Tanya-Solyanik I tried implementing your suggestion in this commit, but the issue's behavior remains unchanged. I also tested it without wrapping the code in #if NETFRAMEWORK, just in case.

Is there anything I might be overlooking?

[LeafShi1]

The call stack in Net481:

>	System.Design.dll!System.Windows.Forms.Design.Behavior.DesignerActionBehavior.ShowUI(System.Windows.Forms.Design.Behavior.Glyph g) Line 71	C#
 	System.Design.dll!System.Windows.Forms.Design.DesignerActionUI.OnDesignerActionUIStateChange(object sender, System.ComponentModel.Design.DesignerActionUIStateChangeEventArgs e) Line 343	C#
 	System.Design.dll!System.ComponentModel.Design.DesignerActionUIService.OnDesignerActionUIStateChange(System.ComponentModel.Design.DesignerActionUIStateChangeEventArgs e) Line 71	C#
 	System.Design.dll!System.ComponentModel.Design.DesignerActionUIService.ShowUI(System.ComponentModel.IComponent component) Line 57	C#
 	System.Design.dll!System.ComponentModel.Design.ComponentDesigner.InitializeNewComponent(System.Collections.IDictionary defaultValues) Line 544	C#
 	System.Design.dll!System.Windows.Forms.Design.ControlDesigner.InitializeNewComponent(System.Collections.IDictionary defaultValues) Line 1814	C#
 	System.Design.dll!System.Windows.Forms.Design.ParentControlDesigner.InitializeNewComponent(System.Collections.IDictionary defaultValues) Line 969	C#
 	System.Design.dll!System.Windows.Forms.Design.TableLayoutPanelDesigner.InitializeNewComponent(System.Collections.IDictionary defaultValues) Line 1133	C#
 	DesignSurfaceExt.dll!DesignSurfaceExt.DesignSurfaceExt.CreateComponent<System.Windows.Forms.TableLayoutPanel>(out System.ComponentModel.Design.IDesignerHost host) Line 216	C#
 	DesignSurfaceExt.dll!DesignSurfaceExt.DesignSurfaceExt.CreateControl<System.Windows.Forms.TableLayoutPanel>(System.Drawing.Size controlSize, System.Drawing.Point controlLocation) Line 160	C#
 	DesignSurface.exe!TestConsole.MainForm.CreateDesignSurface(int n) Line 269	C#
 	DesignSurface.exe!TestConsole.MainForm.InitFormDesigner() Line 24	C#
 	DesignSurface.exe!TestConsole.MainForm.MainForm_Load(object sender, System.EventArgs e) Line 504	C#
 	System.Windows.Forms.dll!System.Windows.Forms.Form.OnLoad(System.EventArgs e) Line 4370	C#
 	System.Windows.Forms.dll!System.Windows.Forms.Form.OnCreateControl() Line 4241	C#
 	System.Windows.Forms.dll!System.Windows.Forms.Control.CreateControl(bool fIgnoreVisible)	C#
 	System.Windows.Forms.dll!System.Windows.Forms.Control.CreateControl()	C#
 	System.Windows.Forms.dll!System.Windows.Forms.Control.WmShowWindow(ref System.Windows.Forms.Message m)	C#
 	System.Windows.Forms.dll!System.Windows.Forms.Control.WndProc(ref System.Windows.Forms.Message m)	C#
 	System.Windows.Forms.dll!System.Windows.Forms.Form.WmShowWindow(ref System.Windows.Forms.Message m) Line 6374	C#
 	System.Windows.Forms.dll!System.Windows.Forms.NativeWindow.DebuggableCallback(System.IntPtr hWnd, int msg, System.IntPtr wparam, System.IntPtr lparam) Line 742	C#
 	[Native to Managed Transition]	
 	[Managed to Native Transition]	
 	System.Windows.Forms.dll!System.Windows.Forms.Control.SetVisibleCore(bool value)	C#
 	System.Windows.Forms.dll!System.Windows.Forms.Form.SetVisibleCore(bool value) Line 2998	C#
 	System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(int reason, System.Windows.Forms.ApplicationContext context) Line 1232	C#
 	System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoop(int reason, System.Windows.Forms.ApplicationContext context) Line 1152	C#
 	System.Windows.Forms.dll!System.Windows.Forms.Form.ShowDialog(System.Windows.Forms.IWin32Window owner) Line 5471	C#
 	DesignSurface.exe!TestConsole.Program.Main() Line 29	C#

[Tanya-Solyanik]

I see, there is no DesignerHost service available when component is initialized on NETFX - see with VPN enabled. Please compare this stack to what is happening on .NET.

[LeafShi1]

When porting ComponentDesigner to Winform Runtime repo in PR #552, the logic related to ShowUI in the InitializeNewComponent method was deleted, resulting in this problem not occurring on .net.

The code in .Net:

The code in .Net Framework:

• DesignerHost is not null, but DesignerHost is false