Unable to get a Custom Component to show in tool box .Net 5

Question

Unable to get a Custom Component to show in tool box .Net 5

Andy 1

For example, UserControl1 : ComboBox , a custom ComboxBox will show.

But, Component1 : Component will not show.

I've tried NuGet packages, still only the "controls" populate, not Components. The ToolBoxItem(true) doesn't work either.

How is this accomplished?

Lex Li (Microsoft) 6,032 Reputation points Microsoft Employee

2021-07-10T00:35:58.587+00:00

WinForms? Everything is still in preview, so have to be patient. More information can be found on GitHub
Andy 1 Reputation point

2021-07-10T15:32:42.117+00:00
Well, the link is just using .Net Framework on the forms. Not really what I'm trying to accomplish.

If I can see a Component in .Net 5 toolbox like an ErrorProvider, I should be able to do it for my components. But I'm unable to do so.

Example:
{ [ToolboxItem(true)]

public partial class Component1 : ErrorProvider {

This shows in the toolbox.

public partial class Component2: Component does not, or any custom component I've made

So, it is possible, but how?
Daniel Zhang-MSFT 9,646 Reputation points

2021-07-16T07:17:54.537+00:00

Hi anonymous user-8783,
May I know if you have got any chance to check my answer? I am glad to help if you have any other questions.
Best Regards,
Daniel Zhang

1 answer

Your answer

Lex Li (Microsoft) 6,032 Reputation points Microsoft Employee

2021-07-10T00:35:58.587+00:00

WinForms? Everything is still in preview, so have to be patient. More information can be found on GitHub
Andy 1 Reputation point

2021-07-10T15:32:42.117+00:00

Well, the link is just using .Net Framework on the forms. Not really what I'm trying to accomplish.

If I can see a Component in .Net 5 toolbox like an ErrorProvider, I should be able to do it for my components. But I'm unable to do so.

Example:
{ [ToolboxItem(true)]

public partial class Component1 : ErrorProvider {

This shows in the toolbox.

public partial class Component2: Component does not, or any custom component I've made

So, it is possible, but how?
Daniel Zhang-MSFT 9,646 Reputation points

2021-07-16T07:17:54.537+00:00

Hi anonymous user-8783,
May I know if you have got any chance to check my answer? I am glad to help if you have any other questions.
Best Regards,
Daniel Zhang

Answer 1

Hi Andy-8783,
>>If I can see a Component in .Net 5 toolbox like an ErrorProvider,
You can find the ErrorProvider under Toolbox->Components tab.

And as lextm said that the WinForms designer in .NET Core is still in its preview and currently some features are not yet supported.
I suggest you use the “Send Feedback” icon in Visual Studio top-right corner as shown in the following image and specify that it is related to the “WinForms .NET Core” area.
More details please refer to this document.
Best Regards,
Daniel Zhang

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Unable to get a Custom Component to show in tool box .Net 5

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