How to get a CompositeControl's tag-element child controls at design-time

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I am designing an ASP.NET v3.5 custom control based on CompositeControl.

However, I do NOT want to create my child controls via code, but rather as embedded HTML tag elements within the CompositeControl in the ASPX page, such as:

<cc:MyCompositeControl ID="MyControl"> 
    <asp:Label>Cat</asp:Label> 
    <asp:Label>Cat</asp:Label> 
</cc:MyCompositeControl>

At run time, MyControl.Controls contains the two labels as expected.

At design time, MyControl.Controls is empty.

I need this information at design time for various reasons.

What am I doing wrong?

Posted 23-Jun-10 9:40am

Meron LAVIE

Updated 23-Jun-10 22:05pm

Sandeep Mewara

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Sandeep Mewara · Answer 1 · 2010-06-23T22:07:00

Solution 1

Well you need to override GetDesignTimeHtml method. Create a designer class for your control and override it.

Have a look at this article. This has an example of how to show design time HMTL: Customizable 'Loading' Control for Web Applications with Designer Support[^]

Posted 23-Jun-10 22:07pm

Sandeep Mewara