Custom Server Controls :: Trying To Render Control(ComboBox) Programmatically

Feb 18, 2010

I am trying to render control(ComboBox) programmatically, and i am getting error that tell me that i have to add ScriptManager to the page.

But, i did that, and still its not working:

[Code]....

And the render control html is:

protected override void Render( System.Web.UI.HtmlTextWriter writer )

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For example:

[code]....

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I'm working on a custom ServerControl, I've created it like below :

[ParseChildren(true), PersistChildren(true)]
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{
.....
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public MenuItem MenuItems { get; set; }
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......
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Now, How can I Parse it and render it in RenderContent method ? !!!
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public class Menu : WebControl
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....
public override void RenderControl(HtmlTextWriter output)
{
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....
}
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Below is the relevent code ...

[Code]....

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Hope this is the correct forum for this question. I am using VWD 2010 an have a web project and get the following error upon execution:

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[Code]....
[Code]....

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here's a situation and I would appreciate your response.

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Page_Load(obj s, evargs e)
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I've build a custom WebControl, which has the following structure:

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[Code]....

However it seems to render properly, it doesn't work anymore if I add some asp.net labels and input controls inside the property (see above asp.net code). I'll get the HttpException:

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My Server Control Code is as follows:

[Code]...

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[Code]....

My TopLeftPane class

[Code]....

My page code on page load event

[Code]....

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[Code]....

I have the code below, which allows me to put that markup on the page without throwing any errors, and it renders all the correct HTML, except it doesn't render the contents of the ColumnTemplate. I have replaced the Render() code with a comment because it's quite long winded and doesn't add anything important here:

[Code]....

I have tried to follow examples on MSDN and other forums but I can't make this work. I think I'm missing the code to render the contents of the template, but I don't know how to hook that up.

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I can of course index the Controls collection of the composite control to access the child control and read its properties--but that defeats the whole point of making a complex, independent custom server control.

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[URL] the steps mentioned in the link.

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