User Control not rendered in Visual Studio

[Brendon]

I have created a custom composite server control. When I drag the control
from the toolbox into Visual Studio it does not display in Visual Studio,
instead it shows the littel green arrow and nothing else. When I run the
application it shows the LiteralControl that I have added. Does anyone know
what I might be missing to make it also show up in Visual Studio? I have
included the entire class that I am trying to make.

Thanks,
Brendon

[ToolboxData("<{0}:NextEvent runat=server></{0}:NextEvent>")]
public class NextEvent :
System.Web.UI.WebControls.WebControl,INamingContainer
{
protected override void CreateChildControls()
{
Controls.Add(new LiteralControl("<h3>Enter a number : </h3>"));

}

}

 

[Jason Bentley]

Brendon, you are not using OnPreRender or Render in your control. You
won't see any output unless you do.

Jason Bentley
http://geekswithblogs.net/jbentley

 

[Brendon]

From what I have read you don't need to implement the OnPreRender or Render
if you are creating a composite web control. The function
CreateChildControls() will write all of the Rendering for you. I believe
that is why you are suppose to call EnsureChildControls(), but I do not have
any properties so I am not call that function. I was wondering if there was
a way to do a Composite control without the OnPreRender or Render methods.

Thanks and please let me know if you have any more ideas.
Brendon

 

[Jason Bentley]

Brendon, you are right; you do not have to use OnRender or Render. If
you want to see a visual representation of your control at design time
support and do not override the Render events you will have to
implement a designer class via System.Web.UI.Design.ControlDesigner.
Sorry. Here is a brief discussion on the topic:
http://www.mcse.ms/message1479961.html

Jason Bentley
http://geekswithblogs.net/jbentley

 

[Brendon]

Thank you for all of the help, I will look into a custom designer for my
control. The problem that I still see is I have a class that doesn't
implement OnRender or Render and doesn't have it's own custom designer, but
still renders in both the designer and on a web page. I will keep working
at, but thanks for the input so far Jason.

 

[recoil]

If you are implementing your own designer and the control renders at
runtime then it very well could be that the CreateChildControls is not
getting called at design time.

Either way I would check to see if CreateControl is getting called at
design time.