Error when Loading Dynamic UserControl from current User Control's Button Click event Calling Page Event


I have a panel that I load user Control in no problem.  The problem
arrises when I do a post back on one of these user controls.  I have
button it does a click event.  In this click event I will do some
database updates, then I will use reflection to call a method in the
parent ( to load the new user control.  Its at this point
after it loads the new user control that it throws the error "The
control must be placed inside a form tag with runat=server".
Now, my methods that managers the user control works.  I am able to
click on the parent page menu and load other user controls no problem.
This only occurs when I'm trying to load a new user control in place of
the current user control from the current child user control.

So something like this:

Parent page has method:

public void PostBackLoadUserControl(string Description, string

Current user control click event does this:

protected void Button1_Click(object sender, EventArgs e)
        //Session.Add("LoadUC",  new string[] { "Test Control 4",
"test4.ascx" });

            MethodInfo mi =
BindingFlags.Public | BindingFlags.Instance);
        if (mi != null)
            mi.Invoke(this.Page, new Object[] { "Test Control",

The mi.Invoke works and after it loads in the new user control it comes
back to the Button1_Click event and leaves ok. It invokes the  PostBackLoadUserControl() in the
parent page succesfully and the page
tries to load with the new user control and throws the error "The
control must be placed inside a form tag with runat=server".
This control will be inside a form tag when its loaded because it is
loaded into a panel that is inside a form tag on the parent page.  I'm not sure why this
only happens when trying to do it from a child user control.

 I came up with this method becaues I didn't want to do a bubble event and wanted something that could be easily used by all my usercontrols.  I'm up to any other ideas.  Anyone know why this error would happen or basically a way I could load a new user control after an event happens in the current user control into the main page?





9/5/2006 7:08:29 PM 93655 articles. 6 followers. Follow

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I'm bumping this hoping someone will reply.




9/6/2006 3:01:15 PM

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