Why my collapsible Panel doesn't read the ClientID from my web User Control? : The Official Microsoft ASP.NET Forums

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eddyperu1

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6 Points

17 Posts

Re: Why my collapsible Panel doesn't read the ClientID from my web User Control?

Nov 07, 2008 03:44 PM|LINK

Using this line : cpe1.TargetControlID = mycontrol.StepPanel.ID

Give this error:

Exception Details: System.InvalidOperationException: The TargetControlID of 'myCollapsiblePanelExtender' is not valid. A control with ID 'ContentPanelStep' could not be found.

Using this line: cpe1.TargetControlID = Page.FindControl(myControl.ID).ID;

Give me this error:

Exception Details: System.InvalidOperationException: Extender control 'myCollapsiblePanelExtender' cannot extend 'MyControl1'. Extender controls of type 'AjaxControlToolkit.CollapsiblePanelExtender' cannot extend controls of type 'ASP.controls_exampletry_ascx'.

The code:
protected void Page_Init(object sender, EventArgs e)
{
controls_Exampletry myControl = (controls_Exampletry)Page.LoadControl("controls/Exampletry.ascx");myControl.ID = "MyControl1";
Page.Controls.Add(myControl);

AjaxControlToolkit.CollapsiblePanelExtender cpe1 = new AjaxControlToolkit.CollapsiblePanelExtender();
cpe1.ID = "myCollapsiblePanelExtender";
//cpe1.TargetControlID = Page.FindControl(myControl.ID).ID;

cpe1.TargetControlID = myControl.StepPanel.ID;

Page.Controls.Add(cpe1);
HtmlTableRow stepRow = new HtmlTableRow();HtmlTableCell stepCell = new HtmlTableCell();
stepCell.Controls.Add(myControl);

stepCell.Controls.Add(cpe1);

stepRow.Cells.Add(stepCell);

StepsTable.Rows.Add(stepRow);

}