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Issues With Initially Invisible ComboBox and Width Is in Percentage

The width of the ComboBox is incorrect after showing if it has Label

ComboBox Not Initially Visible

XML

<telerik:radcombobox 
	id="RadComboBox1" 
	runat="server" 
	label="label"
	width="50%">
</telerik:radcombobox>

Call the repaint() method of the ComboBox client-side object to resolve the issue after you show it or its invisible container for the first time.

Clicks on the input of a ComboBox pass through the containing IFrame (RadWindow) into the owner document

You can resolve the issue by calling comboBox.repaint() after you show the ComboBox. The most common case of this issue is when the ComboBox is in a RadWindow.