Public Property ControlClientID As String

Visual Basic (Usage)	Copy Code
Dim instance As CallbackResult Dim value As String   instance.ControlClientID = value   value = instance.ControlClientID

public string ControlClientID {get; set;}

Return Value

This is the control whose content will be replaced with the value in Parameters if the EventArg is set to "content" or "innercontent". If EventArg is "image", the src attribute of the image with this ID will be set to the value in Parameters. If EventArg is "javascript", this property is ignored.

ControlClientID must be the client-side ID of the control. For a Web control, the ClientID property returns the correct value. The ID property may not be correct for this value, especially if the Web control is nested within a container control, such as a FloatingPanel.

Reference