Control.LoadControlState(Object) Method
Definition
Important
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Restores control-state information from a previous page request that was saved by the SaveControlState() method.
protected public:
virtual void LoadControlState(System::Object ^ savedState);
protected internal virtual void LoadControlState (object savedState);
abstract member LoadControlState : obj -> unit
override this.LoadControlState : obj -> unit
Protected Friend Overridable Sub LoadControlState (savedState As Object)
Parameters
Examples
The following code example overrides the LoadControlState method in a custom ASP.NET control. When this method is invoked, it determines whether control state was previously saved for the control and, if so, sets the internal property currentIndex
to the saved value.
The OnInit method is overridden to call the RegisterRequiresControlState method on the Page to indicate that the custom control uses control state.
public class Sample : Control {
private int currentIndex = 0;
protected override void OnInit(EventArgs e) {
Page.RegisterRequiresControlState(this);
base.OnInit(e);
}
protected override object SaveControlState() {
return currentIndex != 0 ? (object)currentIndex : null;
}
protected override void LoadControlState(object state) {
if (state != null) {
currentIndex = (int)state;
}
}
}
Class Sample
Inherits Control
Dim currentIndex As Integer
Protected Overrides Sub OnInit(ByVal e As EventArgs)
Page.RegisterRequiresControlState(Me)
currentIndex = 0
MyBase.OnInit(e)
End Sub
Protected Overrides Function SaveControlState() As Object
If currentIndex <> 0 Then
Return CType(currentIndex, Object)
Else
Return Nothing
End If
End Function
Protected Overrides Sub LoadControlState(ByVal state As Object)
If (state <> Nothing) Then
currentIndex = CType(state, Integer)
End If
End Sub
End Class
Remarks
Override this method when you need to specify how a custom server control restores its control state. For more information, see ASP.NET State Management Overview.
Applies to
See also
.NET
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