ListBox.LoadPostData Method
Assembly: System.Web (in system.web.dll)
protected: virtual bool LoadPostData ( String^ postDataKey, NameValueCollection^ postCollection )
protected boolean LoadPostData ( String postDataKey, NameValueCollection postCollection )
protected function LoadPostData ( postDataKey : String, postCollection : NameValueCollection ) : boolean
Not applicable.
Parameters
- postDataKey
The key identifier for the control, used to index the postCollection.
- postCollection
A System.Collections.Specialized.NameValueCollection that contains value information indexed by control identifiers.
Return Value
true if the posted content is different from the last posting; otherwise, false.The LoadPostData method is used primarily by control developers, when deriving a custom control from the ListBox class.
The LoadPostData method indicates if the state of the ListBox control has changed. In other words, it determines if each list item in the control has the same Selected value as the last posted value. A user selecting an item in the control changes the Selected value for the corresponding ListItem object in the Items collection of the ListBox control. If some list items are selected in the control, or if the ListBox is disabled, LoadPostData returns false.
When the LoadPostData method returns true for a control, the ASP.NET page framework invokes the RaisePostDataChangedEvent method for the control.