HierarchicalDataBoundControl.OnDataPropertyChanged Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Called when one of the base data source identification properties is changed, to re-bind the data-bound control to its data.
protected:
override void OnDataPropertyChanged();protected override void OnDataPropertyChanged ();override this.OnDataPropertyChanged : unit -> unitProtected Overrides Sub OnDataPropertyChanged ()Examples
The following code example demonstrates how a data-bound control can call the OnDataPropertyChanged method if a property that identifies a data source is changed after the data-bound control is initialized. This code example is part of a larger example provided for the HierarchicalDataBoundControl class.
public string DataTextField {
get {
object o = ViewState["DataTextField"];
return((o == null) ? string.Empty : (string)o);
}
set {
ViewState["DataTextField"] = value;
if (Initialized) {
OnDataPropertyChanged();
}
}
}
Public Property DataTextField() As String
Get
Dim o As Object = ViewState("DataTextField")
If o Is Nothing Then
Return String.Empty
Else
Return CStr(o)
End If
End Get
Set(ByVal value As String)
ViewState("DataTextField") = value
If Initialized Then
OnDataPropertyChanged()
End If
End Set
End Property
Remarks
The OnDataPropertyChanged method is called when the DataSource or DataSourceID is changed any time after the page's PreRender event.
