BaseDataBoundControl.OnDataPropertyChanged Method
Definition
Important
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Rebinds the data-bound control to its data after one of the base data source identification properties changes.
protected:
virtual void OnDataPropertyChanged();protected virtual void OnDataPropertyChanged ();abstract member OnDataPropertyChanged : unit -> unit
override this.OnDataPropertyChanged : unit -> unitProtected Overridable Sub OnDataPropertyChanged ()Exceptions
An attempt was made to change the property value during the data-binding phase of the control.
Examples
The following code example shows a property that belongs to a derived data-bound control class. The 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 DataBoundControl 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, DataSourceID, or DataMember property value changes any time after the page's PreRender event has occurred.
