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BaseDataBoundControl.OnDataPropertyChanged Method

Rebinds the data-bound control to its data after one of the base data source identification properties changes.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

protected virtual void OnDataPropertyChanged ()
protected void OnDataPropertyChanged ()
protected function OnDataPropertyChanged ()
Not applicable.
Exception typeCondition

HttpException

An attempt was made to change the property value during the data-binding phase of the control.

The OnDataPropertyChanged method is called when the DataSource, DataSourceID, or DataMember property value changes any time after the page's PreRender event has occurred.

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();
        }
    }
}

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0
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