Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

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()

ExceptionCondition
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();
        }
    }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
Show:
© 2015 Microsoft