Retrieves the value used for a field's value when rendering the System.Web.UI.WebControls.BoundField object in a designer.
The value to display in the designer as the field's value.
The BoundField.GetDesignTimeValue method is a helper method used to determine what value to display for a field when rendering the System.Web.UI.WebControls.BoundField object in a designer. If real data cannot be retrieved from the data source at design time, the value returned by this method is displayed instead.
This method is used primarily by control developers.