protected override object FetchValue(string key)
{
StateBag pageViewState = ModelBindingExecutionContext.GetService <StateBag>();
if (pageViewState != null)
{
return(pageViewState[key]);
}
return(null);
}
private static RouteValueDictionary GetRouteValues(ModelBindingExecutionContext modelBindingExecutionContext)
{
RouteData routeData = modelBindingExecutionContext.GetService <RouteData>();
if (routeData != null)
{
return(routeData.Values);
}
return(new RouteValueDictionary());
}
protected override object FetchValue(string controlId)
{
if (String.IsNullOrEmpty(controlId))
{
return(null);
}
Control dataControl = ModelBindingExecutionContext.GetService <Control>();
//Following code taken from ControlParameter - code duplicated because ControlPrameter throws exceptions whereas we do not.
string propertyName = PropertyName;
//Bug Fix # 280051 : First try to find it on dataControl as DataBoundControlHelper.FindControl only walks up starting from dataControl's NamingContainer.
Control foundControl = dataControl.FindControl(controlId) ?? DataBoundControlHelper.FindControl(dataControl, controlId);
if (foundControl == null)
{
return(null);
}
ControlValuePropertyAttribute controlValueProp = (ControlValuePropertyAttribute)TypeDescriptor.GetAttributes(foundControl)[typeof(ControlValuePropertyAttribute)];
// If no property name is specified, use the ControlValuePropertyAttribute to determine which property to use.
if (String.IsNullOrEmpty(propertyName))
{
if ((controlValueProp != null) && (!String.IsNullOrEmpty(controlValueProp.Name)))
{
propertyName = controlValueProp.Name;
}
else
{
return(null);
}
}
// Get the value of the property
object value = DataBinder.Eval(foundControl, propertyName);
// Convert the value to null if this is the default property and the value is the property's default value
if (controlValueProp != null &&
controlValueProp.DefaultValue != null &&
controlValueProp.DefaultValue.Equals(value))
{
return(null);
}
return(value);
}
