//private static void SetDefaultPropertyOnProducer(ElementCompileTreeNode element, PropertyCompileTreeNode property, CompileContext compileContext)
//{
// string propertyName = GetDefaultPropertyNameOnProducer(element);
// SetPropertyOnProducer(element, propertyName, property, compileContext);
//}
private static string GetDefaultPropertyNameOnProducer(ElementCompileTreeNode element)
{
Type producerType = element.Producer.GetType();
ControlValuePropertyAttribute cvpa = Attribute.GetCustomAttribute(producerType, typeof(ControlValuePropertyAttribute)) as ControlValuePropertyAttribute;
if (null == cvpa)
{
throw new FormCompileException(string.Format("The producer {0} does not have a default property specified", producerType.ToString()), element.XmlSourceNodeInformation);
}
return(cvpa.PropertyName);
}
/// <devdoc>
/// Returns the updated value of the parameter.
/// </devdoc>
protected internal override object Evaluate(HttpContext context, Control control)
{
if (control == null)
{
return(null);
}
string controlID = ControlID;
string propertyName = PropertyName;
if (controlID.Length == 0)
{
throw new ArgumentException(SR.GetString(SR.ControlParameter_ControlIDNotSpecified, Name));
}
Control foundControl = DataBoundControlHelper.FindControl(control, controlID);
if (foundControl == null)
{
throw new InvalidOperationException(SR.GetString(SR.ControlParameter_CouldNotFindControl, controlID, Name));
}
ControlValuePropertyAttribute controlValueProp = (ControlValuePropertyAttribute)TypeDescriptor.GetAttributes(foundControl)[typeof(ControlValuePropertyAttribute)];
// If no property name is specified, use the ControlValuePropertyAttribute to determine which property to use.
if (propertyName.Length == 0)
{
if ((controlValueProp != null) && (!String.IsNullOrEmpty(controlValueProp.Name)))
{
propertyName = controlValueProp.Name;
}
else
{
throw new InvalidOperationException(SR.GetString(SR.ControlParameter_PropertyNameNotSpecified, controlID, Name));
}
}
// 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 &&
String.Equals(controlValueProp.Name, propertyName, StringComparison.OrdinalIgnoreCase) &&
controlValueProp.DefaultValue != null &&
controlValueProp.DefaultValue.Equals(value))
{
return(null);
}
return(value);
}
protected override object Evaluate(HttpContext ctx, Control control)
{
if (control == null)
{
return(null);
}
if (control.Page == null)
{
return(null);
}
if (String.IsNullOrEmpty(ControlID))
{
throw new ArgumentException("The ControlID property is not set.");
}
Control c = null, namingContainer = control.NamingContainer;
while (namingContainer != null)
{
c = namingContainer.FindControl(ControlID);
if (c != null)
{
break;
}
namingContainer = namingContainer.NamingContainer;
}
if (c == null)
{
throw new InvalidOperationException("Control '" + ControlID + "' not found.");
}
string propName = PropertyName;
if (String.IsNullOrEmpty(propName))
{
object [] attrs = c.GetType().GetCustomAttributes(typeof(ControlValuePropertyAttribute), true);
if (attrs.Length == 0)
{
throw new ArgumentException("The PropertyName property is not set and the Control identified by the ControlID property is not decorated with a ControlValuePropertyAttribute attribute.");
}
ControlValuePropertyAttribute attr = (ControlValuePropertyAttribute)attrs [0];
propName = attr.Name;
}
return(DataBinder.Eval(c, propName));
}
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);
}
protected internal override object Evaluate(HttpContext context, Control control)
{
if (control == null)
{
return(null);
}
string controlID = this.ControlID;
string propertyName = this.PropertyName;
if (controlID.Length == 0)
{
throw new ArgumentException(System.Web.SR.GetString("ControlParameter_ControlIDNotSpecified", new object[] { base.Name }));
}
Control component = DataBoundControlHelper.FindControl(control, controlID);
if (component == null)
{
throw new InvalidOperationException(System.Web.SR.GetString("ControlParameter_CouldNotFindControl", new object[] { controlID, base.Name }));
}
ControlValuePropertyAttribute attribute = (ControlValuePropertyAttribute)TypeDescriptor.GetAttributes(component)[typeof(ControlValuePropertyAttribute)];
if (propertyName.Length == 0)
{
if ((attribute == null) || string.IsNullOrEmpty(attribute.Name))
{
throw new InvalidOperationException(System.Web.SR.GetString("ControlParameter_PropertyNameNotSpecified", new object[] { controlID, base.Name }));
}
propertyName = attribute.Name;
}
object obj2 = DataBinder.Eval(component, propertyName);
if (((attribute != null) && string.Equals(attribute.Name, propertyName, StringComparison.OrdinalIgnoreCase)) && ((attribute.DefaultValue != null) && attribute.DefaultValue.Equals(obj2)))
{
return(null);
}
return(obj2);
}
