private PropertyDescriptor GetPropertyDescriptorFromFirstItem(object firstItem)
{
if (string.IsNullOrEmpty(this.RelationName) || (firstItem == null))
{
return(null);
}
var descriptor = ItemsSourceHelper.GetCustomTypeDescriptor(firstItem, firstItem.GetType());
if (descriptor == null)
{
return(null);
}
var properties = descriptor.GetProperties();
if ((properties != null) && (properties.Count > 0))
{
return(properties[this.RelationName]);
}
return(null);
}