public static string GetDisplayName <TModel, TProperty>(this TModel model, Expression <Func <TModel, TProperty> > expression)
{
Type type = typeof(TModel);
MemberExpression memberExpression = (MemberExpression)expression.Body;
string propertyName = ((memberExpression.Member is PropertyInfo) ? memberExpression.Member.Name : null);
// First look into attributes on a type and it's parents
DisplayAttribute attr;
attr = (DisplayAttribute)type.GetProperty(propertyName).GetCustomAttributes(typeof(DisplayAttribute), true).SingleOrDefault();
// Look for [MetadataType] attribute in type hierarchy
// http://stackoverflow.com/questions/1910532/attribute-isdefined-doesnt-see-attributes-applied-with-metadatatype-class
if (attr == null)
{
ModelMetadataTypeAttribute metadataType = (ModelMetadataTypeAttribute)type.GetCustomAttributes(typeof(ModelMetadataTypeAttribute), true).FirstOrDefault();
if (metadataType != null)
{
var property = metadataType.MetadataType.GetProperty(propertyName);
if (property != null)
{
attr = (DisplayAttribute)property.GetCustomAttributes(typeof(DisplayNameAttribute), true).SingleOrDefault();
}
}
}
return((attr != null) ? attr.Name : String.Empty);
}
private static MemberInfo GetMatchingElement(MemberInfo element)
{
Type sourceType = element as Type;
bool elementIsType = sourceType != null;
if (sourceType == null)
{
sourceType = element.DeclaringType;
}
ModelMetadataTypeAttribute metadataTypeAttribute = (ModelMetadataTypeAttribute)
Attribute.GetCustomAttribute(sourceType, typeof(ModelMetadataTypeAttribute), false);
if (metadataTypeAttribute == null)
{
return(element);
}
sourceType = metadataTypeAttribute.MetadataType;
if (elementIsType)
{
return(sourceType);
}
MemberInfo[] matchingMembers =
sourceType.GetMember(
element.Name,
element.MemberType,
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
if (matchingMembers.Length > 0)
{
MethodBase methodBase = element as MethodBase;
if (methodBase == null)
{
return(matchingMembers[0]);
}
Type[] parameterTypes = methodBase.GetParameters().Select(pi => pi.ParameterType).ToArray();
return(matchingMembers.Cast <MethodBase>().FirstOrDefault(mb => MatchMethodBase(mb, parameterTypes)) ?? element);
}
return(element);
}
