/// <summary>取得DisplayAttribute公開屬性內容</summary>
/// <param name="attr">DisplayAttribute</param>
/// <param name="propName">公開屬性名稱，預設Name</param>
/// <returns>The value that is used for display in the UI</returns>
public static string GetDisplay(this DisplayAttribute attr, string propName = "Name")
{
string empty = string.Empty;
PropertyInfo property = attr.GetType().GetProperty(propName);
if (property != null)
{
empty = (string)property.GetValue(attr);
}
return(empty);
}
public static string ToDisplay(this Enum value, DisplayProperty property = DisplayProperty.Name)
{
if (value == null)
{
return(null);
}
DisplayAttribute[] attributes =
(DisplayAttribute[])
value.GetType().GetField(value.ToString()).GetCustomAttributes(typeof(DisplayAttribute), false);
if (attributes.Length > 0)
{
DisplayAttribute attr = attributes[0];
object propValue = attr.GetType().GetProperty(property.ToString()).GetValue(attr, null);
return(propValue as string);
}
return(value.ToString());
}
private static string GetDisplayAttributeName(Type containerType, string propertyName,
DisplayAttribute displayAttribute)
{
if (containerType != null)
{
if (String.IsNullOrEmpty(displayAttribute.Name))
{
// check to see that resource key exists.
string attributeShortName = displayAttribute.GetType().Name.Replace("Attribute", "");
string resourceKey = propertyName + "_" + attributeShortName;
if (displayAttribute.ResourceType.PropertyExists(resourceKey))
{
return(resourceKey);
}
return(null);
}
}
return(null);
}
/// <summary>
/// Gets the display name.
/// </summary>
/// <typeparam name="TModel">The type of the model.</typeparam>
/// <typeparam name="TField">The type of the field.</typeparam>
/// <param name="selector">The selector.</param>
/// <param name="involveAlnnotation">if set to <c>true</c> [involve alnnotation].</param>
/// <param name="displayProperty">The display property.</param>
/// <returns></returns>
public static string GetDisplayName <TModel, TField>
(Expression <Func <TModel, TField> > selector, bool involveAlnnotation = false,
DisplayProperty displayProperty = DisplayProperty.Name)
{
try
{
System.Linq.Expressions.Expression body = selector;
if (body is LambdaExpression)
{
body = ((LambdaExpression)body).Body;
}
if (body.NodeType == ExpressionType.MemberAccess)
{
PropertyInfo propInfo = (PropertyInfo)((MemberExpression)body).Member;
if (involveAlnnotation)
{
DisplayAttribute attribute = propInfo.GetCustomAttributes(typeof(DisplayAttribute), true)
.Select(prop => (DisplayAttribute)prop).FirstOrDefault();
if (attribute != null)
{
return(attribute.GetType().GetProperty(displayProperty.ToString())
.GetValue(attribute, null).ToString());
}
else
{
return(propInfo.Name);
}
}
return(propInfo.Name);
}
}
catch (Exception ex)
{
ex.ExceptionValueTracker(selector, involveAlnnotation);
}
return(string.Empty);
}
