Using c# Is it possible using to associate properties for each enum items?
I have used the Description Attribute to add English description to an enum
item.
To add English description to each item I have done the following
public enum MyEnum
{
[Description("My First Item")]
First,
[Description("My Second Item")]
Second,
[Description("My Third Item")]
Third
}
Then I added an extension method to my enum
called GetDescription()
which allows me to get the description like so
public static string GetDescription(this Enum value)
{
Type type = value.GetType();
string name = Enum.GetName(type, value);
if (name != null)
{
FieldInfo field = type.GetField(name);
if (field != null)
{
DescriptionAttribute attr = Attribute.GetCustomAttribute(field, typeof(DescriptionAttribute)) as DescriptionAttribute;
if (attr != null)
{
return attr.Description;
}
}
}
return name;
}
However, it will help me a lot if I am able to assign a class or construct a new object.
Is it possible/How can I do something like the follow?
public enum MyEnum
{
[Description("My First Item"), new { IsFirst = true, UnitType = 1}]
First
}
or using a class
public enum MyEnum
{
[Description("My First Item"), new MyCustomClass(true, 1)]
First
}
You can decorate elements with custom Attributes. Those can contain nearly anything you want.
[AttributeUsage(AttributeTargets.Field, AllowMultiple = false, Inherited = true)]
public class DescriptorAttribute : Attribute
{
public bool IsFirst { get; }
public int UnitType { get; }
public DescriptorAttribute(bool isFirst, int unitType)
{
IsFirst = isFirst;
UnitType = unitType;
}
}
You would use this as follows:
public enum Test
{
[Descriptor(isFirst: true, unitType: 2)]
Element
}
you already have the code to read this attribute in your question.