An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type

Posted on: 2012-11-09

If you are trying to use a static string in an attribute for an action inside a Asp.Net MVC's controller, you will get a strange error.

An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type

This is because you are using static string instead of constant.

 public static string AdministratorRole="admin"; 

The code below works because it's a public const string instead of a public static string.

 public const string AdministratorRole="admin";