Extension of IIdentity

Question

I'm trying to use the exention method for IIdentity

Here is my class:

public static class MyIdentity 
{
    public static string FullName(this IIdentity identity)
    {
        return "John Doe";
    }
}

and I'm trying to use it on my view like this:

@Context.User.Identity.FullName()

but I get the following error:

'System.Security.Principal.IIdentity' does not contain a definition for 'FullName' and no extension method 'FullName' accepting a first argument of type 'System.Security.Principal.IIdentity' could be found

Answer 1

Make sure you've brought the namespace in which this extension method is defined into scope in your view:

@using NameSpaceInWhichTheMyIdentityStaticClassIsDefined
@User.Identity.FullName()

or if you want to use it in many views to avoid adding this namespace in each view you could also add it to the <namespaces> section of ~/views/web.config (Not to be confused with ~/web.config):

<add namespace="NameSpaceInWhichTheMyIdentityStaticClassIsDefined" />