Customize user security context

Using system;

Using system. Security;

Using system. Security. Principal;

Using system. text;

Using system. Collections. Specialized;

Namespace securitydll

{

///

/// Summary of class1.

Public class EMP

{Public EMP ()

{

// Perform permission check. Only the admin role can call

System. Security. permissions. principalpermission perm = new system. Security. permissions. principalpermission (null, roles. admin. tostring (), true );

Perm. Demand ();

}

// Business processing

Public int add (int A, int B)

{Return a + B ;}

}

Public class mycredentials: system. Security. Principal. iprincipal

{

# Region iprincipal Member

Private system. Security. Principal. genericidentity _ identity;

Private stringcollection _ roles = new stringcollection ();

Public mycredentials (string username, string [] roles)

{

// Here we can do some authentication code

_ Identity = new genericidentity (username, "AAA ");

If (null! = Roles) _ roles. addrange (roles );

}

Public system. Security. Principal. iidentity identity

{

Get {

// Todo: Add mycredentials. Identity getter.

Return _ identity;

}

}

Public bool isinrole (string role)

{

// Todo: Add mycredentials. isinrole

Return _ roles. Contains (role );

}

# Endregion

}

///

/// Role provided by the current application ///

Public Enum roles {admin, sales, guest }}

// The client has different results when calling components with different role identities.

Private void button#click (Object sender, system. eventargs E)

{

Securitydll. mycredentials c = new securitydll. mycredentials ("greystar", new string [] {"sales "});

System. Threading. thread. currentprincipal = C;

Securitydll. emp ee = new securitydll. EMP ();

MessageBox. Show (EE. Add (1,1). tostring ());

}

Private void button2_click (Object sender, system. eventargs e ){

Securitydll. mycredentials c = new securitydll. mycredentials ("greystar", new string [] {"admin "});

// Call with the correct role, everything is normal

System. Threading. thread. currentprincipal = C;

Securitydll. emp ee = new securitydll. EMP ();

MessageBox. Show (EE. Add (1,1). tostring ());

}