要到多个角色使用的 Roles.AddUserToRoles 中像这样

  Roles.AddUserToRoles（电子邮件，新的字符串[] {编辑，审阅，作者}）;
 

我不知道，更新现有角色的方法。但你总是可以删除角色和添加一个新的角色，而不是。

in my web site, i have three roles(Editor , Reviewer and Author) In some situations I need to add my user all 3 roles by coding. how can i do that? an also how can i update my user roles? thank you very much please guide me.

 MembershipUser user = Membership.CreateUser(email, "123456",email);
 Roles.AddUserToRole(email, "Editor");

To add user to multiple roles use Roles.AddUserToRoles like this

Roles.AddUserToRoles(email, new string[] {"Editor", "Reviewer", "Author" });

I do not know about a method that updates an existing role. But you can always delete a role and add a new role instead.