关于 MemberDataContext 命名空间/引用

Question

我正在使用MemberDataContext的代码来更改我的Web表单代码隐藏aspnet_user表中的用户名。但它不起作用，因为找不到 MemberDataContext 命名空间。谷歌搜索，但没有结果。

谢谢

更新：

public bool ChangeUserName(Guid userId, string newUserName)
{
    bool success = false;
    newUserName = newUserName.Trim();
    // Make sure there is no user with the new username
    if (Membership.GetUser(newUserName) == null)
    {
        MembershipUser u = Membership.GetUser(userId);
        string oldUsername = u.UserName;
        // get current application
        MembershipDataContext context = new MembershipDataContext ();
        aspnet_User userToChange = (from user in context.aspnet_Users
                                    where user.UserId == userId
                                    select user).FirstOrDefault();
        if (userToChange != null)
        {
            userToChange.UserName = newUserName;
            userToChange.LoweredUserName = newUserName.ToLower();
            context.SubmitChanges();
            // ASP.NET Issues a cookie with the user name. 
            // When a request is made with the specified cookie, 
            // ASP.NET creates a row in aspnet_users table.
            // To prevent this sign out the user and then sign it in
            string cookieName = FormsAuthentication.FormsCookieName;
            HttpCookie authCookie = 
              HttpContext.Current.Request.Cookies[cookieName];
            FormsAuthenticationTicket authTicket = null;
            try
            {
                authTicket = 
                    FormsAuthentication.Decrypt(authCookie.Value);
                FormsIdentity formsIdentity = 
                    new FormsIdentity(
                        new FormsAuthenticationTicket(
                            authTicket.Version, 
                            newUserName, 
                            authTicket.IssueDate, 
                            authTicket.Expiration, 
                            authTicket.IsPersistent, 
                            authTicket.UserData));
                string y = HttpContext.Current.User.Identity.Name;
                string[] roles = 
                    authTicket.UserData.Split(new char[] { '|' });
                System.Security.Principal.GenericPrincipal genericPrincipal = 
                    new System.Security.Principal.GenericPrincipal(
                                                        formsIdentity, 
                                                        roles);
                HttpContext.Current.User = genericPrincipal;
            }
            catch (ArgumentException ex)
            {
                // Handle exceptions
            }
            catch( NullReferenceException ex)
            {
                // Handle exceptions
            }
            FormsAuthentication.SignOut();
            HttpContext.Current.Session.Abandon();
            FormsAuthentication.SetAuthCookie(newUserName, false);
            success = true;
        }
    }
    return success;
}

Answer 1

您引用的问题中的代码定义了一个名为 MembershipDataContext 的 Linq to SQL 实体数据上下文（这使它成为 DataContext 的定义）。没有一个名为 MembershipDataContext 的内置类型（我知道或可以找到）。

这是另一个执行相同操作的项目示例（包括 dbml 定义）。

Answer 2

数据上下文通常是指 linq。您使用的是 Linq 吗？如果是这样，DataContext是实际的类，因为Member部分是从DBML文件中自定义生成的类。

我希望这有所帮助。