Question

我对以下内容感到紧张：

我想自动登录已添加到数据库的最近创建的用户。用户数据在创建后会反映在数据库（SQL Server 2008）中。

登录代码如下：

            DatingSite.Views.Signup signupPage = e.Content as DatingSite.Views.Signup;

            signupPage.SignupComplete += (se, ev) =>
            {
                WebContext.Current.Authentication.Login(new LoginParameters(ev.NewUser.email_address, ev.NewUser.password),
                    (LoginCompleteCallback) =>
                    {
                        GetUserInformation();
                    }, null);
            };

[EnableClientAccess()]
public class AuthenticationService : AuthenticationBase<User>
{
}

public class User : UserBase
{
    // Profile properties that should be exposed as the user object
    // User information
    public string CurrentTheme { get; set; }
}

尝试执行此登录指令时，我收到此消息底部的错误。

我将以下内容插入到我的网络配置文件中：

身份验证模式=＆＃34;表单＆＃34;

System.NullReferenceException：未将对象引用设置为对象的实例。在System.ServiceModel.DomainServices.Client.ApplicationServices.AuthenticationService。＆lt;＆gt; c_ DisplayClass1 1.<WrapCompleteAction>b__0(T ao) at System.ServiceModel.DomainServices.Client.ApplicationServices.LoginOperation.InvokeCompleteAction() at System.ServiceModel.DomainServices.Client.OperationBase.Complete(Object result) at System.ServiceModel.DomainServices.Client.ApplicationServices.AuthenticationOperation.End(IAsyncResult result) at System.ServiceModel.DomainServices.Client.ApplicationServices.AuthenticationOperation.<>c__DisplayClass1.<HandleAsyncCompleted>b__0(Object state) at System.ServiceModel.DomainServices.Client.ApplicationServices.AuthenticationOperation.RunInSynchronizationContext(SendOrPostCallback callback, Object state) at System.ServiceModel.DomainServices.Client.ApplicationServices.AuthenticationOperation.HandleAsyncCompleted(IAsyncResult asyncResult) at System.ServiceModel.DomainServices.Client.AsyncResultBase.Complete() at System.ServiceModel.DomainServices.Client.ApplicationServices.WebAuthenticationService.HandleOperationComplete(OperationBase operation) at System.ServiceModel.DomainServices.Client.LoadOperation.<>c__DisplayClass4 1.b _0（LoadOperation 1 arg) at System.ServiceModel.DomainServices.Client.LoadOperation 1.InvokeCompleteAction（）在System.ServiceModel.DomainServices.Client.OperationBase.Complete（对象结果）在System.ServiceModel.DomainServices.Client.LoadOperation.Complete（DomainClientResult结果）在System.ServiceModel.DomainServices.Client.DomainContext.CompleteLoad（IAsyncResult asyncResult）在System.ServiceModel.DomainServices.Client.DomainContext。＆lt;＆gt; c_ DisplayClass1b.b _17（Object）}

请帮帮我......

Answer 1

我假设您已使用FormsAuthentication身份验证属性实例化了一个WebContext对象。如果你没有，那么预期的错误就像NotSupportedException。但为了以防万一，请将以下行添加到App.xaml.cs。

        var webContext = new WebContext();
        webContext.Authentication = new FormsAuthentication();
        ApplicationLifetimeObjects.Add(webContext);

Authentication.Login：AuthenticationService设置为null

1 个答案: