Roles.RoleExists（）导致SQL网络接口，错误：26

Question

我有一个带有帐户控制器的ASP.NET MVC5 Internet应用程序。

我想补充的角色，给用户的singup 3个角色之间选择的选择，我的注册方法如下：

 [HttpPost] 
    [AllowAnonymous] 
    [ValidateAntiForgeryToken] 
    public async Task<ActionResult> Register(RegisterViewModel model) 
    { 
     if (ModelState.IsValid) 
     { 
      if (!Roles.RoleExists("user")) 
      { 
       Roles.CreateRole("user"); 
      } 

      if (!Roles.RoleExists("superuser")) 
      { 
       Roles.CreateRole("superuser"); 
      } 

      if (!Roles.RoleExists("admin")) 
      { 
       Roles.CreateRole("admin"); 
      } 

      var user = new ApplicationUser { UserName = model.Email, Email = model.Email }; 
      var result = await UserManager.CreateAsync(user, model.Password); 
      if (result.Succeeded) 
      { 


       var currentUser = UserManager.FindByName(user.UserName); 

       string userType = null; 
       switch (model.Type) 
       { 
        case 1: 
         userType = "user";       
         break; 
        case 2: 
         userType = "superuser"; 
         break; 
        case 3: 
         userType = "admin"; 
         break; 
        default: 
         return View(model); 
         break; 
       } 


       var roleresult = UserManager.AddToRole(currentUser.Id,userType); 
       return RedirectToAction("Index", "Home"); 
      } 
      AddErrors(result); 
     } 

     return View(model); 
    } 

当我尝试注册和代码达到if (!Roles.RoleExists("user"))网站挂起约10秒，我得到以下错误：

SQL Network Interfaces, error: 26 


    [SqlException (0x80131904): Der opstod en netværksrelateret eller forekomstspecifik fejl, da det blev forsøgt at oprette forbindelse til SQL Server. Serveren blev ikke fundet, eller der var ikke adgang til den. Kontroller, at forekomstnavnet er korrekt, og at SQL Server er konfigureret til at tillade fjernforbindelser. (provider: SQL Network Interfaces, error: 26 - Fejl ved søgning efter angivet server/forekomst.)] 
    System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +5340655 
    System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +244 
    System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover) +5350915 
    System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover) +145 
    System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout) +922 
    System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) +307 
    System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData) +518 
    System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) +5353725 
    System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions) +38 
    System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +5355926 
    System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +146 
    System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +16 
    System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +94 
    System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +110 
    System.Data.SqlClient.SqlConnection.Open() +96 
    System.Web.Management.SqlServices.GetSqlConnection(String server, String user, String password, Boolean trusted, String connectionString) +75 

[HttpException (0x80004005): Der kan ikke oprettes forbindelse til SQL Server-databasen.] 
    System.Web.Management.SqlServices.GetSqlConnection(String server, String user, String password, Boolean trusted, String connectionString) +130 
    System.Web.Management.SqlServices.SetupApplicationServices(String server, String user, String password, Boolean trusted, String connectionString, String database, String dbFileName, SqlFeatures features, Boolean install) +89 
    System.Web.Management.SqlServices.Install(String database, String dbFileName, String connectionString) +27 
    System.Web.DataAccess.SqlConnectionHelper.CreateMdfFile(String fullFileName, String dataDir, String connectionString) +386 

我不知道如何将错误消息更改为英语。

在web.config中我加<roleManager enabled="true" />到的System.Web和我的ConnectionString如下：

<connectionStrings> 
<add name="DefaultConnection" connectionString="Data Source=lmjzf199gd.database.windows.net;Initial Catalog=lenioDb;Persist Security Info=True;User ID=lenio;Password=*******;Integrated Security=False;Encrypt=False;TrustServerCertificate=False;" providerName="System.Data.SqlClient" /> 

显然没有设置口令的连接字符串中“*******”。

我使用的数据库是天蓝色的。

Answer 1

在<roleManager enabled="true">你必须指定你的角色提供者以及正确的连接字符串（这是问题）。例如：

<roleManager enabled="true" cacheRolesInCookie="true" cookieName=".ASPROLES" defaultProvider="DefaultRoleProvider"> 
    <providers> 
     <add connectionStringName="DefaultConnection" applicationName="/" name="DefaultRoleProvider" 
     type="System.Web.Security.SqlRoleProvider"/> 
    </providers> 
</roleManager> 

但首先确保您的数据库具有均已通过安装aspnet_regsql（see this link）工作所需的默认提供的表和SQL过程。