Question

当我在ClaimsIdentity中对某些声明进行'foreach'循环时，我遇到了一个问题。当我逐步完成它 - 它应该完成枚举，我看到它回到'in'然后在我得到关于连接到SQL Server的HttpException之前得到十秒钟的延迟。我知道这听起来很奇怪，但是当它根据调试发生时 - 在我的FindAllClaimsByType方法的foreach循环中（我使用Entity Framework后很快连接到数据库，但我的断点从未受到影响）。编辑：我应该提一下，如果我跳过这个并在控制器中执行某些操作，我可以很好地连接到我的数据库。这是在ASP.NET MVC 4

中

编辑2：我把它缩小了一点。只有在找不到Claim时才会这样。我如何枚举声明（如果我使用ClaimsPrincipal.HasClaim()或foreach循环或.Any() LINQ表达式）并不重要 - 如果可以，它将始终抛出此异常找到索赔。

建立与SQL Server的连接时发生与网络相关或特定于实例的错误。服务器未找到或无法访问。验证实例名称是否正确，以及SQL Server是否配置为允许远程连接。（提供程序：SQL网络接口，错误：26 - 查找指定的服务器/实例时出错）

我的代码如下：

public class ClaimsService
{

    private ClaimsIdentity _identity;

    public ClaimsService(ClaimsIdentity identity)
    {
        _identity = identity;
    }

    private Claim FindFirstClaimByType(string claimtype)
    {
        return FindAllClaimsByType(claimtype).FirstOrDefault();
    }

    private IEnumerable<Claim> FindAllClaimsByType(string claimtype)
    {
        ICollection<Claim> claims = new Collection<Claim>();
        foreach (Claim claim in _identity.Claims)
        {
            if (claim.Type == claimtype)
            {
                claims.Add(claim);
            }
        }

        return claims;
    }

    public School FindSchoolFromClaims()
    {
        string realm = FindFirstClaimByType(Data.Configuration.RealmClaimType).Value.ToString();

        using (SqlDatabaseContext db = new SqlDatabaseContext())
        {
            School school = null;


            school = db.Schools.Where(s => s.Realm == realm).FirstOrDefault();

            return school;
        }
    }

    public Developer FindDeveloperFromClaims()
    {
        string realm = FindFirstClaimByType(Data.Configuration.RealmClaimType).Value.ToString();
        string nameidentifier = FindFirstClaimByType(ClaimTypes.NameIdentifier).Value.ToString();

        using (SqlDatabaseContext db = new SqlDatabaseContext())
        {
            Developer developer = null;


            if (realm == Data.Configuration.SoloDeveloperRealmMsft)
            {
                developer = db.Developers.OfType<SoloDeveloper>().Where(dev => dev.NameIdentifier == nameidentifier).FirstOrDefault();
            }
            else
            {
                developer = db.Developers.OfType<CompanyDeveloper>().Where(dev => dev.Realm == realm).FirstOrDefault();
            }

            return developer;
        }
    }
}

堆栈追踪：

[SqlException（0x80131904）：建立与SQL Server的连接时发生与网络相关或特定于实例的错误。服务器未找到或无法访问。验证实例名称是否正确，以及SQL Server是否配置为允许远程连接。（提供程序：SQL网络接口，错误：26 - 找到指定的服务器/实例时出错）]      System.Data.SqlClient.SqlInternalConnection.OnError（SqlException exception，Boolean breakConnection，Action 1 wrapCloseInAction) +5296071 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +558 System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover) +5308555 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) +920 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) +434 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) +5311099 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＆amp; connection）+5313314      System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection（DbConnection outerConnection，DbConnectionFactory connectionFactory，TaskCompletionSource 1 retry, DbConnectionOptions userOptions) +143 System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource 1 retry）+83      System.Data.SqlClient.SqlConnection.Open（）+96      System.Web.Management.SqlServices.GetSqlConnection（String server，String user，String password，Boolean trusted，String connectionString）+76

[HttpException（0x80004005）：无法连接到SQL Server数据库。]      System.Web.Management.SqlServices.GetSqlConnection（String server，String user，String password，Boolean trusted，String connectionString）+131      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

Answer 1

我在Azure云解决方案中遇到了全新的ASP MVC Web角色问题。尚未设置SQL，除了Azure ACS联合登录之外，还没有其他任何功能。我只是在测试ACS，WIF和多个身份提供商的功能。

默认情况下，RoleManager功能似乎已启动。一旦我在web.config中删除它 - 在枚举声明时不再尝试SQL Server访问。

添加以下行：

  <modules>
     <remove name="RoleManager" />
     ...

希望这有帮助。

Rick Shuri

枚举索引会导致HttpException SqlException

1 个答案: