System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +143</p>

System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +17</p>

System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +139</p>

System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +448</p>

System.Data.SqlClient.SqlConnection.Open() +130</p>

NewFolder1.Class1.user(String ipkey, String rz, Int32 cl) +154</p>

WebApplication1.api.ProcessRequest(HttpContext context) +498</p>

System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +814</p>

System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +132</p>

System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +73</p>

版本信息: Microsoft .NET Framework 版本:4.0.30319; ASP.NET 版本:4.8.4110.0</p>

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。</p>