接口出错,检查接口和参数!System.Data.SqlClient.SqlException (0x80131904): 在与 SQL Server 建立连接时出现与网络相关的或特定于实例的错误。未找到或无法访问服务器。请验证实例名称是否正确并且 SQL Server 已配置为允许远程连接。 (provider: Named Pipes Provider, error: 40 - 无法打开到 SQL Server 的连接) ---> System.ComponentModel.Win32Exception (0x80004005): 找不到网络路径。 在 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) 在 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) 在 System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) 在 System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) 在 System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) 在 System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) 在 System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) 在 System.Data.SqlClient.SqlConnection.Open() 在 DalUtility.SqlHelper.PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, String cmdText, SqlParameter[] cmdParms) 在 DalUtility.SqlHelper.ExecuteReader(String connectionString, CommandType cmdType, String cmdText, SqlParameter[] commandParameters) 在 DalUtility.DalHelper`1.SelectListBySql(String sql, SqlParameter[] paras) 在 ScEbookWorkshopDal.EBookDal.GetModel(Int32 id) 在 ScEbookWorkshopBll.EBookBll.GetModel(Int32 id) 在 Web.app.GetBookInfo.GetContent(Int32 ebookId, Int32 platnum, Int32 type, String language) ClientConnectionId:00000000-0000-0000-0000-000000000000 Error Number:53,State:0,Class:20