Question

我在visual studio中创建了一个数据库，然后在我的代码中添加了连接字符串

string connString = "Data Source=(LocalDB)\v11.0;AttachDbFilename=\"D:\\POS\\App_Data\\POS.mdf\";Integrated Security=True";

当我尝试从数据库

获取数据时，我收到此异常

[Win32Exception（0x80004005）：找不到网络路径]

[SqlException（0x80131904）：与网络相关或特定于实例的   建立与SQL Server的连接时发生错误。该   服务器未找到或无法访问。验证该实例   名称是正确的，并且SQL Server配置为允许远程   连接。（提供者：命名管道提供者，错误：40 - 不能   打开与SQL Server的连接）]
  System.Data.SqlClient.SqlInternalConnectionTds..ctor（DbConnectionPoolIdentity   identity，SqlConnectionString connectionOptions，SqlCredential   凭证，Object providerInfo，String newPassword，SecureString   newSecurePassword，Boolean redirectedUserInstance，SqlConnectionString   userConnectionOptions，SessionData reconnectSessionData，   DbConnectionPool池，String accessToken，Boolean   applyTransientFaultHandling）+970
  System.Data.SqlClient.SqlConnectionFactory.CreateConnection（DbConnectionOptions   options，DbConnectionPoolKey poolKey，Object poolGroupProviderInfo，   DbConnectionPool池，DbConnection owningConnection，   DbConnectionOptions userOptions）+802
  System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection（类DBConnectionPool   pool，DbConnection owningObject，DbConnectionOptions选项，   DbConnectionPoolKey poolKey，DbConnectionOptions userOptions）+38
  System.Data.ProviderBase.DbConnectionPool.CreateObject（的DbConnection   owningObject，DbConnectionOptions userOptions，DbConnectionInternal   oldConnection）+682
  System.Data.ProviderBase.DbConnectionPool.UserCreateRequest（的DbConnection   owningObject，DbConnectionOptions userOptions，DbConnectionInternal   oldConnection）+89
  System.Data.ProviderBase.DbConnectionPool.TryGetConnection（的DbConnection   owningObject，UInt32 waitForMultipleObjectsTimeout，Boolean   allowCreate，Boolean onlyOneCheckConnection，DbConnectionOptions   userOptions，DbConnectionInternal＆amp;连接）+426
  System.Data.ProviderBase.DbConnectionPool.TryGetConnection（的DbConnection   owningObject，TaskCompletionSource 1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +78 System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource 1重试，DbConnectionOptions   userOptions，DbConnectionInternal oldConnection，DbConnectionInternal＆amp;   连接）+191
  System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal（的DbConnection

Answer 1

为什么你的数据源= LocalDB中有一个prentesis？

试试这个：

string connString = "Data Source=(LocalDB)\\v11.0;AttachDbFilename=\"D:\\POS\\App_Data\\POS.mdf\";Integrated Security=True";

<强>更新改变

Data Source= (localdb)\v11.0

到

Data Source= (localdb)\\v11.0

System.ComponentModel.Win32Exception：找不到网络路径错误

1 个答案: