如何将 SMO ServerConnection 和数据库与 Azure SQL 数据库中包含的用户一起使用

Question

有没有办法为无权访问master的用户使用SMO？

我正在通过 SMO 编写 Azure SQL 数据库的 DLL。我使用具有 db_owner 角色的包含用户来访问 db 和 DDL，但它会引发异常。 SMO 在我创建 ServerConnection 后立即尝试默认为 master，其中包含的用户没有权限。

我在 .NET Core 3.0 中使用了在 nuget 和代码上发布的最新 SMO 版本。

--exec in master db
CREATE LOGIN testuser WITH PASSWORD='...';

--exec in user db: testsqldb
CREATE USER testuser FROM LOGIN testuser
ALTER ROLE db_owner ADD MEMBER testuser

连接字符串有InitialCatalog = testsqldb

var connectionStringBuilder = new SqlConnectionStringBuilder(sourceConnectionString);
var serverConnection = CreateServerConnection(_connectionString);

//this throws exception
var server = new Server(serverConnection);

异常详情

{"The server principal \"testuser\" is not able to access the database \"master\" under the current security context.\r\nCannot open user default database. Login failed.\r\nLogin failed for user 'testuser'."}

我希望 ServerConnection 遵守 ConnectionString 中指定的 InitialCatalog，而不是默认为 'master'

Answer 1

我已经针对 SQL Azure 测试了以下代码：

ServerConnection conn = new ServerConnection(instanceUrl, username, password);
conn.DatabaseName = database;
_sqlServer = new Server(conn);

Answer 2

请参考这个SMO官方教程：Connecting to an Instance of SQL Server by Using SQL Server Authentication in Visual Basic。

当您使用 SQL Server 身份验证连接到 SQL Server 实例时，您必须指定身份验证类型。此示例演示了声明 ServerConnection 对象变量的替代方法，该方法可以重用连接信息。

示例是演示如何连接到远程的 Visual Basic .NET 代码，vPassword 包含登录名和密码。

' compile with:   
' /r:Microsoft.SqlServer.Smo.dll  
' /r:Microsoft.SqlServer.ConnectionInfo.dll  
' /r:Microsoft.SqlServer.Management.Sdk.Sfc.dll   

Imports Microsoft.SqlServer.Management.Smo  
Imports Microsoft.SqlServer.Management.Common  

Public Class A  
   Public Shared Sub Main()  
      Dim sqlServerLogin As [String] = "user_id"  
      Dim password As [String] = "pwd"  
      Dim instanceName As [String] = "instance_name"  
      Dim remoteSvrName As [String] = "remote_server_name"  

      ' Connecting to an instance of SQL Server using SQL Server Authentication  
      Dim srv1 As New Server()   ' connects to default instance  
      srv1.ConnectionContext.LoginSecure = False   ' set to true for Windows Authentication  
      srv1.ConnectionContext.Login = sqlServerLogin  
      srv1.ConnectionContext.Password = password  
      Console.WriteLine(srv1.Information.Version)   ' connection is established  

      ' Connecting to a named instance of SQL Server with SQL Server Authentication using ServerConnection  
      Dim srvConn As New ServerConnection()  
      srvConn.ServerInstance = ".\" & instanceName   ' connects to named instance  
      srvConn.LoginSecure = False   ' set to true for Windows Authentication  
      srvConn.Login = sqlServerLogin  
      srvConn.Password = password  
      Dim srv2 As New Server(srvConn)  
      Console.WriteLine(srv2.Information.Version)   ' connection is established  

      ' For remote connection, remote server name / ServerInstance needs to be specified  
      Dim srvConn2 As New ServerConnection(remoteSvrName)  
      srvConn2.LoginSecure = False  
      srvConn2.Login = sqlServerLogin  
      srvConn2.Password = password  
      Dim srv3 As New Server(srvConn2)  
      Console.WriteLine(srv3.Information.Version)   ' connection is established  
   End Sub  
End Class

您可以使用新登录名/用户testuser 连接到testsqldb，方法是更改​​ SMO。

希望这会有所帮助。