我正在开发一个MVC 5应用程序。在我的MVC 5应用程序中,我希望从Add_Data文件夹创建一个mdf文件,但是当我想从Add_Data文件夹的Add_Data菜单中添加mdf文件时,我会收到一个错误
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct