Question

SqlConnection con = new SqlConnection();
con.ConnectionString = @"Data Source =.; Initial Catalog = master; Integrated Security = True;";
con.Open();

string str = "USE master;" +
"EXEC sp_detach_db @dbname = N'PhoneBookDB'";

SqlCommand cmd = new SqlCommand(str, con);
cmd.ExecuteNonQuery();
con.Close();
MessageBox.Show("Detached", "Info", MessageBoxButtons.OK, MessageBoxIcon.Information);
Application.Exit();

我收到此错误：

无法分离数据库＆＃39; PhoneBookDB＆＃39;因为它目前正在使用中。将数据库上下文更改为＆＃39; master＆＃39;。

我该怎么办？

Answer 1

你可以试试这个：

SqlConnection con = new SqlConnection();
con.ConnectionString = @"Data Source =.; Initial Catalog = master; Integrated Security = True;";
con.Open();

string str = "USE master;" +
"ALTER DATABASE PhoneBookDB SET SINGLE_USER WITH ROLLBACK IMMEDIATE; EXEC sp_detach_db @dbname = N'PhoneBookDB'";

SqlCommand cmd = new SqlCommand(str, con);
cmd.ExecuteNonQuery();
con.Close();
MessageBox.Show("Detached", "Info", MessageBoxButtons.OK, MessageBoxIcon.Information);
    Application.Exit();

您还可以尝试使用sp_who或sp_whoisactive来查找当前连接并将其终止。

在C＃中分离SQL Server数据库

1 个答案: