如何恢复 SQL Server 2012 数据库？

Question

如何从 SQL Server 2012 恢复数据库？

这是我的代码：

private void [connTes()][1]
{
        try
        {
            conString = "server=.\SQLEXPRESS;database=db_datatestproject;user=admin;password=123;Integrated Security=True";
            connnn = new SqlConnection(conString);
            connnn.Open();
        }
        catch
        {
        }
}

private void button1_Click(object sender, EventArgs e)
{
        connTes();

        try
        {
            if (txtlocation.Text == "")
            {
                MessageBox.Show("select database");
                return;
            }
            else
            {
                string databesing = connnn.Database.ToString();
                string a = "ALTER DATABASE " + databesing + " SET SINGLE_USER WITH ROLLBACK IMMEDIATE;";
                a += "RESTORE DATABASE "+databesing+" FROM DISK ='"+txtlocation.Text+"' WITH REPLACE;";

                SqlCommand cmd = new SqlCommand(a, connnn);
                SqlDataReader dr = cmd.ExecuteReader();
                connnn.Close();
                connnn.Dispose();

                MessageBox.Show("done restored");
            }
        }
        catch(SqlException ex)
        {
            MessageBox.Show(ex.ToString());
        }
}

这是我得到的错误：

RESTORE cannot process database 'db_testproject' because it use by the session. It is recommended that the master database be used when performing this operation. RESTORE DATABASE is terminating abnormally.

如何解决这个错误？

非常感谢任何帮助。

谢谢。

Answer 1

添加

USE MASTER; 
GO

到您的 TSQL 恢复命令的开头。

您需要在另一个数据库中，而不是您正在恢复的数据库中。

另请注意@marc_s的评论："Since you're not getting back any data from that SqlCommand, use ExecuteNonQuery() instead of ExecuteReader()"

如何恢复 SQL Server 2012 数据库？

How to restore SQL Server 2012 database?

c#

database

restore

sql-server-2012