怎样做sql server数据库的还原_Mssql数据库教程

string restoreSql = "use master;";
restoreSql = "restore database @dbname from disk = @path;";
string pai = "use master;ALTER DATABASE Wy SET OFFLINE WITH ROLLBACK IMMEDIATE;ALTER DATABASE Wy SET ONLINE WITH ROLLBACK IMMEDIATE";
SqlConnection conn = new SqlConnection(ConnStr);
SqlCommand com1 = new SqlCommand(pai, conn);

SqlCommand myCommand = new SqlCommand(restoreSql, new SqlConnection(ConnStr));

myCommand.Parameters.Add("@dbname", SqlDbType.Char);
myCommand.Parameters["@dbname"].Value = dbname;
myCommand.Parameters.Add("@path", SqlDbType.Char);
myCommand.Parameters["@path"].Value = path;

try
{
conn.Open();
com1.ExecuteNonQuery();
conn.Close();
myCommand.Connection.Open();
myCommand.ExecuteNonQuery();
infoLabel.Text = "恢复成功！<br>已经把备份" path "恢复到数据库";

}
catch(Exception ex)
{
infoLabel.Text = "恢复失败！<br>出错信息如下：<br>" ex.ToString();
}
finally
{
myCommand.Connection.Close();

}
}