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 = "恢復(fù)成功！<br>已經(jīng)把備份" path "恢復(fù)到數(shù)據(jù)庫(kù)";

}
catch(Exception ex)
{
infoLabel.Text = "恢復(fù)失敗！<br>出錯(cuò)信息如下：<br>" ex.ToString();
}
finally
{
myCommand.Connection.Close();

}
}