C#实现数据库的备份与还原

***************************************数据库备份******************************


方法一：（需引用sqldmo.dll）


public static void DbBackup()




...{


SQLDMO.Backup oBackup = new SQLDMO.BackupClass();


SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();


try




...{


oSQLServer.LoginSecure = false;


oSQLServer.Connect("localhost", "sa", "1234");


oBackup.Action = SQLDMO.SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;


oBackup.Database = "Northwind";


oBackup.Files = @"d:Northwind.bak";


oBackup.BackupSetName = "Northwind";


oBackup.BackupSetDescription = "数据库备份";


oBackup.Initialize = true;


oBackup.SQLBackup(oSQLServer);


}


catch




...{


throw;


}


finally




...{


oSQLServer.DisConnect();


}


}






方法二：


在事件里填写如下


SaveFileDialog sfd = new SaveFileDialog();


string backPath ="";


sfd.Filter= "*.bak|*.bak|*.back|*.back" ;


sfd.InitialDirectory=@"C:";


sfd.FilterIndex=1;


sfd.RestoreDirectory=true;


if(sfd.ShowDialog()==DialogResult.OK)




...{


backPath = sfd.FileName.ToString();


SqlConnection con =li.createCon();


SqlCommand cmdBK = new SqlCommand();


cmdBK.CommandType = CommandType.Text;


cmdBK.Connection = con;


cmdBK.CommandText = @"backup database GJJ to disk='"+backPath+"' with init";


try




...{


con.Open();


cmdBK.ExecuteNonQuery();


MessageBox.Show("数据库备份成功","数据库备份",MessageBoxButtons.OK,MessageBoxIcon.Warning);


}


catch(Exception ex)




...{


MessageBox.Show(ex.Message);


}


finally




...{


con.Close();


con.Dispose();


}


}




**************************************数据库还原********************************************


在使用这个方法之前先引用sqldmo.dll








还原数据库#region 还原数据库


private void btn_ReBack_Click(object sender, System.EventArgs e)




...{


OpenFileDialog ofd = new OpenFileDialog();


ofd.Filter= "*.bak|*.bak|*.back|*.back" ;


ofd.FilterIndex=1;


ofd.InitialDirectory=@"C:";


if(ofd.ShowDialog()==DialogResult.OK)




...{


string backuppath = ofd.FileName.ToString();


this.DbRestore(backuppath);


}


}




#endregion






用于数据库还原的方法#region 用于数据库还原的方法


public void DbRestore(string backuppath)




...{


int Success=0;


string DataBaseAddr = ConfigurationSettings.AppSettings["DatabaseAddr"];


string DataBasePwd = ConfigurationSettings.AppSettings["Pwd"];


string DataBaseUid = ConfigurationSettings.AppSettings["Uid"];


SQLDMO.Restore oRestore = new SQLDMO.RestoreClass();


SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();


try




...{


do




...{


oSQLServer.LoginSecure = false;


oSQLServer.Connect(DataBaseAddr, DataBaseUid, DataBasePwd);


oRestore.Action = SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database;


oRestore.Database = "GJJ";


oRestore.Files = backuppath;


oRestore.FileNumber = 1;


oRestore.ReplaceDatabase = true;


DialogResult result = MessageBox.Show("此操作将修改之前所有的数据。您确定要还原数据库吗？","警告",MessageBoxButtons.OKCancel,MessageBoxIcon.Warning);


if(result==DialogResult.OK)




...{


this.ExcuteProcedure();


oRestore.SQLRestore(oSQLServer);




Success=1;


MessageBox.Show("数据库还原成功！","数据库还原",MessageBoxButtons.OK,MessageBoxIcon.Warning);


break;


}


else




...{


MessageBox.Show("未进行数据库还原！","数据库还原",MessageBoxButtons.OK,MessageBoxIcon.Warning);


}


}


while(Success==0);


}




catch(Exception ex)




...{


MessageBox.Show(ex.Message);


MessageBox.Show("数据库还原失败！","数据库还原",MessageBoxButtons.OK,MessageBoxIcon.Warning);


}


finally




...{


oSQLServer.DisConnect();


}


}


#endregion






调用killspid存储过程，杀掉进程(注意：此存储过程放在master库中，下面的连接字符串连接到此库)#region 调用killspid存储过程，杀掉进程(注意：此存储过程放在master库中，下面的连接字符串连接到此库)


private void ExcuteProcedure()




...{


SqlConnection conn1 = new SqlConnection(ConfigurationSettings.AppSettings["LinkToMaster"]);


SqlCommand cmd = new SqlCommand("killspid",conn1);


cmd.CommandType = CommandType.StoredProcedure;


cmd.Parameters.Add("@dbname","GJJ");


try




...{


conn1.Open();


cmd.ExecuteNonQuery();


}


catch(Exception ex)




...{


MessageBox.Show(ex.Message);


}


finally




...{


conn1.Close();


}


}


#endregion