.Net下的数据备份和还原

2022-07-15 80酷酷网 80kuku.com

　　数据库：SQL Server ；引用SQLDMO

　　◆数据备份：
/// <summary>
/// 备份数据库
/// </summary>
private void btnBackUp_Click(object sender, System.EventArgs e)
{
   this.Cursor = Cursors.WaitCursor;
   this.label1.Text = " 正在进行档案库的数据备份，这可能需要几秒到几十的时间，请稍候...";
   this.label1.Visible = true;
   this.label1.Refresh();
   this.pBar1.Visible = true;
   //------------------------------------------------------------------------------------

   string selfName = “D:\NorthwindBak“;
   string deviceName = “NorthwindBak“;
   string remark = "备份测试";

   //◆数据备份：
   SQLDMO.Backup oBackup = new SQLDMO.BackupClass();
   SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
   oBackup.Action = 0 ;
   oBackup.Initialize = true ;
   SQLDMO.BackupSink_PercentCompleteEventHandler pceh = new SQLDMO.BackupSink_PercentCompleteEventHandler(Step);
   oBackup.PercentComplete += pceh;

   try
   {
    oSQLServer.LoginSecure = false;
    oSQLServer.Connect(Common.MySettings.SqlServerName, "sa", "");
    oBackup.Action = SQLDMO.SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;
    oBackup.Database = "Northwind";//数据库名
    oBackup.Files = selfName;//文件路径
    oBackup.BackupSetName = deviceName;//备份名称
    oBackup.BackupSetDescription = remark;//备份描述
    oBackup.Initialize = true;
    oBackup.SQLBackup(oSQLServer);

   }
   catch(System.Exception ex)
   {
    Common.ShowMsg("数据备份失败：\n" + ex.ToString());
   }
   finally
   {
    oSQLServer.DisConnect();
   }

   //------------------------------------------------------------------------------------
   this.label1.Visible = false;
   this.pBar1.Visible = false;
   this.Cursor = Cursors.Default;
}

/// <summary>
/// 显示备份进度条
/// </summary>
private void Step(string message,int percent)
{
this.pBar1.Value = percent ;
}

　　◆数据还原：

/// <summary>
/// 还原数据库
/// </summary>
private void btnRestore_Click(object sender, System.EventArgs e)
{

   this.Cursor = Cursors.WaitCursor;
   this.label1.Text = " 正在进行档案库的数据还原，这可能需要几秒到几十的时间，请稍候...";
   this.label1.Visible = true;
   this.label1.Refresh();
   this.pBar1.Visible = true;
   //------------------------------------------------------------------------------------

   string fileName = "NorthwindBak";
   string filePath = "D:\NorthwindBak";
   string remark = "备份测试";

   SQLDMO.Restore oRestore = new SQLDMO.RestoreClass();
   SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
   oRestore.Action = 0 ;
   SQLDMO.RestoreSink_PercentCompleteEventHandler pceh = new SQLDMO.RestoreSink_PercentCompleteEventHandler(Step);
   oRestore.PercentComplete += pceh;
   try
   {
                oSQLServer.Connect(Common.MySettings.SqlServerName, "sa", "");
                SQLDMO.QueryResults qr = oSQLServer.EnumProcesses(-1) ;
                int iColPIDNum = -1 ;
                int iColDbName = -1 ;

//杀死其它的连接进程
                for(int i=1;i<=qr.Columns;i++)
                {
                    string strName = qr.get_ColumnName(i) ;
                    if (strName.ToUpper().Trim() == "SPID")
                    {
                        iColPIDNum = i ;
                    }
                    else if (strName.ToUpper().Trim() == "DBNAME")
                    {
                        iColDbName = i ;
                    }
                    if (iColPIDNum != -1 && iColDbName != -1)
                        break ;
                }

                for(int i=1;i<=qr.Rows;i++)
                {
                    int lPID = qr.GetColumnLong(i,iColPIDNum) ;
                    string strDBName = qr.GetColumnString(i,iColDbName) ;
                    if (strDBName.ToUpper() == "Northwind".ToUpper())
                        oSQLServer.KillProcess(lPID) ;
                }

    oRestore.Action = SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database;
    oRestore.Database = "Northwind";
    oRestore.Files = filePath;
    oRestore.FileNumber = 1;
    oRestore.ReplaceDatabase = true;
    oRestore.SQLRestore(oSQLServer);

}
            catch(System.Exception ex)
            {
                Common.ShowMsg("数据还原失败：\n" + ex.ToString());
   }
   finally
   {
    oSQLServer.DisConnect();
   }

   //------------------------------------------------------------------------------------
   this.label1.Visible = false;
   this.pBar1.Visible = false;
   this.Cursor = Cursors.Default;
}

/// <summary>
/// 显示还原进度条
/// </summary>
private void Step(string message,int percent)
{
this.pBar1.Value = percent ;
}