Backup DataBase as .bak sql express 2005 C# .Net By Praveen P.R

using Microsoft.SqlServer.Management;
using Microsoft.SqlServer.Management.Smo;
using Microsoft.SqlServer.Management.Common;
using System.Windows.Forms;

  public void BackupDatabase(String databaseName, String userName, String password, String serverName, String destinationPath)
  {
  try
  {
  Backup sqlBackup = new Backup();

  sqlBackup.Action = BackupActionType.Database;
  sqlBackup.BackupSetDescription = "ArchiveDataBase:" + DateTime.Now.ToShortDateString();
  sqlBackup.BackupSetName = "Archive";

  sqlBackup.Database = databaseName;

  BackupDeviceItem deviceItem = new BackupDeviceItem(destinationPath, DeviceType.File);
  //Backup bu = new Backup();
  //bu.Database = databaseName;

  //bu.Devices.Add(deviceItem);

  //bu.Initialize = true;
  //bu.PercentCompleteNotification = 10;
  //// add percent complete and complete event handlers

  //bu.PercentComplete += new PercentCompleteEventHandler(Backup_PercentComplete);

  //bu.Complete += new ServerMessageEventHandler(Backup_Complete);

  //ServerConnection connection = new ServerConnection(serverName,userName,password);

  ServerConnection connection = new ServerConnection(serverName);
  Server sqlServer = new Server(connection);

  Database db = sqlServer.Databases[databaseName];

  sqlBackup.Initialize = true;
  sqlBackup.Checksum = true;
  sqlBackup.ContinueAfterError = true;

  sqlBackup.Devices.Add(deviceItem);
  sqlBackup.Incremental = false;

  sqlBackup.ExpirationDate = DateTime.Now.AddDays(3);
  sqlBackup.LogTruncation = BackupTruncateLogType.Truncate;

  sqlBackup.FormatMedia = false;

  sqlBackup.SqlBackup(sqlServer);
  MessageBox.Show("Database Backup success....\nBackup file in " + destinationPath + ".", "Backup success", MessageBoxButtons.OK, MessageBoxIcon.None);
  }
  catch(Exception ex)
  {
  MessageBox.Show("Database Backup failed....", "Backup failed\n"+ex.InnerException.ToString () +"", MessageBoxButtons.OK, MessageBoxIcon.Error);
  }
  }

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