備份和恢復數據庫MDF C＃WinForm沒有工作

Question

我試圖在C＃WinForms中備份和恢復我的數據庫.MDF文件。 我認爲它備份，因爲我看到一個.BAK文件，但是當我恢復時，它不工作。兩者在運行時沒有錯誤，但我認爲我的代碼有問題。 這裏是我的代碼：

private void backupToolStripMenuItem1_Click(object sender, EventArgs e) 
    { 
     saveFileDialogBackUp.FileName = fileName;// +".bak"; 
     saveFileDialogBackUp.Filter = "Backup File (*.bak)|*.bak"; 
     saveFileDialogBackUp.Title = "File Location"; 

     try 
     { 
      saveFileDialogBackUp.InitialDirectory = AppDomain.CurrentDomain.BaseDirectory + @"Sauvegardes"; 
      if (saveFileDialogBackUp.ShowDialog() == DialogResult.OK) 
      { 
      SqlCommand cmd = new SqlCommand(@"BACKUP DATABASE [dbCPS] TO DISK = '" + 
      saveFileDialogBackUp.FileName + ".bak' WITH NOFORMAT, NOINIT, NAME = + 
      N'dbCPS-Full Database Backup', SKIP, NOREWIND, NOUNLOAD, STATS = 10 ", + 
      conn); 
       conn.Close(); 
       conn.Open(); 
       cmd.ExecuteNonQuery(); 
       conn.Close(); 
       MessageBox.Show("Backup Successful!", "CPS Backup", MessageBoxButtons.OK, MessageBoxIcon.Information); 
      }       
     } 
     catch(Exception error) 
     { 
      MessageBox.Show(error.ToString()); 
     } 
    } 

    private void restoreToolStripMenuItem_Click(object sender, EventArgs e) 
    { 
     openFileDialogBackUp.Filter = "Backup File (*.bak)|*.bak"; 
     openFileDialogBackUp.FileName = "CPS"; 
     openFileDialogBackUp.InitialDirectory = AppDomain.CurrentDomain.BaseDirectory + @"Sauvegardes"; 
     if (openFileDialogBackUp.ShowDialog() == DialogResult.OK) 
     { 
      //RestoreDatabase(conn, "dbCPS", openFileDialogBackUp.FileName); 

      using (SqlConnection connection = new SqlConnection(GlobalVar.connectionString)) 
      { 
       using (SqlCommand command = new SqlCommand(@"RESTORE DATABASE dbCPS FROM DISK = '" + openFileDialogBackUp.FileName + @"' WITH RECOVERY, MOVE 'dbCPS' TO 'C:\Users\admin\Desktop\New backup\dbCPS.mdf', MOVE 'dbCPS_log' TO 'C:\Users\admin\Desktop\New backup\dbCPS_Log.ldf', REPLACE", connection)) 
       { 
        connection.Open(); 
        // Add the parameters for the SelectCommand. 

        command.CommandType = CommandType.Text; 
        command.ExecuteNonQuery(); 
        MessageBox.Show("Database Restored", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information); 
        connection.Close(); 
       } 
      } 
     } 
    } 

Answer 1

你可以嘗試使用

public void BackupDatabase(String databaseName, String userName, 
     String password, String serverName, String destinationPath) 
{ 



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


} 

public void RestoreDatabase(String databaseName, String filePath, 
     String serverName, String userName, String password, 
     String dataFilePath, String logFilePath) 
{ 
    Restore sqlRestore = new Restore(); 

BackupDeviceItem deviceItem = new BackupDeviceItem(filePath, DeviceType.File); 
sqlRestore.Devices.Add(deviceItem); 
sqlRestore.Database = databaseName; 

ServerConnection connection = new ServerConnection(serverName, userName, password); 
Server sqlServer = new Server(connection); 

Database db = sqlServer.Databases[databaseName]; 
sqlRestore.Action = RestoreActionType.Database; 
String dataFileLocation = dataFilePath + databaseName + ".mdf"; 
String logFileLocation = logFilePath + databaseName + "_Log.ldf"; 
db = sqlServer.Databases[databaseName]; 
RelocateFile rf = new RelocateFile(databaseName, dataFileLocation); 

sqlRestore.RelocateFiles.Add(new RelocateFile(databaseName, dataFileLocation)); 
sqlRestore.RelocateFiles.Add(new RelocateFile(databaseName+"_log", logFileLocation)); 
sqlRestore.ReplaceDatabase = true; 
sqlRestore.Complete += new ServerMessageEventHandler(sqlRestore_Complete); 
sqlRestore.PercentCompleteNotification = 10; 
sqlRestore.PercentComplete += 
    new PercentCompleteEventHandler(sqlRestore_PercentComplete); 

sqlRestore.SqlRestore(sqlServer); 
db = sqlServer.Databases[databaseName]; 
db.SetOnline(); 
sqlServer.Refresh(); 
} 

替代

public static bool backup(string path, ref Exception _ex) 
     { 
      bool res = true; 
      try 
      { 
       path_to_save = path; 
       if (!Directory.Exists(path_to_save)) 
        Directory.CreateDirectory(path_to_save); 

       final_path = path_to_save + Guid.NewGuid().ToString() + ".bak"; 
       Server myServer = new Server("servername"); 
       Backup bkpDBFull = new Backup(); 
       /* Specify whether you want to back up database or files or log */ 
       bkpDBFull.Action = BackupActionType.Database; 
       Database myDatabase = myServer.Databases["yourdatabase"]; 
       /* Specify the name of the database to back up */ 
       bkpDBFull.Database = myDatabase.Name; 
       /* You can take backup on several media type (disk or tape), here I am 
       * using File type and storing backup on the file system */ 
       bkpDBFull.Devices.AddDevice(final_path, DeviceType.File); 


       bkpDBFull.BackupSetName = "yourdatabase database Backup"; 
       bkpDBFull.BackupSetDescription = "yourdatabase database - Full Backup"; 
       /* You can specify the expiration date for your backup data 
       * after that date backup data would not be relevant */ 
       bkpDBFull.ExpirationDate = DateTime.Today.AddDays(10); 

       /* You can specify Initialize = false (default) to create a new 
       * backup set which will be appended as last backup set on the media. You 
       * can specify Initialize = true to make the backup as first set on the 
       * medium and to overwrite any other existing backup sets if the all the 
       * backup sets have expired and specified backup set name matches with 
       * the name on the medium */ 
       bkpDBFull.Initialize = false; 

       /* Wiring up events for progress monitoring */ 
       bkpDBFull.PercentComplete += CompletionStatusInPercent; 
       bkpDBFull.Complete += Backup_Completed; 

       /* SqlBackup method starts to take back up 
       * You can also use SqlBackupAsync method to perform the backup 
       * operation asynchronously */ 
       bkpDBFull.SqlBackup(myServer); 
      } 
      catch (Exception ex) { res = false; _ex = ex; } 
      return res; 
     }