使用C＃显示错误，恢复超过10MB大小的数据库

Question

我正在使用此命令使用C＃

恢复数据库

private void btn_restore_Click(object sender, EventArgs e)
{
        intializeConnections();
        intializeDataServer();

        if ((txt_bakfile.Text.ToString()!="") &&(txt_bakfile.Text !="System.Data.DataRow"))
        {
            Thread oThread = new Thread(new ThreadStart(frmWaitShow));
          //  clsLogs.LogEvent(4, "Tread is call");

            oThread.Start();
            // Create a new database restore operation
            Restore rstDatabase = new Restore();
            // Set the restore type to a database restore
            rstDatabase.Action = RestoreActionType.Database;
            // Set the database that we want to perform the restore on
            rstDatabase.Database = DatabaseName;

            // Set the backup device from which we want to restore, to a file
            BackupDeviceItem bkpDevice = new BackupDeviceItem(txt_bakfile.Text.ToString(), DeviceType.File);
            // Add the backup device to the restore type
            rstDatabase.Devices.Add(bkpDevice);
            // If the database already exists, replace it
            rstDatabase.ReplaceDatabase = true;
            // Perform the restore
            rstDatabase.SqlRestore(srvSql);
            oThread.Abort();  
        }
    }

功能是：

    public void intializeConnections()
    {
        string connString = SqlHelper.ConString;

        SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder(connString);
        serverName = builder.DataSource;
         DatabaseName = builder.InitialCatalog;
        UserId = builder.UserID;
        pw = builder.Password;

    }

    private void intializeDataServer()
    {

      // Create a new connection to the selected server name
        ServerConnection srvConn = new ServerConnection(serverName);
        // Log in using SQL authentication instead of Windows authentication
        srvConn.LoginSecure = false;
        // Give the login username
        srvConn.Login = UserId;
        // Give the login password
        srvConn.Password = pw;
        // Create a new SQL Server object using the connection we created
        srvSql = new Server(srvConn);
    }

这适用于我所有大小小于10MB的数据库，但是当我尝试恢复一个大小超过10MB的数据库时，它显示错误

  

服务器恢复失败＆＃39; VARUN-PC＆＃39;