public void retOffLineMission(string fromUser, string toUser)
        {
            DataTable dt = sqlHelper.retMission(fromUser, toUser);

            if (dt != null && dt.Rows.Count >= 0)
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    DataRow   dr   = dt.Rows[i];
                    FileClass file = new FileClass();
                    file.IsSender            = false;
                    file.Operation           = OperationType.Download;
                    file.SendFileType        = SendFileType.OffLine;
                    file.FileId              = dr["fileid"].ToString();
                    file.IsContinue          = true;
                    file.FileName            = file.SaveFileName = dr["filename"].ToString();
                    file.ReceivePath         = dr["filePath"].ToString();
                    file.ReceiveSaveFileName = file.ReceivePath.Substring(file.ReceivePath.LastIndexOf('\\') + 1);
                    file.ReceiveDir          = file.ReceivePath.Substring(0, file.ReceivePath.LastIndexOf('\\'));
                    file.FileSize            = Convert.ToInt64(dr["fileSize"]);
                    this.AddProcessCotrol.Invoke(file, false);
                }
            }
        }