private void LoadList(string filename, bool suppressError = false)
        {
            int i = 0;
            ObservableCollection <JobDownloadViewModel> batchJob = null;

            if (filename.ToLower().EndsWith("txt"))
            {
                batchJob = new ObservableCollection <JobDownloadViewModel>();
                LoadTxt(filename, batchJob);
            }
            else if (filename.ToLower().EndsWith("xml"))
            {
                batchJob = LoadXml(filename, batchJob);
            }

            if (batchJob != null)
            {
                foreach (var item in batchJob)
                {
                    if (!ViewData.Contains(item, new JobDownloadViewModelComparer()))
                    {
                        ViewData.Add(item);
                        ++i;
                    }
                }
            }
            if (i == 0 && !suppressError)
            {
                ModernDialog.ShowMessage(string.Format("No job loaded from {0}{1}Either the jobs already loaded or no job in the file.", filename, Environment.NewLine), "Batch Job Loading", MessageBoxButton.OK);
            }
        }
        private void AddJob(JobDownloadViewModel newJob)
        {
            var ok = true;

            if (newJob.JobType == JobType.Tags)
            {
                if (String.IsNullOrWhiteSpace(newJob.SearchTag))
                {
                    ModernDialog.ShowMessage("Query String cannot be empty!", "Error", MessageBoxButton.OK);
                    ok = false;
                }
            }
            else if (newJob.JobType == JobType.Image)
            {
                if (newJob.ImageId <= 0)
                {
                    ModernDialog.ShowMessage("Image ID must be larger than 0!", "Error", MessageBoxButton.OK);
                    ok = false;
                }
            }
            else if (newJob.JobType == JobType.Member)
            {
                if (newJob.MemberId <= 0)
                {
                    ModernDialog.ShowMessage("Member ID must be larger than 0!", "Error", MessageBoxButton.OK);
                    ok = false;
                }
            }

            if (ok)
            {
                if (ViewData.Contains(newJob, new JobDownloadViewModelComparer()))
                {
                    MessageBox.Show("Job already exists", "Add Job Warning", MessageBoxButton.OK);
                }
                else
                {
                    ViewData.Add(newJob);
                    if (_jobRunner.BatchStatus == JobStatus.Running)
                    {
                        _jobRunner.DoJob(newJob, cancelToken);
                        newJob.PauseEvent.Set();
                        MainWindow.Log.Debug(String.Format("Add job {0} in running state.", newJob.Name));
                    }
                    else if (_jobRunner.BatchStatus == JobStatus.Paused)
                    {
                        newJob.Pause();
                        _jobRunner.DoJob(newJob, cancelToken);
                        MainWindow.Log.Debug(String.Format("Add job {0} in paused state.", newJob.Name));
                    }
                }
            }
        }