public async Task DownloadAsync()
{
EventHandler <ProgressUpdatedEventArgs> eventHandler = (sender, e) =>
{
this.DownloadMessage = e.Message;
this.DownloadProgress = e.Progress;
};
try
{
this.ClientState = ClientState.PrepareDownload;
_dataService.Progress.ProgressChanged += eventHandler;
var selectedDatasets = this.GetSelectedDatasets().Select(dataset => dataset.Model).ToList();
// security check
var projectIds = selectedDatasets.Select(dataset => dataset.Parent.Parent.Id).Distinct();
foreach (var projectId in projectIds)
{
if (!Utilities.IsProjectAccessible(_userIdService.User, projectId, _databaseManager.Database))
{
throw new UnauthorizedAccessException($"The current user is not authorized to access project '{projectId}'.");
}
}
//
var job = new ExportJob()
{
Owner = _userIdService.User.Identity.Name,
Parameters = this.ExportParameters
};
var exportJobService = _serviceProvider.GetRequiredService <JobService <ExportJob> >();
_exportJobControl = exportJobService.AddJob(job, _dataService.Progress, (jobControl, cts) =>
{
var task = _dataService.ExportDataAsync(this.ExportParameters,
selectedDatasets,
cts.Token);
return(task);
});
var downloadLink = await _exportJobControl.Task;
if (!string.IsNullOrWhiteSpace(downloadLink))
{
var fileName = downloadLink.Split("/").Last();
await _jsRuntime.FileSaveAs(fileName, downloadLink);
}
}
finally
{
_dataService.Progress.ProgressChanged -= eventHandler;
this.ClientState = ClientState.Normal;
this.DownloadMessage = string.Empty;
this.DownloadProgress = 0;
}
}
