Beispiel #1
0
            private string DownloadQueryResults(string sourceUrl)
            {
                if (!string.IsNullOrEmpty(sourceUrl))
                {
                    string    tempZipDir  = Path.Combine(Path.GetTempPath(), Path.GetFileNameWithoutExtension(Path.GetRandomFileName()));
                    string    tempZipFile = tempZipDir + ".zip";
                    WebClient webClient   = null;
                    bool      canceled    = false;
                    try
                    {
                        webClient = new WebClient();
                        bool downloadCompleted = false;
                        webClient.DownloadProgressChanged +=
                            delegate(object sender, DownloadProgressChangedEventArgs e)
                        {
                            string msg;
                            if (IsCancelRequested())
                            {
                                OnCancelRequested();
                                if (!canceled)
                                {
                                    webClient.CancelAsync();
                                }
                                canceled = true;
                                return;
                            }

                            if (e.BytesReceived < 1000 * 1024)
                            {
                                msg = string.Format("Retrieving images ({0:0.00}KB)", ((float)e.BytesReceived) / 1024);
                            }
                            else
                            {
                                msg = string.Format("Retrieving images ({0:0.00}MB)", ((float)e.BytesReceived) / 1000 / 1024);
                            }

                            OnProgressUpdated(msg);
                            //OnResultUpdated(Result);
                        };
                        webClient.DownloadFileCompleted +=
                            delegate(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
                        {
                            downloadCompleted = true;
                        };
                        webClient.DownloadFileAsync(new Uri(sourceUrl), tempZipFile);
                        //webClient.DownloadFile(sourceUrl, tempZipFile);

                        while (!downloadCompleted)
                        {
                            System.Threading.Thread.Sleep(500);
                        }

                        if (IsCancelRequested())
                        {
                            OnCancelRequested();
                            canceled = true;
                        }

                        if (!canceled)
                        {
                            OnProgressUpdated("Processing received images");
                            //Result.ProgressMessage = "Processing received images";
                            //OnResultUpdated(Result);

                            try
                            {
                                ZipUtil.UnZipFiles(tempZipFile, tempZipDir, "", false, true);
                                File.Delete(tempZipFile);
                            }
                            catch (Exception ex)
                            {
                                Platform.Log(LogLevel.Error, "Error processing received images", ex);
                                OnError("Error processing received images");
                                return(null);
                            }

                            return(tempZipDir);
                        }
                    }
                    finally
                    {
                        if (webClient != null)
                        {
                            webClient.Dispose();
                        }
                    }
                }
                return(null);
            }
        private string DownloadQueryResults(string sourceUrl, IBackgroundTaskContext context)
        {
            if (!string.IsNullOrEmpty(sourceUrl))
            {
                string tempZipDir = System.IO.Path.Combine(System.IO.Path.GetTempPath(),
                                                           System.IO.Path.GetFileNameWithoutExtension(System.IO.Path.GetRandomFileName()));
                string    tempZipFile = tempZipDir + ".zip";
                WebClient webClient   = null;
                bool      canceled    = false;
                try
                {
                    webClient = new WebClient();
                    bool downloadCompleted = false;
                    webClient.DownloadProgressChanged +=
                        delegate(object sender, DownloadProgressChangedEventArgs e)
                    {
                        if (context != null)
                        {
                            string progressMsg;

                            if (e.BytesReceived < 1000 * 1024)
                            {
                                progressMsg = string.Format("Retrieving images ({0:0.00}KB)", ((float)e.BytesReceived) / 1024);
                            }
                            else
                            {
                                progressMsg = string.Format("Retrieving images ({0:0.00}MB)", ((float)e.BytesReceived) / 1000 / 1024);
                            }
                            BackgroundTaskProgress progress = new BackgroundTaskProgress(1, 3, progressMsg);
                            context.ReportProgress(progress);
                            if (context.CancelRequested)
                            {
                                if (!canceled)
                                {
                                    webClient.CancelAsync();
                                }
                                context.Cancel();
                                canceled = true;
                            }
                        }
                    };
                    webClient.DownloadFileCompleted +=
                        delegate(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
                    {
                        downloadCompleted = true;
                    };
                    webClient.DownloadFileAsync(new Uri(sourceUrl), tempZipFile);
                    //webClient.DownloadFile(sourceUrl, tempZipFile);

                    while (!downloadCompleted)
                    {
                        System.Threading.Thread.Sleep(500);
                    }

                    if (!canceled)
                    {
                        if (context != null)
                        {
                            BackgroundTaskProgress progress = new BackgroundTaskProgress(1, 3, "Processing received images");
                            context.ReportProgress(progress);
                            if (context.CancelRequested)
                            {
                                context.Cancel();
                                canceled = true;
                            }
                        }
                        ZipUtil.UnZipFiles(tempZipFile, tempZipDir, "", false, true);

                        try
                        {
                            File.Delete(tempZipFile);
                        }
                        catch (Exception)
                        {
                        }

                        return(tempZipDir);
                    }
                }
                finally
                {
                    if (webClient != null)
                    {
                        webClient.Dispose();
                    }
                }
            }
            return(null);
        }