CODEWITHSUNDEEP
c#multithreading
user5130773
user5130773

Reputation:

Pause and resume a download WPF

Hello I am working on a WPF platform targeting .NET framework 4.5.2. I am writing a downloader for my application. Here is the code:

private void Download(Dictionary<int, FileAndLinkClass> MyLinks)
    {
        ApplicationDownloadThread = new Thread(() =>
        {
            foreach (KeyValuePair<int, FileAndLinkClass> item in MyLinks)
            {
                fileNo++;
                WebClient myWebClient = new WebClient();
                myWebClient.DownloadProgressChanged += MyWebClient_DownloadProgressChanged;
                myWebClient.DownloadFileCompleted += MyWebClient_DownloadFileCompleted;
                // Download the Web resource and save it into the current filesystem folder.
                string downloadedFileAdress = System.IO.Path.Combine(fileLocation, $"{item.Value.FileName}");
                myWebClient.DownloadFileAsync(new Uri(item.Value.Link), downloadedFileAdress);
                while (myWebClient.IsBusy)
                {

                }
            }
        });

        ApplicationDownloadThread.IsBackground = false;
        ApplicationDownloadThread.Start();

        //UnZipAndCreateUpdatePackage(MyLinks);

    }

Now I want at button click the download must be paused and at another button click the download must be resumed. I tried working with .set() property of an AutoReset event and .Reset() property of the same but it didn't work. I need help. My button click code are:

    private AutoResetEvent waitHandle = new AutoResetEvent(true);

    private void StartDownloadBtn_Click(object sender, RoutedEventArgs e)
    {
        waitHandle.Set();

    }

    private void StopDownloadBtn_Click(object sender, RoutedEventArgs e)
    {
        waitHandle.Reset();

    }

I have also tried this link How to pause/suspend a thread then continue it?. nothing happens

I've also gone through Adding pause and continue ability in my downloader but I failed to incorporate the solution in my above code as I am also updating the download progress on the UI.

Upvotes: 6

Views: 1624

Answers (1)

iam.Carrot
iam.Carrot

Reputation: 5286

Well I did some more digging, apparently if for you Adding pause and continue ability in my downloader wasn't clear as the it uses byte stream data in the class. Maybe you could check out the link below, it also provides a VS solution on WPF for the downloading .zip file extensions with pause/resume/stop capabilities. Please let me know if you need some more help.

Link to CodeProject article: C# .NET Background File Downloader

Upvotes: 1

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