CODEWITHSUNDEEP
jsonwindowsrestwindows-phone
user1279156
user1279156

Reputation: 35

Windows Phone WebClient Won't Update New Data

I have a windows phone app that connects to a local IIS Server. It downloads some json data and displays it in a list box. I also have a refresh button on the page. When the page loads everything is correct but pressing the refresh button only returns the same data that was available when the page is loaded. I have checked my web browser with the uri and the updated data shows there correctly. Also If I exit the windows phone app and reload it the data is there. Here is some dumbed down code I am testing with.

On page load:

        WebClient download = new WebClient();
        download.DownloadStringCompleted += new DownloadStringCompletedEventHandler(download_DownloadStringCompleted);
        download.DownloadStringAsync(new Uri("http://sampledata/data"));

        void download_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
        {
            MessageBox.Show(e.Result);
        }

This works fine and displays a message box with my json string.

On Refresh:

private void Button_Click(object sender, RoutedEventArgs e)
    {
        WebClient refresh = new WebClient();
        refresh.DownloadStringCompleted += new DownloadStringCompletedEventHandler(refresh_DownloadStringCompleted);
        refresh.DownloadStringAsync(new Uri("http://sampledata/data"));
    }

    void refresh_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
    {
        MessageBox.Show(e.Result);
    }

This displays the same json string that was displayed on page load even though the data has changed. Does anyone have any ideas? Thanks.

Upvotes: 0

Views: 643

Answers (2)

Hero
Hero

Reputation: 11

try adding a time stamp to the end of the URL. like refresh.DownloadStringAsync(new URI("http://sampledata/data" + DateTime.Now.ToString()));

Upvotes: 1

RandomBoy
RandomBoy

Reputation: 464

How much data do You pulling out from server? Try with HttpWebRequest if you need heavy lifting. I also had some issuses with webclient loading and refreshing data. Every change on server comes with big delay...

Upvotes: 0

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