xaml - OpenFileDialog in SilverLight? -

i have download code openfiledialog (file upload function) silverlight tutorials website. creating silverlight application using esri api , incorporate file upload functionality in it. have replicated exact code in application there no errors when run it, reason application dosen't execute line of code "c.openwriteasync(ub.uri)"

edit 2: notice thing when upgraded general handler (receiver.ashx) downloaded has following first line while generic handler doesn't

<%@ webhandler language="c#" class="receiver" %> dont know why code dosent trigger :(

here code

using system; using system.collections.generic; using system.linq; using system.net; using system.windows; using system.windows.browser; using system.windows.controls; using system.windows.documents; using system.windows.input; using system.windows.media; using system.windows.media.animation; using system.windows.markup; using system.windows.shapes; using system.componentmodel; using esri.arcgis.client; using system.windows.controls.primitives; using system.io; using system.io.isolatedstorage;   namespace datatool {   public partial class mainpage : usercontrol   {   public mainpage()   {   initializecomponent();   loaded += new routedeventhandler(mainpage_loaded);   }    void mainpage_loaded(object sender, routedeventargs e)   {    // htmlpage.registerscriptableobject("silverlightlearn", this);   }    [scriptablemember]   private void btnservice_click(object sender, routedeventargs e)   {   }    private void btnupload_click(object sender, routedeventargs e)   {   openfiledialog dialog = new openfiledialog();   dialog.multiselect = false;   dialog.filter = "all files|*.*";    bool? selfil = dialog.showdialog();    if (selfil != null && selfil == true)   {   string selectedfilename = dialog.file.name;   uploadfile(selectedfilename, dialog.file.openread());    }   else   {   //do else   }   }   private void storeiso(string filename, stream data)   {    }    private void uploadfile(string filename, system.io.stream data)   {    // webclient wbc = new webclient();   uribuilder ub = new uribuilder("http://localhost:63461/datatool/datareceiver.ashx");   ub.query = string.format("filename={0}", filename);    webclient c = new webclient();   c.openwritecompleted += (sender, e) =>   {   pushdata(data, e.result);   e.result.close();   data.close();   };   c.openwriteasync(ub.uri);   }   private void pushdata(stream input, stream output)   {    byte[] buffer = new byte[4096];   int bytesread;    while ((bytesread = input.read(buffer, 0, buffer.length)) != 0)   {   output.write(buffer, 0, bytesread);   }    }    } } 

here datareceiver.ashx code

using system; using system.collections.generic; using system.linq; using system.web; using system.io;  namespace datatool.web {   /// <summary>   /// summary description datareceiver   /// </summary>   public class datareceiver : ihttphandler   {    public void processrequest(httpcontext context)   {   string filename = context.request.querystring["filename"].tostring();    using (filestream fs = file.create(context.server.mappath("~/app_data/" + filename)))   {   savefile(context.request.inputstream, fs);   }    }   public void savefile(stream st, filestream fs)   {   byte[] buffer = new byte[4096];   int bytesread;    while ((bytesread = st.read(buffer, 0, buffer.length)) != 0)   {   fs.write(buffer, 0, bytesread);   }   }    public bool isreusable   {     {   return false;   }   }   } } 

i have gone through downloaded sample code , code step step , found code dosent execute openwriteasync statement. downloaded code in .net 3.5 or 3.0 framework , upgraded 4.0.

edit: please find sample here https://rapidshare.com/files/459667631/testing.zip

this simple , check following code

openfiledialog dlg = new openfiledialog(); dlg.filter = "text files (*.txt)|*.txt"; if (dlg.showdialog() == dialogresult.ok) {     using (streamreader reader = dlg.selectedfile.opentext())          // store file content in 'text' variable         string text = reader.readtoend();     } }   c# example 2: copy files application's isolated storage.   using system.windows.controls; using system.io; using system.io.isolatedstorage; ...  openfiledialog dlg = new openfiledialog(); dlg.filter = "all files (*.*)|*.*"; dlg.enablemultipleselection = true; if (dlg.showdialog() == dialogresult.ok) {     // save selected files application's isolated storage     isolatedstoragefile iso = isolatedstoragefile.getuserstoreforapplication();     foreach (filedialogfileinfo file in dlg.selectedfiles) {         using (stream filestream = file.openread()) {             using (isolatedstoragefilestream isostream =                 new isolatedstoragefilestream(file.name, filemode.create, iso)) {                  // read , write data block block until finish                 while(true) {                     byte[] buffer = new byte[100001];                     int count = filestream.read(buffer, 0, buffer.length);                     if (count > 0) {                         isostream.write(buffer, 0, count);                     }                     else {                         break;                     }                 }             }          }     } }