c# - WinRT - Update Progress Bar -

i got problem when doing animation progressbar.

my objective is, i want progressbar.value update every time process copyasync , createfolderasync.

i have 4 components in xaml file update every time process done (copyasync , createfolderasync), textblock running fine, update every time process done. problem in progressbar update ui in end of process.

i'm using dispatcher.runasync, , update process textblock , progressbar put in there.

please advise, how update progressbar code below.

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mainpage.xaml

<textblock text="files:" fontsize="72" margin="363,270,834,402"></textblock> <textblock text="folders:" fontsize="72" margin="273,411,834,270"></textblock> <textblock x:name="files" fontsize="72" margin="582,270,609,402"></textblock> <textblock x:name="folders" fontsize="72" margin="582,411,588,270"></textblock> <progressbar x:name="folderbar" height="25" margin="10,532,-10,211"></progressbar> <progressbar x:name="filebar" height="25" margin="10,565,-10,178"></progressbar> 

mainpage.xaml.cs

private async void copyfolder(string path) {     istoragefolder destination = applicationdata.current.localfolder;     istoragefolder root = package.current.installedlocation;      if (path.equals(root) && !await folderexistasync(root))         await destination.createfolderasync(root);      destination = await destination.getfolderasync(path);     root = await root.getfolderasync(path);      ireadonlylist<istorageitem> items = await root.getitemsasync();      // count total files     if (path.equals(root))         totalfiles(path);      foreach (istorageitem item in items)     {         if (item.gettype() == typeof(storagefile))         {             istoragefile presfile = await storagefile.getfilefromapplicationuriasync(                 new uri("ms-appx:///" + path.replace("\\", "/") + "/" + item.name));              if (!await fileexistasync(path, item.name))             {                 istoragefile copyfile = await presfile.copyasync(destination);                 countfiles++;                  if (copyfile != null)                 {                     await dispatcher.runasync(windows.ui.core.coredispatcherpriority.normal,                         () =>                         {                             // update textblock fine                             files.text = countfiles.tostring();                             // progressbar update in end of process                             filebar.value = countfiles / totalfiles * 100;                         });                 }              }         }         else         {             if (!await folderexistasync(path + "\\" + item.name))             {                 storagefolder createfolder = await destination.createfolderasync(item.name);                 countfolders++;                  if (createfolder != null)                 {                     await dispatcher.runasync(windows.ui.core.coredispatcherpriority.normal,                         () =>                         {                             // update textblock fine                             folders.text = countfolders.tostring();                             // progressbar update in end of process                             folderbar.value = countfolders / totalfolders * 100;                         });                 }              }              copyfolder(path + "\\" + item.name);         }     }  } 

countfiles , totalfiles both integers, when divide 1 other, performs integer division; since totalfiles greater or equal countfiles, result 0, except @ end it's 1.

to fix it, need cast double before divide, in order perform floating point division:

filebar.value = (double)countfiles / totalfiles * 100;