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POIssues Regarding UI Block in Windows 8 App
 

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  1. POIssues Regarding UI Block in Windows 8 App
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    <p>i am developing an app in which i ant to do some work in background and in the the ui the the timer should run like starts in 3 2 1 and then by that time my manipulation will be completed . but the issue is that is that even my methods are async my UI is getting blocked.</p> <p>my code is </p> <pre><code>private async void Page_Loaded(object sender, RoutedEventArgs e) { Task&lt;WriteableBitmap&gt; transparentbordertemp = Render("tilenew.png"); Task&lt;WriteableBitmap&gt; transparentbitmaptemp = Render("greenpattern.png"); if (GameSettingData.mainimageselected == null) { bitmapimagemain = await Render("puzzleimage.png"); bitmapimagemain = bitmapimagemain.Resize(550, 550, WriteableBitmapExtensions.Interpolation.Bilinear); puzzleimage.Source = bitmapimagemain; GameSettingData.mainimageselected = bitmapimagemain; } else { bitmapimagemain = GameSettingData.mainimageselected; bitmapimagemain = bitmapimagemain.Resize(550, 550, WriteableBitmapExtensions.Interpolation.Bilinear); puzzleimage.Source = bitmapimagemain; } height = (puzzleimage.Parent as Grid).ActualHeight + 15; width = (puzzleimage.Parent as Grid).ActualWidth - 25; double startx = 0; double starty = 0; heightpiece = 546 / numberofrows; widhpiece = 550 / numberofrows; animationgrid.Height = heightpiece + 100; animationgrid.Width = widhpiece + 100; Rect rectangle; int counter = 0; WriteableBitmap transparentborder = new WriteableBitmap(330, 330); finalbitmapimage = bitmapimagemain; finalbitmapimage = finalbitmapimage.Resize(330 * numberofrows, 330 * numberofrows, WriteableBitmapExtensions.Interpolation.Bilinear); int blithelpx = 0; int blithelpy = 0; for (int i = 0; i &lt; numberofrows; i++) { for (int j = 0; j &lt; numberofrows; j++) { imagepeices = new Image(); imagepeices.Height = bitmapimagemain.PixelHeight / (2 * numberofrows); imagepeices.Width = bitmapimagemain.PixelWidth / (2 * numberofrows); imagepeices.Stretch = Stretch.Uniform; counter++; imagepeices.Tag = counter; startx = j * bitmapimagemain.PixelWidth / numberofrows; starty = i * bitmapimagemain.PixelHeight / numberofrows; rectangle = new Rect(startx, starty, bitmapimagemain.PixelWidth / numberofrows, bitmapimagemain.PixelHeight / numberofrows); WriteableBitmap bitmapimagemain1 = bitmapimagemain.Crop(rectangle).Resize(330, 330, WriteableBitmapExtensions.Interpolation.Bilinear); // transparentborder = await Render("tilenew.png"); transparentborder = await transparentbordertemp; transparentborder = transparentborder.Resize(330, 330, WriteableBitmapExtensions.Interpolation.Bilinear); final = new WriteableBitmap(transparentborder.PixelWidth, transparentborder.PixelHeight); final.Blit(new Rect(0, 0, (int)bitmapimagemain1.PixelWidth, (int)bitmapimagemain1.PixelHeight), bitmapimagemain1, new Rect(0, 0, (int)bitmapimagemain1.PixelWidth, (int)bitmapimagemain1.PixelHeight), WriteableBitmapExtensions.BlendMode.Additive); final.Blit(new Rect(0, 0, (int)transparentborder.PixelWidth, (int)transparentborder.PixelHeight), transparentborder, new Rect(0, 0, (int)transparentborder.PixelWidth, (int)transparentborder.PixelHeight), WriteableBitmapExtensions.BlendMode.Additive); final = final.Resize((int)widhpiece, (int)widhpiece, WriteableBitmapExtensions.Interpolation.Bilinear); imagepeices.Source = final; imagepeices.PointerPressed += ImagePointerPressed; imagepeices.PointerReleased += ImagePointerReleased; imagepeices.VerticalAlignment = Windows.UI.Xaml.VerticalAlignment.Top; imagepeices.HorizontalAlignment = Windows.UI.Xaml.HorizontalAlignment.Left; listimages.Add(imagepeices); bitmaplist.Add(bitmapimagemain.Crop(rectangle)); margin += 20; gridpieces.Children.Add(imagepeices); finalbitmapimage.Blit(new Rect(blithelpx, blithelpy, (int)transparentborder.PixelWidth, (int)transparentborder.PixelHeight), transparentborder, new Rect(0, 0, (int)transparentborder.PixelWidth, (int)transparentborder.PixelHeight), WriteableBitmapExtensions.BlendMode.Additive); blithelpx += 330; } blithelpx = 0; blithelpy += 330; } foreach (Image item in listimages) { var a = (item.Parent as Grid).ActualHeight; var b = (item.Parent as Grid).ActualWidth; var x = rand.Next(50, 250); var y = rand.Next(100, 400); transformpoints.Add(new Point(x, y)); TranslateTransform posTransform = new TranslateTransform(); posTransform.X = x; posTransform.Y = y; item.RenderTransform = posTransform; } newgrid = new Grid(); RowDefinition[] rows = new RowDefinition[numberofrows]; ColumnDefinition[] columns = new ColumnDefinition[numberofrows]; for (int q = 0; q &lt; numberofrows; q++) { columns[q] = new ColumnDefinition(); columns[q].Width = new GridLength(1, GridUnitType.Star); newgrid.ColumnDefinitions.Add(columns[q]); } for (int t = 0; t &lt; numberofrows; t++) { rows[t] = new RowDefinition(); rows[t].Height = new GridLength(1, GridUnitType.Star); newgrid.RowDefinitions.Add(rows[t]); } int counter1 = 0; startx = 0; starty = 0; counter = 0; for (int p = 0; p &lt; numberofrows; p++) { for (int u = 0; u &lt; numberofrows; u++) { counter1++; Grid qwe = new Grid() { Name = "asd" + counter1.ToString(), Tag = counter1, Margin = new Thickness(0, 0, 0, 0) }; Image transparentimage = new Image(); transparentimage.Stretch = Stretch.Uniform; WriteableBitmap transparentbitmap = await transparentbitmaptemp; transparentbitmap = transparentbitmap.Resize(330, 330, WriteableBitmapExtensions.Interpolation.Bilinear); Image imageblur = new Image(); imageblur.Stretch = Stretch.Uniform; imageblur.Source = transparentbitmap; imageblur.Height = transparentbitmap.PixelHeight; imageblur.Width = transparentbitmap.PixelWidth; if (u == 0) { imageblur.Margin = new Thickness(10, 0, -20, 1); } else if (u == numberofrows - 1) { imageblur.Margin = new Thickness(0, 0, 0, 1); } else { if (u == 1) { imageblur.Margin = new Thickness(0, 0, -13, 1); } else { imageblur.Margin = new Thickness(-13, 0, -13, 1); } } transparentimage.Source = final; qwe.Height = heightpiece; qwe.Width = widhpiece; qwe.Children.Add(imageblur); qwe.Opacity = .6; Grid.SetColumn(qwe, u); Grid.SetRow(qwe, p); newgrid.Children.Add(qwe); } } newgrid.Margin = new Thickness(10, 0, 10, 0); imagegrid.Children.Add(newgrid); puzzleimage.Source = finalbitmapimage; disabletopbar = 0; initialcountdowngrid.Visibility = Windows.UI.Xaml.Visibility.Collapsed; imagegrid.Opacity = 1; gridpieces.Opacity = 1; dispatchertimer.Start(); } </code></pre> <p>and my render method is </p> <pre><code>private async Task&lt;WriteableBitmap&gt; Render(string filename) { var Assets = await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFolderAsync("JumblerGame"); var folder = await Assets.GetFolderAsync("Images"); StorageFile file1 = await folder.GetFileAsync(filename); BitmapImage i1 = new BitmapImage(); using (IRandomAccessStream strm = await file1.OpenReadAsync()) { i1.SetSource(strm); } WriteableBitmap img1 = new WriteableBitmap(i1.PixelWidth, i1.PixelHeight); using (IRandomAccessStream strm = await file1.OpenReadAsync()) { img1.SetSource(strm); } return img1; } </code></pre> <p>and in my on navigation i have started a timer on the ui but the timer does not start untill this async method is executed.</p> <p>i dont understand why ...</p>
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    1. This table or related slice is empty.
    1. COCan you show us the timer?
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      1. POIssues Regarding UI Block in Windows 8 App
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    2. COdispatchertimernew.Interval = TimeSpan.FromSeconds(1); dispatchertimernew.Tick += dispatchertimernew_Tick; dispatchertimernew.Start(); if (intialcounter == 1) { InitialCountDown = "Go"; disabletopbar = 0; dispatchertimernew.Stop(); initialcountdowngrid.Visibility = Windows.UI.Xaml.Visibility.Collapsed; imagegrid.Opacity = 1; gridpieces.Opacity = 1; dispatchertimer.Start(); } intialcounter--;
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      1. POIssues Regarding UI Block in Windows 8 App
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    3. COwhere is it being called?
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      1. POIssues Regarding UI Block in Windows 8 App
      1. USdcastro
 

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