小賢的部落格

x:TypeArguments 可定義泛型，目前測試只有WPF可以 WinRT無法用於建構子 

　　在MVVM的架構下，通常為了將事件及邏輯從View的code behind(.cs檔)中搬離，會使用到Command，不過Command的建置作業比傳統的事件較為麻煩，在參考Blend 的WPF資料繫結應用程式專案及Google之後，發現不需使用Command而且還能跟原本的事件相容，並且搬移到ViewModel中!

初始化

            Car car = new Car();
            car.root = new Root();
            car.root.list = new List();
            car.root.name = "海德格";
            car.root.data = "救我";
            for (int f = 0; f < 10; f++)
            {
                car.root.list.Add(f.ToString());
            }

class to json, then to xml

            FrameworkElementFactory wrapElement = new FrameworkElementFactory(typeof(WrapPanel));
            ItemsPanelTemplate itemPanelDataTemplate = new ItemsPanelTemplate(wrapElement);
            itemPanelDataTemplate.VisualTree = wrapElement;


            myListbox = new ListBox()
            {
                Opacity = 1,
                Visibility = System.Windows.Visibility.Visible,
                Height = double.NaN,
                Width = double.NaN,
                ItemsPanel = itemPanelDataTemplate,
                Background = null,
                Foreground = null,
                BorderBrush = null,
                VerticalAlignment = VerticalAlignment.Bottom,
                HorizontalAlignment = HorizontalAlignment.Center,
                Margin = new Thickness(0, 0, 30, 0)
            };

解決事件重複觸發的問題:

private void button2_Click(object sender, RoutedEventArgs e)
{
    WriteableBitmap writeableBitmap = new WriteableBitmap(bitmapImage);
    int startTime = Environment.TickCount;

    int width = bitmapImage.PixelWidth;
    int height = bitmapImage.PixelHeight;
    int stride = width * ((bitmapImage.Format.BitsPerPixel + 7) / 8);
    byte[] pixel = new byte[height * stride];
    
    writeableBitmap.CopyPixels(pixel, stride, 0);

    Parallel.For(0, height, y =>
    {
        int x;

        for (x = 0; x < stride; x++)
        {
            pixel[x + y * stride] = (byte)(255 - pixel[x + y * stride]);
        }
    });

    writeableBitmap.WritePixels(new Int32Rect(0, 0, width, height), pixel, stride, 0);
    image1.Source = writeableBitmap;

    this.Title =(Environment.TickCount - startTime) + " ms";

    //CroppedBitmap
}

　　這是WPF對影像做顏色反轉的程式，使用CopyPixels取得每一點的BGRA的byte array之後，用Parallel.For(平行For)進行反轉RGB顏色，然後用WritePixels把處理完後的BGRA array寫回去，然後使用image1顯示出來。