调用WriteableBitmap.WritePixels方法 [英] Calling the WriteableBitmap.WritePixels method

问题描述

我想打电话给WriteableBitmap.WritePixels方法，但我似乎无法理解的参数。
MSDN文章是很平淡（或者我shuold说......空？），我无法理解如何使用的方法。

I'm trying to call the WriteableBitmap.WritePixels method, but I can't seem to understand the parameters. The MSDN article is very dull (Or shuold I say... null?), and I couldn't understand how to use the method.

编辑：
我试图从这篇文章修改code：
<一href=\"http://msdn.microsoft.com/en-us/library/system.windows.media.imaging.writeablebitmap%28v=VS.90%29.aspx\">http://msdn.microsoft.com/en-us/library/system.windows.media.imaging.writeablebitmap%28v=VS.90%29.aspx

        PixelFormat pf = PixelFormats.Rgba128Float;
        WriteableBitmap wb = new WriteableBitmap(width * 5, height * 5, 100, 100, pf, new BitmapPalette(new List<Color> { Color.FromArgb(255, 255, 0, 0) }));
        byte[] ColorData = { 0, 0, 0, 0 };
        wb.WritePixels(new Int32Rect(0, 0, 1, 1), ColorData, 4, 0);
        Background.Source = wb;

在最后一行的调试声称，缓冲液（ColorData）大小不足以前行。

In the line before the last line the debugger claims that the buffer (ColorData) size is not sufficient.

EDIT2：
我又试了一次：

I tried again:

        void RefreshGraphics()
    {
        PixelFormat pf = PixelFormats.Pbgra32;
        WriteableBitmap wb = new WriteableBitmap(width * 5, height * 5, 100, 100, pf, new BitmapPalette(new List<Color> { Color.FromArgb(255, 255, 0, 0) }));
        byte[] ColorData = new byte[1000];
        byte t = 0;
        for (int i = 0; i < 1000; i++)
            ColorData[i] = t++;
        wb.WritePixels(new Int32Rect(0, 0, 10, 10), ColorData, 10, 0);
        Background.Source = wb;
    }

现在一个值是不是在预期的范围。
堆栈跟踪不会告诉哪一个...

Now a "Value is is not in the expected range." The stackTrace doesn't tell which one...

修改3：
问题解决了！
不知道如何或为何，但code ++工程，（我害怕改变吧...）

Edit 3: Problem Solved! Don't know how or why, but the code works (And I afraid to change it...)

推荐答案

检查高度和宽度的数值。也许字节数组是根本不够大！

Check the values of height and width. Perhaps the byte array is simply not big enough!

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