GDI+ 中的一般错误发生在 Screen Capture 中 [英] Generic error in GDI+ occurs in Screen Capture

问题描述

我正在编写一个用于截屏的应用程序，但它会随机抛出 GDI+ 一般错误.不幸的是，一般错误并不能帮助我很好地调试.我的屏幕截图代码是:

I am writing an application that takes screen shots, but randomly it will throw a GDI+ generic error. Unfortunately, a generic error does not help me debug well. My code for the screen capture is:

    static void CaptureScreen()
    {
        bmpScreenshot = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb);
        // Create a graphics object from the bitmap
        gfxScreenshot = Graphics.FromImage(bmpScreenshot);
        // Take the screenshot from the upper left corner to the right bottom corner
        gfxScreenshot.CopyFromScreen(Screen.PrimaryScreen.Bounds.X, Screen.PrimaryScreen.Bounds.Y, 0, 0, Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy);
        // Save the screenshot to the specified path that the user has chosen
        bmpScreenshot.Save(savePath + "img" + times.ToString()+ ".png", ImageFormat.Png);
    }

偶尔会给我一个通用错误，所以我想也许我应该处理位图和图形变量"

Which will give me a generic error occasionally, so I thought "Maybe I should dispose the bitmap and graphics variable"

    static void CaptureScreen()
    {
        bmpScreenshot = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb);
        // Create a graphics object from the bitmap
        gfxScreenshot = Graphics.FromImage(bmpScreenshot);
        // Take the screenshot from the upper left corner to the right bottom corner
        gfxScreenshot.CopyFromScreen(Screen.PrimaryScreen.Bounds.X, Screen.PrimaryScreen.Bounds.Y, 0, 0, Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy);
        // Save the screenshot to the specified path that the user has chosen
        bmpScreenshot.Save(savePath + "img" + times.ToString()+ ".png", ImageFormat.Png);

        bmpScreenshot.Dispose();
        gfxScreenshot.Dispose();
    }

然后删除该文件:

            for (int i = 1; i == times; i++)
            {
                File.Delete(savePath + @"\img" + i.ToString() + ".png");
            }
            times = 0;

但是，如果您运行两次，则表示该文件正在使用中，如果您正在写入同一个文件.有任何想法吗?

But if you run that twice it says the file is in use, if you are writing to the same file. Any ideas?

推荐答案

以下内容可能会有所帮助:

The following might help:

using (bmpScreenshot = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb))
using (gfxScreenshot = Graphics.FromImage(bmpScreenshot))
{
    // Take the screenshot from the upper left corner to the right bottom corner
    gfxScreenshot.CopyFromScreen(Screen.PrimaryScreen.Bounds.X, Screen.PrimaryScreen.Bounds.Y, 0, 0, Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy);

    Bitmap bmpScreenshot2 = new Bitmap(bmpScreenshot); // FIX: Change "S" to "s"...
    // Save the screenshot to the specified path that the user has chosen
    bmpScreenshot2.Save(savePath + "img" + times.ToString()+ ".png", ImageFormat.Png);
}

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