需求
需要把其他执行文件的ICON读取出来,然后在程序中显示。
实现
class ExtractIcon { public static Bitmap GetBitmapFromExeIcon(string path) { return GetBitmap(GetIconFromExe(path)); } public static Icon GetIconFromExe(string path) { return GetIconFromExe(path, true); } //http://www.pinvoke.net/default.aspx/shell32/ExtractIconEx.html public static Icon GetIconFromExe(string path, bool large) { IntPtr hLargeIcon = IntPtr.Zero; IntPtr hSmallIcon = IntPtr.Zero; ExtractIconEx(path, 0, ref hLargeIcon, ref hSmallIcon, 1); if (large) { return (Icon)Icon.FromHandle(hLargeIcon).Clone(); } else { return (Icon)Icon.FromHandle(hSmallIcon).Clone(); } } //http://social.msdn.microsoft.com/Forums/en-US/netfxcompact/thread/e765775c-a5b5-493f-baeb-3eaee1d41cef public static Bitmap GetBitmap(Icon icon) { Bitmap bmp = new Bitmap(icon.Width, icon.Height); //Create temporary graphics Graphics gxMem = Graphics.FromImage(bmp); //Draw the icon gxMem.DrawIcon(icon, 0, 0); //Clean up gxMem.Dispose(); return bmp; } //http://msdn.microsoft.com/en-us/library/aa922154.aspx [DllImport("coredll.dll", SetLastError = true)] private static extern IntPtr ExtractIconEx(string fileName, int index, ref IntPtr hIconLarge, ref IntPtr hIconSmall, uint nIcons); }
MS提供了函数可以取出执行文件的大小Ico图标信息。第三个参数为大图标,第四个参数为小图标。
由于Icon对象不能直接在Graphics上画,所以需要转换成Bitmap,但是Compact Framework又不支持Icon.Save(),所以实现了一个Bitmap GetBitmap(Icon icon) 函数。
效果图如下,取出word的图标。
第二个图去掉ico背景