C#中如何取得并使用Windows系统图标

在系统弹出对话框中往往带有Information、Question、Warnning、Error等系统图标，由于这些图标是系统自带的，所以可以为我们自己程序所用。

System.Drawing命名空间中有一个SystemIcons类，以静态属性方式提供了使用系统图标的便捷途径：

Public Properties

	Name	Description
	Application	Gets an Icon object that contains the default application icon (WIN32: IDI_APPLICATION).
	Asterisk	Gets an Icon object that contains the system asterisk icon (WIN32: IDI_ASTERISK).
	Error	Gets an Icon object that contains the system error icon (WIN32: IDI_ERROR).
	Exclamation	Gets an Icon object that contains the system exclamation icon (WIN32: IDI_EXCLAMATION).
	Hand	Gets an Icon object that contains the system hand icon (WIN32: IDI_HAND).
	Information	Gets an Icon object that contains the system information icon (WIN32: IDI_INFORMATION).
	Question	Gets an Icon object that contains the system question icon (WIN32: IDI_QUESTION).
	Warning	Gets an Icon object that contains the system warning icon (WIN32: IDI_WARNING).
	WinLogo	Gets an Icon object that contains the Windows logo icon (WIN32: IDI_WINLOGO).

 

需要注意的是，它是属于System.Drawing命名空间的，就是说它是GDI+的函数。

要在WPF中使用系统图标也是一件非常困难的事，微软提供了WPF的矢量绘图系统，可是它与传统的GDI、GDI+之间的转换并不是很全面和便利，要为WPF中的Image控件的Source指定图片数据源，你需要使用System.Windows.Interop下的Imaging来做转换：

Icon icon = System.Drawing.SystemIcons.Information;

BitmapSource source1 = Imaging.CreateBitmapSourceFromHIcon(icon.Handle,new Int32Rect(0,0,32,32), BitmapSizeOptions.FromWidth(32));