private static uint ToFileIconFlags(IconSize size, FileIconOptions options)
{
uint flags = NativeMethods.SHGFI_ICON;
switch (size)
{
case IconSize.Large:
flags |= NativeMethods.SHGFI_LARGEICON;
break;
case IconSize.Small:
flags |= NativeMethods.SHGFI_SMALLICON;
break;
case IconSize.ShellSize:
flags |= NativeMethods.SHGFI_SHELLICONSIZE;
break;
}
if ((options & FileIconOptions.LinkOverlay) == FileIconOptions.LinkOverlay)
{
flags |= NativeMethods.SHGFI_LINKOVERLAY;
}
if ((options & FileIconOptions.Selected) == FileIconOptions.Selected)
{
flags |= NativeMethods.SHGFI_SELECTED;
}
if ((options & FileIconOptions.OpenIcon) == FileIconOptions.OpenIcon)
{
flags |= NativeMethods.SHGFI_OPENICON;
}
if ((options & FileIconOptions.Overlays) == FileIconOptions.Overlays)
{
flags |= NativeMethods.SHGFI_ADDOVERLAYS;
}
if ((options & FileIconOptions.DoNotAccessFile) == FileIconOptions.DoNotAccessFile)
{
flags |= NativeMethods.SHGFI_USEFILEATTRIBUTES;
}
return(flags);
}
public static Icon GetFileIcon(string filePath, IconSize size = IconSize.Large, FileIconOptions options = 0, System.IO.FileAttributes attributes = System.IO.FileAttributes.Normal)
{
var flags = ToFileIconFlags(size, options);
var sfi = new UnsafeNativeMethods.SHFILEINFO();
IntPtr sysImageList = UnsafeNativeMethods.SHGetFileInfo(filePath, attributes, ref sfi, UnsafeNativeMethods.SHFILEINFO.Sizeof(), flags);
if (sysImageList == IntPtr.Zero)
{
throw new Win32Exception("SHGetFileIconInfo failed.");
}
if (sfi.hIcon == IntPtr.Zero)
{
throw new Win32Exception("SHGetFileIconInfo failed.");
}
return(HIconToIcon(sfi.hIcon));
}
