Winform打开文件所在目录并选中

在做一些导入导出功能时，一个打开文件所在目录并选中的功能是很人性化的。

代码如下：

/// <summary>
        /// 打开路径并定位文件...对于@"h:\Bleacher Report - Hardaway with the safe call ??.mp4"这样的，explorer.exe /select,d:xxx不认，用API整它
        /// </summary>
        /// <param name="filePath">文件绝对路径</param>
        [DllImport("shell32.dll", ExactSpelling = true)]
        private static extern void ILFree(IntPtr pidlList);

        [DllImport("shell32.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
        private static extern IntPtr ILCreateFromPathW(string pszPath);

        [DllImport("shell32.dll", ExactSpelling = true)]
        private static extern int SHOpenFolderAndSelectItems(IntPtr pidlList, uint cild, IntPtr children, uint dwFlags);

        public void ExplorerFile(string filePath)
        {
            if (!File.Exists(filePath) && !Directory.Exists(filePath))
                return;

            if (Directory.Exists(filePath))
                Process.Start(@"explorer.exe", "/select,\"" + filePath + "\"");
            else
            {
                IntPtr pidlList = ILCreateFromPathW(filePath);
                if (pidlList != IntPtr.Zero)
                {
                    try
                    {
                        Marshal.ThrowExceptionForHR(SHOpenFolderAndSelectItems(pidlList, 0, IntPtr.Zero, 0));
                    }
                    finally
                    {
                        ILFree(pidlList);
                    }
                }
            }
        }

调用如下：

if (File.Exists(path))
{
    ExplorerFile(path);
}

path是包含文件名的完整文件路径。