Exemple #1
0
        /// <summary>
        ///     Returns the associated icon of a <paramref name="fileExtension" />.
        /// </summary>
        /// <param name="fileExtension">The file extension to get the associated icon for.</param>
        /// <returns>The associated icon of the <paramref name="fileExtension" />.</returns>
        public static Icon GetFileIcon(string fileExtension)
        {
            if (string.IsNullOrWhiteSpace(fileExtension))
            {
                throw new ArgumentNullException(nameof(fileExtension));
            }

            var shfileinfo = new NativeMethods.Shfileinfo();
            const NativeMethods.ShGetFileInfoFlags flags =
                NativeMethods.ShGetFileInfoFlags.TypeName |
                NativeMethods.ShGetFileInfoFlags.DisplayName |
                NativeMethods.ShGetFileInfoFlags.Icon |
                NativeMethods.ShGetFileInfoFlags.SysIconIndex |
                NativeMethods.ShGetFileInfoFlags.UseFileAttributes |
                NativeMethods.ShGetFileInfoFlags.SmallIcon;

            var hIcon = IntPtr.Zero;

            try
            {
                hIcon = NativeMethods.SHGetFileInfo(fileExtension, 0, ref shfileinfo, Marshal.SizeOf(shfileinfo),
                                                    flags);
                if (hIcon == IntPtr.Zero)
                {
                    return(null);
                }

                return((Icon)Icon.FromHandle(shfileinfo.hIcon).Clone());
            }
            finally
            {
                NativeMethods.DestroyIcon(hIcon);
            }
        }
Exemple #2
0
        /// <summary>
        ///     Returns the associated icon of a <paramref name="fileExtension" />.
        /// </summary>
        /// <param name="fileExtension">The file extension to get the associated icon for.</param>
        /// <returns>The associated icon of the <paramref name="fileExtension" />.</returns>
        public static Icon GetFileIcon(string fileExtension)
        {
            if (String.IsNullOrWhiteSpace(fileExtension))
                throw new ArgumentNullException("fileExtension");

            var shfileinfo = new NativeMethods.Shfileinfo();
            const NativeMethods.ShGetFileInfoFlags flags =
                NativeMethods.ShGetFileInfoFlags.TypeName |
                NativeMethods.ShGetFileInfoFlags.DisplayName |
                NativeMethods.ShGetFileInfoFlags.Icon |
                NativeMethods.ShGetFileInfoFlags.SysIconIndex |
                NativeMethods.ShGetFileInfoFlags.UseFileAttributes |
                NativeMethods.ShGetFileInfoFlags.SmallIcon;

            var hIcon = IntPtr.Zero;

            try
            {
                hIcon = NativeMethods.SHGetFileInfo(fileExtension, 0, ref shfileinfo, Marshal.SizeOf(shfileinfo), flags);
                if (hIcon == IntPtr.Zero)
                    return null;

                return (Icon) Icon.FromHandle(shfileinfo.hIcon).Clone();
            }
            finally
            {
                NativeMethods.DestroyIcon(hIcon);
            }
        }