/// <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);
}
}
/// <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);
}
}
