/// <summary>
/// Gets the wallpaper arrangement.
/// </summary>
/// <remarks>
/// This method returns <c>null</c> if the registry value is invalid or cannot be found.
/// </remarks>
/// <returns>
/// A <see cref="Nullable{WallpaperArrangement}" />? object representing the current
/// wallpaper arrangement. <c>null</c> if the registry value is invalid or cannot be found.
/// </returns>
/// <inheritdoc cref="GetWallpaperPath" />
public static WallpaperArrangement?GetWallpaperArrangement()
{
using (RegistryKey desktopRegKey =
Registry.CurrentUser.OpenSubKey(Desktop.ControlPanelDesktopRegistryKey, false)
) {
String wallpaperStyle = Desktop.GetRegString(desktopRegKey, Desktop.WallpaperStyleRegistryValue);
String wallpaperTile = Desktop.GetRegString(desktopRegKey, Desktop.WallpaperTileRegistryValue);
if (
(wallpaperStyle == null) || (wallpaperTile == null) ||
(wallpaperStyle.Length != 1) || (wallpaperTile.Length != 1))
{
return(null);
}
if (wallpaperTile[0] == '1')
{
return(WallpaperArrangement.Tile);
}
if (wallpaperStyle[0] == '1')
{
return(WallpaperArrangement.Center);
}
if (wallpaperStyle[0] == '2')
{
return(WallpaperArrangement.Stretch);
}
return(null);
}
}
/// <summary>
/// Gets the path of the active wallpaper.
/// </summary>
/// <remarks>
/// The path returned may also be empty or invalid.
/// <c>null</c> will be returned if the key or value doesn't exist or isn't of type String.
/// </remarks>
/// <returns>
/// A <see cref="String" /> representing the active wallpaper path.
/// <c>null</c> if the key or value doesn't exist or isn't of type string.
/// </returns>
/// <exception cref="SecurityException">
/// Missing framework access rights to read the registry key or its value.
/// Or missing windows access rights to read the registry key.
/// </exception>
/// <exception cref="UnauthorizedAccessException">
/// Missing Windows access rights to read the registry value.
/// </exception>
/// <permission cref="RegistryPermission">
/// for reading the registry key and value. Associated enumerations:
/// <see cref="RegistryPermissionAccess.Read">RegistryPermissionAccess.Read</see>.
/// </permission>
/// <permission cref="SecurityPermission">
/// for the ability to access the specified registry key, if it is a remote key.
/// Associated enumeration:
/// <see cref="SecurityPermissionFlag.UnmanagedCode">SecurityPermissionFlag.UnmanagedCode</see>.
/// </permission>
public static String GetWallpaperPath()
{
using (RegistryKey desktopRegKey =
Registry.CurrentUser.OpenSubKey(Desktop.ControlPanelDesktopRegistryKey, false)
) {
return(Desktop.GetRegString(desktopRegKey, Desktop.WallpaperPathRegistryValue));
}
}