Desktop Image changer is not working as a windows service!

Question

Hi,

 

I am working on an windows service application, which need to change the desktop of the machine for each 1 minute. 

 

For changing the desktop background I have used the below code and it is working from console application.

public sealed class Wallpaper

{

Wallpaper() { }

const int SPI_SETDESKWALLPAPER = 20;

const int SPIF_UPDATEINIFILE = 0x01;

const int SPIF_SENDWININICHANGE = 0x02;

[DllImport("user32.dll", CharSet = CharSet.Auto)]

static extern int SystemParametersInfo(int uAction, int uParam, string lpvParam, int fuWinIni);

public enum Style : int

{

Tiled,

Centered,

Stretched

}

public static void Set(Uri uri, Style style)

{

System.IO.Stream s = new System.Net.WebClient().OpenRead(uri.ToString());

System.Drawing.Image img = System.Drawing.Image.FromStream(s);

string tempPath = Path.Combine(Path.GetTempPath(), "wallpaper.bmp");

img.Save(tempPath, System.Drawing.Imaging.ImageFormat.Bmp);

RegistryKey key = Registry.CurrentUser.OpenSubKey(@"Control Panel\Desktop", true);

if (style == Style.Stretched)

{

key.SetValue(@"WallpaperStyle", 2.ToString());

key.SetValue(@"TileWallpaper", 0.ToString());

}

if (style == Style.Centered)

{

key.SetValue(@"WallpaperStyle", 1.ToString());

key.SetValue(@"TileWallpaper", 0.ToString());

}

if (style == Style.Tiled)

{

key.SetValue(@"WallpaperStyle", 1.ToString());

key.SetValue(@"TileWallpaper", 1.ToString());

}

SystemParametersInfo(SPI_SETDESKWALLPAPER,

0,

tempPath,

SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);

}

}

--------------------------------------------------------

But when I used the same code from the windows service application and calling it for every 1 Minute using a System.Timers.Timer class, it is not working(Background is not changing). It is not even throwing any error also.

 

Can any one help me in this please?

 

 

Thanks

Srinivas.