c# - 更改桌面壁纸c#

Question

我想创建一个程序，将 bmp 图像文件保存在驱动程序上并将该图像设置为壁纸。我设法编写的代码将图像保存在正确的位置，但图像没有显示为壁纸。请帮忙...

class Program
{
    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    private static extern Int32 SystemParametersInfo(UInt32 uiAction, UInt32
    uiParam,String pvParam, UInt32 fWinIni);
    private static UInt32 SPI_SETDESKWALLPAPER = 20;
    private static UInt32 SPIF_UPDATEINIFILE = 0x1;
    private String imageFileName = "D:\\wall.bmp";


    static void Main(string[] args)
    {
        Bitmap bmp = new Bitmap(Properties.Resources.wall);
        bmp.Save("D:\\wall.bmp");
        SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, "D:\\wall.bmp", SPIF_UPDATEINIFILE);
    }





}

Answer 1

你可以尝试写这个类 Here :

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);
    }
}

祝你好运!