Question

我正在开发一个基本的winform应用程序，我想用c＃更改壁纸，图像未拉伸以适应屏幕尺寸的问题。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;

namespace DailyWallpaper
{
    class WallpaperChanger
    {
        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        private static extern Int32 SystemParametersInfo(
            UInt32 action, UInt32 uParam, String vParam, UInt32 winIni);

        private static readonly UInt32 SPI_SETDESKWALLPAPER = 0x14;
        private static readonly UInt32 SPIF_UPDATEINIFILE = 0x01;
        private static readonly UInt32 SPIF_SENDWININICHANGE = 0x02;

        public void SetWallpaper(String path)
        {
            SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, path, SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);
        }
    }
}

任何人都可以告诉我如何纠正这个错误，提前谢谢。

Answer 1

尝试执行以下代码：

public void SetWallpaper(String path)
    {
        RegistryKey key = Registry.CurrentUser.OpenSubKey(@"Control Panel\Desktop", true);
        key.SetValue(@"WallpaperStyle", 2.ToString());
        key.SetValue(@"TileWallpaper", 0.ToString());

        SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, path, SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);
    }

编辑：

您还可以修改您的功能并将样式传递给它：

public void SetWallpaper(String path, Style style)
    {
        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, path, SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);
    }

使用c＃更改壁纸样式

1 个答案: