c#获取windows桌面背景代码示例

#region 获取windows桌面背景
        [system.runtime.interopservices.dllimport("user32.dll", charset = system.runtime.interopservices.charset.auto, setlasterror = true)]
        public static extern int systemparametersinfo(int uaction, int uparam, stringbuilder lpvparam, int fuwinini);

        private const int spi_getdeskwallpaper = 0x0073;
        #endregion

void windowsbtn_click(object sender, routedeventargs e)
        {
            //定义存储缓冲区大小
            stringbuilder s = new stringbuilder(300);
            //获取window 桌面背景图片地址，使用缓冲区
            systemparametersinfo(spi_getdeskwallpaper, 300, s, 0);
            //缓冲区中字符进行转换
            string wallpaper_path = s.tostring(); //系统桌面背景图片路径
         }

调用windows api获取

使用的时候需要注意stringbuilder的大小不能小于255,因为windows的路径最大支持255,如果定义过小...

如果当前系统桌面无背景或为纯色则返回空.