我在使用以下代码设置桌面墙纸时遇到问题。 SystemParametersInfo 返回 true 但它不会更改墙纸。它和以前一样,没有任何变化。但我希望代码从 *.bmp 文件目录中定期更改墙纸。请让我知道我在哪里犯了错误。
class Program
{
[DllImport("user32.dll")]
public static extern bool SystemParametersInfo(UInt32 uiAction, UInt32 uiParam, string pvParam, UInt32 fWinIni);
static FileInfo[] images;
static int currentImage;
static void Main(string[] args)
{
DirectoryInfo dirInfo = new DirectoryInfo(@"C:/users/Smart-PC/Desktop");
images = dirInfo.GetFiles("*.bmp", SearchOption.TopDirectoryOnly);
currentImage = 0;
System.Timers.Timer imageChangeTimer = new Timer(5000);
imageChangeTimer.Elapsed += new ElapsedEventHandler(imageChangeTimer_Elapsed);
imageChangeTimer.Start();
Console.ReadLine();
}
static void imageChangeTimer_Elapsed(object sender, ElapsedEventArgs e)
{
const uint SPI_SETDESKWALLPAPER = 30;
const int SPIF_UPDATEINIFILE = 0x01;
const int SPIF_SENDWININICHANGE = 0x02;
bool gk;
gk = SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, images[currentImage++].FullName, SPIF_SENDWININICHANGE | SPIF_UPDATEINIFILE);
Console.Write(gk);
Console.WriteLine(images[currentImage].FullName);
currentImage = (currentImage >= images.Length) ? 0 : currentImage;
}
}
最佳答案
我刚刚测试了这个,它对我有用。顺便说一句,根据操作系统的不同,它仅适用于位图,如果您要尝试任何其他格式,则需要转换为位图。
using System;
using System.Runtime.InteropServices;
namespace ConsoleApplication1
{
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 static String imageFileName = "c:\\test\\test.bmp";
static void Main(string[] args)
{
SetImage(imageFileName);
Console.ReadKey();
}
private static void SetImage(string filename)
{
SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, filename, SPIF_UPDATEINIFILE);
}
}
}
关于c# - 定期更换桌面墙纸,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15051245/