我使用以下代码设置桌面壁纸时遇到了问题。SystemParametersInfo返回true,但它并没有改变壁纸。它与之前相同,没有任何变化。但是我想让代码定期从*.bmp文件目录更改壁纸。请告诉我我在哪里犯了错误。
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;
}
}
Console.WriteLine(images[currentImage].FullName);
这一行会出现“IndexOutOfRangeException”。 - Mohammad Dehghan