C#设置背景图片变换

思路：
1.创建定时器
2.设置背景图片

C#设置背景图片变换

通过发送请求方式获取图片

//设置背景图片 变动
public static void pictureShow(UIPanel picturePl)
{
    
    
	int i = 1;
	Timer pictureTimer = new Timer();
	pictureTimer.Enabled = true;
	pictureTimer.Interval = 5000;
	pictureTimer.Tick += new EventHandler((s, x) =>
	{
    
    
		string url = string.Empty;
		if (i==1)
		{
    
    
			url = string.Format(@"http://www.图片.cn/images/1.jpg");
		}
		else if (i==2)
		{
    
    
			url = string.Format(@"http://www.图片.cn/images/2.jpg");
		}
		else if (i == 3)
		{
    
    
			url = string.Format(@"http://www.图片.cn/images/3.jpg");
		}
		else if (i == 4)
		{
    
    
			url = string.Format(@"http://www.图片.cn/images/4.jpg");
		}
		else if (i == 5)
		{
    
    
			url = string.Format(@"http://www.图片.cn/images/5.jpg");
		}
		else
		{
    
    
			i = 1;
			url = string.Format(@"http://www.图片.cn/images/6.jpg");
		}
		setPicture(url, picturePl);

		i++;
	});

}

public static void setPicture(string imgUrl, UIPanel picturePl)
{
    
    
	System.Net.WebRequest webreq = System.Net.WebRequest.Create(imgUrl);
	System.Net.WebResponse webres = webreq.GetResponse();
	using (System.IO.Stream stream = webres.GetResponseStream())
	{
    
    
		picturePl.BackgroundImage = Image.FromStream(stream);
	}
}

亲测有效