Question

C# 判断网站是否能访问

我想实现的功能是：在3秒内就可以判断网站是否可以访问，代码如下：
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Timeout = 1000 * 3;

HttpWebResponse myResponse = (HttpWebResponse)request.GetResponse();

if (myResponse.StatusDescription.ToString().ToLower() == "ok")
{
return true;
}
}
catch (WebException webex)
{
return false;
}
但要等20多秒才能返回结果，不知道要解决

Answer 1

楼上写的很清楚了，Try里的表示连接正常，catch表示连接不上。try
{
WebRequest myRequest = WebRequest.Create(" http://www.163.com");

WebResponse myResponse = myRequest.GetResponse();

myResponse.Close(); MessageBox.Show("连上了");
}
catch
{
MessageBox.Show("连不上");
} 不过，网页打开是异步过程，应该再加个定时器。

Answer 2

HttpWebResponse response = (HttpWebResponse)request.GetResponse();
if (response == null || response.StatusCode != HttpStatusCode.OK)