各位大哥:
我今天发现有一个问题,困扰了我好久,也不知道怎样解决,请高手看一看:
try
{
int i;
string retdata;
for (i=1;i<40;i++)
{
url="http://www.abc.com/"+i.ToString()+".asp";
HttpWebRequest req = (HttpWebRequest) WebRequest.Create(url);
req.CookieContainer=new CookieContainer();
req.AllowAutoRedirect = true;
req.MaximumAutomaticRedirections = 3;
req.UserAgent = "Mozilla/6.0 (MSIE 6.0; Windows NT 5.1; Natas.Robot)";
req.KeepAlive = true;
req.Timeout = 40000;
HttpWebResponse webresponse = (HttpWebResponse) req.GetResponse(); if (webresponse != null)
{
StreamReader stream = new StreamReader(webresponse.GetResponseStream(),Encoding.GetEncoding("GB2312"));
retdata=stream.ReadToEnd();
}
webresponse.Close();
}
catch(System.Exception e)
{
Console.Write("error");
}
}***************************************************************
我的问题是,程序中间遇到一个页面,返回信息是:(800)内部服务器错误,
在执行HttpWebResponse webresponse = (HttpWebResponse) req.GetResponse();时出错,
原因是该页面被删除或找不到之类的,该错误被catch到,我想跳过这个页面,再进入下一次
循环该怎么做,请各位高手指点一二!!!只要帮了忙的,本人一定给分,大家可以看我以前的记录。
我今天发现有一个问题,困扰了我好久,也不知道怎样解决,请高手看一看:
try
{
int i;
string retdata;
for (i=1;i<40;i++)
{
url="http://www.abc.com/"+i.ToString()+".asp";
HttpWebRequest req = (HttpWebRequest) WebRequest.Create(url);
req.CookieContainer=new CookieContainer();
req.AllowAutoRedirect = true;
req.MaximumAutomaticRedirections = 3;
req.UserAgent = "Mozilla/6.0 (MSIE 6.0; Windows NT 5.1; Natas.Robot)";
req.KeepAlive = true;
req.Timeout = 40000;
HttpWebResponse webresponse = (HttpWebResponse) req.GetResponse(); if (webresponse != null)
{
StreamReader stream = new StreamReader(webresponse.GetResponseStream(),Encoding.GetEncoding("GB2312"));
retdata=stream.ReadToEnd();
}
webresponse.Close();
}
catch(System.Exception e)
{
Console.Write("error");
}
}***************************************************************
我的问题是,程序中间遇到一个页面,返回信息是:(800)内部服务器错误,
在执行HttpWebResponse webresponse = (HttpWebResponse) req.GetResponse();时出错,
原因是该页面被删除或找不到之类的,该错误被catch到,我想跳过这个页面,再进入下一次
循环该怎么做,请各位高手指点一二!!!只要帮了忙的,本人一定给分,大家可以看我以前的记录。
string retdata;
for (i=1;i<40;i++)
{
url="http://www.abc.com/"+i.ToString()+".asp";
HttpWebRequest req = (HttpWebRequest) WebRequest.Create(url);
req.CookieContainer=new CookieContainer();
req.AllowAutoRedirect = true;
req.MaximumAutomaticRedirections = 3;
req.UserAgent = "Mozilla/6.0 (MSIE 6.0; Windows NT 5.1; Natas.Robot)";
req.KeepAlive = true;
req.Timeout = 40000;
try
{
HttpWebResponse webresponse = (HttpWebResponse) req.GetResponse(); if (webresponse != null)
{
StreamReader stream = new StreamReader(webresponse.GetResponseStream(),Encoding.GetEncoding("GB2312"));
retdata=stream.ReadToEnd();
}
webresponse.Close();
}
catch
{
continue;
}