使用c讀取網站內容時出現錯誤＃

Question

我試圖用C＃獲取代碼中的網頁內容，但它給了我錯誤。請幫我解決它。

string url = "http://www.abesoft.org/query.asp 
       searchtype=ANY& 
       query_param=USDOT&original_query_param=NAME& 
       query_string=2134430&original_query_string=NATIONAL GRASS LLC"; 

WebRequest request = WebRequest.Create(url); 
WebResponse response = request.GetResponse(); 
Stream data = response.GetResponseStream(); 
string html = String.Empty; 
using (StreamReader sr = new StreamReader(data)) 
{ 
     html = sr.ReadToEnd(); 
} 

錯誤 - "The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel."

Answer 1

你或許可以使用：

ServicePointManager.CertificatePolicy = delegate { return true; }; 

要忽略證書錯誤。來源是這篇文章：

http://www.west-wind.com/weblog/posts/2011/Feb/11/HttpWebRequest-and-Ignoring-SSL-Certificate-Errors

基本上你只是想忽略在該網站上的壞證書。

Answer 2

試試這個：

string url =@"http://www.safersys.org/query.asp? 
       searchtype=ANY&query_type=queryCarrierSnapshot& 
       query_param=USDOT&original_query_param=NAME& 
       query_string=2134430&original_query_string=NATIONAL GRASS LLC"; 

HttpWebRequest request = (HttpWebRequest) HttpWebRequest.Create(url); 
request.AllowAutoRedirect = false; 

WebResponse response = request.GetResponse(); 
Stream data = response.GetResponseStream(); 
string html = String.Empty; 
using (StreamReader sr = new StreamReader(data)) 
{ 
     html = sr.ReadToEnd(); 
}