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(微信API接口开发) 使用HttpWebRequest进行请求时发生错误：基础连接已关闭，发送时发生错误处理

yunbo1
微信
2026-08-11
103

最近调试原来的微信模拟登陆时发生了“基础连接已关闭，发送时发生错误”的错误提示，原来都是好好的，只是很久没用了。

出错代码如下：

    ?
   
         HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(
         "https://mp.weixin.qq.com/cgi-bin/loginpage?t=wxm2-login&lang=zh_CN"
         );///cgi-bin/loginpage?t=wxm2-login&lang=zh_CN  
        
         req.CookieContainer = cookie;  
        
         req.Method = 
         "GET"
         ;  
        
         req.ProtocolVersion = HttpVersion.Version10;  
        
         HttpWebResponse res = (HttpWebResponse)req.GetResponse();  
        
         StreamReader rd = 
         new 
         StreamReader(res.GetResponseStream());  
        
         string 
         theContent = rd.ReadToEnd();

经过一番Google和试验，答案既如此简单，增加如下一句：

ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;

1 req.CookieContainer = cookie; 2 req.Method = "GET"; 3 req.ProtocolVersion = HttpVersion.Version10; 4 ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;  5 HttpWebResponse res = (HttpWebResponse)req.GetResponse(); 6 StreamReader rd = new StreamReader(res.GetResponseStream()); 7 string theContent = rd.ReadToEnd();