继承 httpwebrequest和HttpWebResponse类时遇到错误 CS1729

Posted 2023-03-29

出问题的代码是这样的：
public class MyWebRequest:System.Net.HttpWebRequest

【错误在这一行】 public MyWebRequest(Uri uri, bool bKeepAlive, string proxyName, int proxyPort)

Headers = new WebHeaderCollection();
RequestUri = uri;
Headers["Host"] = uri.Host;

错误是 错误 CS1729: “System.Net.HttpWebRequest”不包含采用“0”参数的构造函数
c:\Windows\Microsoft.NET\Framework\v2.0.50727\System.dll: (相关文件)

和
public class MyWebResponse:System.Net.HttpWebResponse

【错误在这行】 public MyWebResponse()
【没错，这里什么也没有】


错误 CS1729: “System.Net.HttpWebResponse”不包含采用“0”参数的构造函数

请问这是什么原因，如何解决？

谢谢

PS:这个程序里面的mywebrequest类是已经写好的，很多地方要调用，改起来很麻烦。但是它里面貌似没有cookiecontainer，现在应用上恐怕要用到，所以我想通过继承让它能够使用cookiecontainer。

参考技术A System.Net.HttpWebResponse构造函数如下：

protected HttpWebResponse(SerializationInfo serializationInfo, StreamingContext streamingContext);
internal HttpWebResponse(Uri responseUri, KnownHttpVerb verb, CoreResponseData coreData, string mediaType, bool usesProxySemantics, DecompressionMethods decompressionMethod);

你定义的构造函数，在System.Net.HttpWebResponse中未定义，所以报些编译错误

参考资料：http://msdn.microsoft.com/zh-cn/library/bb384029.aspx

参考技术B 继承的时候会隐式的调用父类无参的构造函数。
改成：
public MyWebRequest(Uri uri, bool bKeepAlive, string proxyName, int proxyPort) ：base（参数）

Headers = new WebHeaderCollection();
RequestUri = uri;
Headers["Host"] = uri.Host;
。。。。。
本回答被提问者采纳

获取登录cookieColletion在cef里面打开网页

public static BaseResult getHTML(string url, Encoding encoding, string cookieString)
        {
            CookieContainer loginCookies = new CookieContainer();
            BaseResult result = new BaseResult();
            HttpWebRequest hwr = (HttpWebRequest)HttpWebRequest.Create(url); //建立HttpWebRequest對象
            hwr.Method = "GET";
            hwr.Timeout = 60000; //定義服務器超時時間 
            //hwr.AllowAutoRedirect = false;
            
            hwr.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.65 Safari/537.36";
            hwr.Headers.Add("content", "text/html; charset=GBK");
            if (cookieString != null)
            {
                hwr.Headers.Add("Cookie", cookieString);
            }
            else
            {
                hwr.CookieContainer = loginCookies;
            }

            HttpWebResponse hwResponse = null;
            try
            {
                lock (obj)
                {
                    hwResponse = (HttpWebResponse)hwr.GetResponse(); //取得回應 
                    //判断HTTP响应状态 
                    if (hwResponse.StatusCode != HttpStatusCode.OK)
                    {
                        result.Code = 0;
                        result.Message = "访问失败！状态码：" + hwResponse.StatusCode;
                    }
                    else
                    {
                        result.Code = 1;
                        result.Message = "成功";
                        Stream s = hwResponse.GetResponseStream(); //得到回應的流對象 
                        StreamReader sr = new StreamReader(s, encoding); //以UTF-8編碼讀取流 
                        StringBuilder content = new StringBuilder(); // 
                        while (sr.Peek() != -1) //每次讀取一行,直到 
                        { //下一個字節沒有內容 
                            content.Append(sr.ReadLine()); //返回為止 
                        }
                        result.Content = content.ToString();
                        result.Cookie = hwResponse.Headers.Get("Set-Cookie");
                        result.cookieColletion = hwResponse.Cookies;
                    }
                }
            }
            catch (Exception ex)
            {
                result.Code = -1;
                result.Message = "请求失败,请检查地址";
                result.Content = ex.ToString();
            }
            finally
            {
                if (hwResponse != null)
                {
                    hwResponse.Close();
                }
                hwr = null;
            }
            return result;
        }

　　设置

private void SetCefCookies(string url, CookieCollection cookies)
        {
            CefSharp.Cef.GetGlobalCookieManager().SetStoragePath(Environment.CurrentDirectory, true);
            foreach (System.Net.Cookie c in cookies)
            {
                var cookie = new CefSharp.Cookie
                {
                    Creation = DateTime.Now,
                    Domain = c.Domain,
                    Name = c.Name,
                    Value = c.Value,
                    Expires = c.Expires
                };
                CefSharp.Cef.GetGlobalCookieManager().SetCookie(url, cookie);
                
               
            }
        }