我在以下代码上遇到错误。
HttpWebRequest webRequest = WebRequest.Create(URL) as HttpWebRequest;
webRequest.CookieContainer = cookies;
StreamReader responseReader = new StreamReader(webRequest.GetResponse().GetResponseStream());
HttpWebResponse response = (HttpWebResponse)webRequest.GetResponse();
response.Cookies = webRequest.CookieContainer.GetCookies(webRequest.RequestUri); //Error here
string responseData = responseReader.ReadToEnd();
responseReader.Close();
错误：System.InvalidOperationException：提交请求后无法执行此操作。在System.Net.HttpWebRequest.GetResponse（）
上面的代码有什么问题？
HttpWebResponse.Cookies属性应该已经包含与响应关联的cookie。
您还应该避免GetResponse多次呼叫。
var cookies = new CookieContainer();
HttpWebRequest webRequest = WebRequest.Create(URL) as HttpWebRequest;
webRequest.CookieContainer = cookies;
var response = (HttpWebResponse)webRequest.GetResponse();
using (var responseReader = new StreamReader(response.GetResponseStream())) {
var responseCookies = response.Cookies;
string responseData = responseReader.ReadToEnd();
//...
}
您可以将cookie容器重用于后续请求，因为它们会被响应添加
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