如何将 POST 参数传递给 ASP.Net Web 请求？答案

【问题标题】：How to pass POST parameters to ASP.Net web request?如何将 POST 参数传递给 ASP.Net Web 请求？
【发布时间】：2016-07-15 22:39:52
【问题描述】：

我正在尝试使用 POST 方法在 ASP.NET 中以编程方式发出 Web 请求。
我也想通过网络请求发送 POST 参数。像这样的：

WebRequest req = WebRequest.Create("accounts.craigslist.org/login/pstrdr");
    req.Method = "POST";
    req.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
    //WebRequest.Parameters.add("areaabb","hou");

显然注释行不起作用。我如何做到这一点？

【问题讨论】：

标签： asp.net httpwebrequest

【解决方案1】：

试试这样...

  string email = "YOUR EMAIL";
  string password = "YOUR PASSWORD";

  string URLAuth = "https://accounts.craigslist.org/login";
  string postString = string.Format("inputEmailHandle={0}&name={1}&inputPassword={2}", email, password);

  const string contentType = "application/x-www-form-urlencoded";
  System.Net.ServicePointManager.Expect100Continue = false;

  CookieContainer cookies = new CookieContainer();
  HttpWebRequest webRequest = WebRequest.Create(URLAuth) as HttpWebRequest;
  webRequest.Method = "POST";
  webRequest.ContentType = contentType;
  webRequest.CookieContainer = cookies;
  webRequest.ContentLength = postString.Length;
  webRequest.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1";
  webRequest.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
  webRequest.Referer = "https://accounts.craigslist.org";

  StreamWriter requestWriter = new StreamWriter(webRequest.GetRequestStream());
  requestWriter.Write(postString);
  requestWriter.Close();

  StreamReader responseReader = new StreamReader(webRequest.GetResponse().GetResponseStream());
  string responseData = responseReader.ReadToEnd();

  responseReader.Close();
  webRequest.GetResponse().Close();

【讨论】：

嗨。感谢您的回复，一切都很完美，除了我根本没有得到任何回复。页面上没有打印任何内容。
好吧，我可以补充一点，Response.write() 解决了这个问题！
@V0R73X：你的意思是“responseData.Write()”吗？
@Nesim Razon 谢谢！你的代码对我有用，而 msdn.microsoft.com/en-us/library/debx8sh9(v=vs.110).aspx 没有！