c# - 使用 C#.NET 1.1 的程序化 HTML POST

Question

我正在尝试使用 iFrame 将 Moneris 托管支付页面集成到我的 .net 1.1 应用程序中。我以前做过很多次，但不是用 .net 1.1。我似乎找不到用 1.1 进行程序化 HTML 发布的好资源。有什么建议吗？

谢谢!

编辑:仔细研究给出的建议，我意识到 HttpWebRequest 解决方案不起作用，因为您不能与 POST 一起进行重定向。为了与 Moneris 正确集成，您必须发布金额值，然后重定向到您发布到的 URL。抱歉造成混淆。

Answer 1

您可以使用 HttpWebRequest和 HttpWebResponse类来实现这一目标。

例如，要 POST 到具有两个字段的 HTML 表单，username 和 password，您可以这样做:

NameValueCollection nv = new NameValueCollection();
nv.Add("username", "bob");
nv.Add("password", "password");

string method = "POST"; // or GET
string url = "http://www.somesite.com/form.html";

HttpStatusCode httpStatusCode;
string response = SendHTTPRequest(nv, method, url, out httpStatusCode);


public static string SendHTTPRequest(NameValueCollection data, 
         string method, 
         string url, 
         out HttpStatusCode httpStatusCode)
{
  StringBuilder postData = new StringBuilder();
  foreach(string key in data)
  {
    postData.Append(key + "=" + data[key] + "&");
  }

  if(method == "GET" && data.Count > 0)
  {
    url += "?" + postData.ToString();
  }

  HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
  httpWebRequest.Method = method;
  httpWebRequest.Accept = "*/*";
  httpWebRequest.ContentType = "application/x-www-form-urlencoded";

  if(method == "POST")
  {
    using(Stream requestStream = httpWebRequest.GetRequestStream())
    {
      using(MemoryStream ms = new MemoryStream())
      {
        using(BinaryWriter bw = new BinaryWriter(ms))
        {
          bw.Write(Encoding.GetEncoding(1252).GetBytes(postData.ToString()));
          ms.WriteTo(requestStream);
        }
      }
    }
  }

  return GetWebResponse(httpWebRequest, out HttpStatusCode httpStatusCode);
}

private static string GetWebResponse(HttpWebRequest httpWebRequest, 
          out HttpStatusCode httpStatusCode)
{
  using(HttpWebResponse httpWebResponse = 
           (HttpWebResponse)httpWebRequest.GetResponse())
  {
    httpStatusCode = httpWebResponse.StatusCode;

    if(httpStatusCode == HttpStatusCode.OK)
    {
      using(Stream responseStream = httpWebResponse.GetResponseStream())
      {
        using(StreamReader responseReader = new StreamReader(responseStream))
        {
          StringBuilder response = new StringBuilder();

          char[] read = new Char[256];
          int count = responseReader.Read(read, 0, 256);

          while(count > 0)
          {
            response.Append(read, 0, count);
            count = responseReader.Read(read, 0, 256);
          }
          responseReader.Close();
          return response.ToString();
        }
      }
    }
    return null;
  }
}