c# - 如何通过 HTTP 请求发送 xml，并使用 ASP.NET MVC 接收它？

Question

我正在尝试通过 HTTP 请求发送一个 xml 字符串，并在另一端接收它。在接收端，我总是得到 xml 为空。你能告诉我这是为什么吗？

发送:

    var url = "http://website.com";
    var postData = "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?><xml>...</xml>";
    byte[] bytes = System.Text.Encoding.ASCII.GetBytes(postData);

    var req = (HttpWebRequest)WebRequest.Create(url);

    req.ContentType = "text/xml";
    req.Method = "POST";
    req.ContentLength = bytes.Length;

    using (Stream os = req.GetRequestStream())
    {
        os.Write(bytes, 0, bytes.Length);
    }

    string response = "";

    using (System.Net.WebResponse resp = req.GetResponse())
    {
        using (StreamReader sr = new StreamReader(resp.GetResponseStream()))
        {
            response = sr.ReadToEnd().Trim();
        }
     }

接收:

[HttpPost]
[ValidateInput(false)]
public ActionResult Index(string xml)
{
    //xml is always null
    ...
    return View(model);
}

Answer 1

我能够像这样工作:

[HttpPost]
[ValidateInput(false)]
public ActionResult Index()
{
    string xml = "";
    if(Request.InputStream != null){
        StreamReader stream = new StreamReader(Request.InputStream);
        string x = stream.ReadToEnd();
        xml = HttpUtility.UrlDecode(x);
    }
    ...
    return View(model);
}

不过我还是很好奇为什么把xml作为参数不行。