C# 如何通过 HTTP 请求发送 xml，并使用 ASP.NET MVC 接收它？
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How to send xml through an HTTP request, and receive it using ASP.NET MVC?
提问by Kalina
I am trying to send an xml string through an HTTP request, and receive it on the other end. On the receiving end, I am always getting that the xml is null. Can you tell me why that is?
我试图通过 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？
Send:
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();
}
}
Receive:
收到：
[HttpPost]
[ValidateInput(false)]
public ActionResult Index(string xml)
{
//xml is always null
...
return View(model);
}
采纳答案by Kalina
I was able to get this working like so:
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);
}
However, I am still curious why taking the xml as a parameter does not work.
但是，我还是很好奇为什么把xml作为参数不起作用。
回答by nomad
I believe this is because you've specified req.ContentType = "text/xml";.
我相信这是因为您已经指定了req.ContentType = "text/xml";.
If I remember correctly when you define your controller using a "primitive" type (stringbeing a "primitive" type here)
如果我没记错的话，当您使用“原始”类型（string此处为“原始”类型）定义控制器时
public ActionResult Index(string xml){}
MVC will try to look for xmleither in a query string or in the posted form data (html input field). But if you send something more complex to the server MVC will wrap it in a specific class.
MVC 将尝试xml在查询字符串或发布的表单数据（html 输入字段）中查找。但是如果你向服务器发送更复杂的东西，MVC 会将它包装在一个特定的类中。
For example, when you upload several files to the server you can accept them as follows in your controller
例如，当您将多个文件上传到服务器时，您可以在控制器中按如下方式接受它们
public ActionResult Index(IEnumerable<HttpPostedFileBase> files){}
So my guess is that you have to accept the text/xmlstream in the controller using the correct class.
所以我的猜测是你必须text/xml使用正确的类接受控制器中的流。
Update:
更新：
It seems there isn't such a class because you accept a data stream (and it's not coming from input element). You could write your own model binder to accept xml document. See discussions below.
似乎没有这样的类，因为您接受数据流（并且它不是来自输入元素）。您可以编写自己的模型绑定器来接受 xml 文档。请参阅下面的讨论。
Reading text/xml into a ASP.MVC Controller
