提交表单的问题与IE

Question

我有一个包含几个字段，但是必要的，因为这头形式：

var form = $(this).closest("form"), 
    url = $(form).attr("action"), 
    formdata = $(form).serialize(); 

if ($.browser.msie && window.XDomainRequest) { 

    formdata = encodeURI(formdata); 

    var xdr = new XDomainRequest(); 
    xdr.onload = submitAnswerDone; 
    xdr.onerror = submitAnswerDone; 
    xdr.open("POST", url); 
    xdr.send(formdata); 
} 
else { 
    $.support.cors = true; 

    $.ajax({ 
     type: 'POST', 
     url: url, 
     data: formdata, 
     success: submitAnswerDone, 
     error: function (xhr, ajaxOptions, thrownError) { 
      //console.log('result: Error ' + xhr.status); 
      //console.log(thrownError); 
     } 
    }); 
} 

的表在托管：

<form action="http://api.domain_A.com/43bdb030-e1e4-4526-86e5-5b8ba98aa117/Form/Challenge" 
     method="post" 
     id="frm-challenge" 
     accept-charset="utf-8" 
     enctype="application/x-www-form-urlencoded"> ... </form> 

，我与提交http://{client_name}.domain-A.com/并提交至http://api.domain-A.com/。

在服务器端，我有一个ASP.NET MVC 3正在获取表单的网站。

控制器的动作看起来像：

[HttpPost] 
public JsonResult Challenge(FormCollection form) 
{ 
    // u = Calendar GUID 
    // c = Challenge GUID 
    // s = Subscriber GUID 
    // a = Answer GUID 

    // flash = Flash 
    // screen = Screen 

    StringBuilder data = new StringBuilder(); 

    foreach (string f in form) 
     data.AppendFormat("Name: >{0}<Value:>{1}< |\n", f, form[f]); 

    // ### LOG EVENT ############################################### 
    try 
    { 

     Loggr.Events.Create() 
      .Text("Challenge test [u]") 
      .Source(Request.UrlReferrer != null ? Request.UrlReferrer.ToString() : Request.Url.ToString()) 
      .Data("Form: >{0}<\n, Request: >{1}<", form["u"], Request["u"]) 
      .AddData(data.ToString()) 
      .AddData("Browser: {0}", Request.ServerVariables["HTTP_USER_AGENT"]) 
      .Post(); 
    } 
    catch (Exception ex) 
    { 
     Loggr.Events.Create() 
      .Text("Error: Challenge test [u]") 
      .Source(Request.UrlReferrer != null ? Request.UrlReferrer.ToString() : Request.Url.ToString()) 
      .Data(ex.Message) 
      .AddData(data.ToString()) 
      .AddData("Browser: {0}", Request.ServerVariables["HTTP_USER_AGENT"]) 
      .Post(); 
    } 

    // ### SAVE EVENT ############################################### 
    SecondaryDb db = new SecondaryDb(); 
    try 
    { 
     string c, u, s, a, fl, sc; 

     c = form["c"] ?? ""; 
     u = form["u"] ?? ""; 
     s = form["s"] ?? ""; 
     a = form["a"] ?? ""; 
     fl = form["flash"] ?? ""; 
     sc = form["screen"] ?? ""; 

     string ip = Request.ServerVariables["HTTP_X_FORWARDED_FOR"], 
       browser = Request.ServerVariables["HTTP_USER_AGENT"]; 

     if (string.IsNullOrWhiteSpace(ip)) 
      ip = Request.ServerVariables["REMOTE_ADDR"]; 

     db.AddSubscriberAnswerTest(u, c, a, s, browser, ip, fl, sc); 

     string fields = String.Format("s:{0} c:{1} u:{2} a:{3}", s, c, u, a); 

     return Json(new ApiResult() { ErrorCode = 0, Message = "Answer added (" + fields + ")" }, JsonRequestBehavior.DenyGet); 

    } 
    catch (Exception ex) 
    { 
     if (ex.InnerException != null) 
      while (ex.InnerException != null) 
       ex = ex.InnerException; 

     StringBuilder fields = new StringBuilder(); 
     foreach (var f in form.AllKeys) 
     { 
      fields.AppendFormat("{0}:{1} | ", f, form[f]); 
     } 

     db.AddErrorTest(ex.Message, ex.StackTrace, fields.ToString().TrimEnd(' ')); 

     return Json(new ApiResult() { ErrorCode = 99, Message = ex.Message }, JsonRequestBehavior.DenyGet); 
    } 
} 

的问题是，在所有的浏览器，我得到正确的一切，但不是在任何Internet Explorer中提交（7，8或者9）

我解雇了提琴手，我可以看到形式已发出：

POST http://api.domain_A.com/43bdb030-e1e4-4526-86e5-5b8ba98aa117/Form/ChallengeTest HTTP/1.1 
Accept: */* 
Origin: http://preview.domain_A.com 
Accept-Language: da-DK 
Accept-Encoding: gzip, deflate 
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0) 
Host: api.domain_A.com 
Content-Length: 239 
Connection: Keep-Alive 
Pragma: no-cache 

u=43bdb030-e1e4-4526-86e5-5b8ba98aa117&c=f83c28d0-112a-4a88-986f-bcae8b30113b&s=&testmode=true&cType=1&flash=Flash%253A+WIN+11%252C3%252C300%252C270&screen=Screen%253A+1920x1040+(24+bits)&preview=True&a=bc3eb9cc-29a2-43e9-b507-a39a417f53aa 

，我从它那里得到

HTTP/1.1 200 OK 
Server: nginx 
Date: Sun, 05 Aug 2012 21:12:43 GMT 
Content-Type: application/json; charset=utf-8 
Content-Length: 78 
Connection: keep-alive 
Cache-Control: private 
Access-Control-Allow-Methods: POST, GET, OPTIONS 
Access-Control-Allow-Origin: * 
X-UA-Compatible: IE=Edge,chrome=1 
P3P: policyref="/w3c/p3p.xml", CP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT" 

{"ErrorCode":0,"Message":"Answer added (s: c: u: a:)","Fields":"","Data":null} 

和答案望着那被保存Loggr事件，我得到空form["u"]，换句话说，我FormCollection是空的！

我在做什么错？

跨域协议是在地方，你可以通过小提琴手头输出查了，我有地方crossdomain.xml与

<?xml version="1.0"?> 
<!DOCTYPE cross-domain-policy SYSTEM 
"http://www.adobe.com/xml/dtds/cross-domain-policy.dtd"> 

<cross-domain-policy> 
    <site-control permitted-cross-domain-policies="all"/> 
    <allow-access-from domain="*" secure="false"/> 
    <allow-http-request-headers-from domain="*" headers="*" secure="false"/> 
</cross-domain-policy> 

---

新增

如果我从

改变

[HttpPost] 
public JsonResult Challenge(FormCollection form) 

至

[HttpPost] 
public JsonResult Challenge(
    string u, string c, string s, string a, string flash, string screen) 

我仍然得到所有值为空！

Answer 1

尝试获得通过请求

Request.Form["u"]