asp.net-mvc – 使用partialview时,HttpPostedFileBase始终为nul

我正在开发一个使用自定义模式弹出窗口在服务器上上传pdf文件的应用程序.我正在使用文件上传浏览器html控件来上传.pdf文件,此控件是在部分视图中设计的.当我点击“添加”按钮然后在服务器端我没有得到HttpPostedFileBase和FormCollection值.

这是我的代码：

局部视图：

@model Zytron.Models.ProductDataControls

    @using (Html.BeginForm("UploadFiles","AdminPanel",FormMethod.Post,new
    {
        @id = "file_upload",}))

    {

        <table width="100%" cellpadding="5" cellspacing="1">
            <tr>
                <td>
                    <span>Description</span>
                </td>
            </tr>
            <tr>
                <td>
                    @Html.TextBoxFor(m => m.Description,new
               {
                   @class = "textBox"
               })
                    @Html.HiddenFor(m => m.ProductId)
                    @Html.HiddenFor(m => m.ParentId)
                </td>
            </tr>
            <tr>
                <td>
                    <span>File Source</span>
                </td>
            </tr>
            <tr>
                <td>
                    <input type="file" id="fileUpload" name="fileUpload" size="23" />
                </td>
            </tr>
        </table>
    }

型号代码：

public class ProductDataControls

 {



       public string Description { get; set; }

  }

自定义模态弹出代码：

function loadProdAttachFile(tag,event,target) 
{
    event.preventDefault();
    var $loading = $('<img src="@Url.Content("~/Images/ajaxLoading.gif")" alt="loading" class="ui-loading-icon">');
    var $url = $(tag).attr('href');
    var $title = $(tag).attr('title');
    var $dialog = $('<div></div>');
    $dialog.empty();
    //            alert($url);
    $dialog
            .append($loading)
            .load($url)
              .dialog({
                  autoOpen: false,title: $title,width: 500,modal: true,minHeight: 220,show: 'fade',hide: 'fade'
              });

              $dialog.dialog("option","buttons",{
                  "Add": function () {
                      var dlg = $(this);
                      //$('form#file_upload').submit();

                      var file = document.getElementById("fileUpload").value;
                      var pid = getParamValue("pid",$url);
                      var type = getParamValue("type",$url);

                      $.ajax({
                          url: '/AdminPanel/UploadFiles',type: 'POST',data: { 'file': file,'pid' : pid,'type' : type },success: function (response) {
                              dlg.dialog('close');
                              dlg.empty();
                          },error: function (xhr) {
                              if (xhr.status == 400)
                                  dlg.html(xhr.responseText,xhr.status);     /* display validation errors in edit dialog */
                              else
                                  displayError(xhr.responseText,xhr.status); /* display other errors in separate dialog */
                          }
                      });

                  },"Cancel": function () {
                      $(this).dialog("close");
                      $(this).empty();
                  }
              });
    $dialog.dialog('open');
};

控制器代码：

[HttpPost]

public void UploadFiles(HttpPostedFileBase file,FormCollection form)
{
}

查看代码：

<a href "/ UploadFiles” class="ModalDlgProdAttachment"   <img src=”../Images/MyImage.jpg" /> </a>

$('a. ModalDlgProdAttachment).live("click",function (event) { loadProdAttachFile(this,"# file_upload"); });