MVC文件上传集合总是空

Question

这是工作，现在原因不明我的文件的集合为null

VIEW

@section termimalContent { 
     @using (Html.BeginForm("Add", "Terminals_Policies", FormMethod.Post, new { enctype = "multipart/form-data" })) 
     { 
     @Html.ValidationSummary(true) 
     <fieldset> 
      <legend> 
      <h2> 
       Create new policy</h2> 
      </legend> 
      <p> 
      <strong>Assigning devices to Node:</strong> @Model.GroupName</p> 
      <div class="editor-label"> 
      @Html.LabelFor(model => model.PolicyName) 
      </div> 
      <div class="editor-field"> 
      @Html.EditorFor(model => model.PolicyName) 
      @Html.ValidationMessageFor(model => model.PolicyName) 
      </div> 
      <div class="editor-label"> 
      @Html.LabelFor(model => model.PolicyType) 
      </div> 
      <div class="editor-field"> 
      @Html.DropDownListFor(model => model.SelectedItem, new SelectList(Model.PolicyType, "Value", "Text"),new {@class = "PackageDDL"}) 
      @Html.ValidationMessageFor(model => model.SelectedItem) 
      </div> 

      @foreach (var pick in Model.PackageTypeItems) 
      { 
      <div class="editor-label"> 
       <label for="@pick.Name"> 
       @pick.Name:</label> 
      </div> 
      <div class="editor-field"> 
       <input class="text-box single-line" type="file" name="@pick.Name.Trim()" id="@pick.Name.Trim()" data-val="@pick.IsRequired.ToString().ToLower()" data-val-required="Please select a file" /> 
       @Html.ValidationMessage(pick.Name.Trim()) 
      </div> 
      } 

      @Html.HiddenFor(model => model.GroupId) 
      @Html.HiddenFor(model => model.GroupName) 
      <p> 
      <input type="submit" value="Create" /> 
      </p> 
     </fieldset> 
     } 
    } 

HTML生成

<form action="/Terminals_Policies/Add/1" enctype="multipart/form-data" method="post"> <fieldset> 
     <legend> 
     <h2> 
      Create new policy</h2> 
     </legend> 
     <p> 
     <strong>Assigning devices to Node:</strong> Root</p> 
     <div class="editor-label"> 
     <label for="PolicyName">PolicyName</label> 
     </div> 
     <div class="editor-field"> 
     <input class="text-box single-line" data-val="true" data-val-length="Policy name cannot be longer than 50 characters." data-val-length-max="50" data-val-required="Please enter the policy name" id="PolicyName" name="PolicyName" type="text" value="" /> 
     <span class="field-validation-valid" data-valmsg-for="PolicyName" data-valmsg-replace="true"></span> 
     </div> 
     <div class="editor-label"> 
     <label for="PolicyType">PolicyType</label> 
     </div> 
     <div class="editor-field"> 
     <select class="PackageDDL" data-val="true" data-val-number="The field SelectedItem must be a number." id="SelectedItem" name="SelectedItem"><option value="1">IT application</option> 
<option value="3"> definition</option> 
<option value="4">definition</option> 
<option value="5">project</option> 
<option value="6">relay schedules</option> 
<option value="7">table data</option> 
<option value="9">transfer definition</option> 
<option value="10">firmware update request</option> 
<option value="11"> firmware update request</option> 
<option value="12">dat</option> 
<option value="15"> firmware</option> 
<option value="16"> hex</option> 
<option value="17">project</option> 
<option value="18">firmware</option> 
</select> 
     <span class="field-validation-valid" data-valmsg-for="SelectedItem" data-valmsg-replace="true"></span> 
     </div> 

     <div class="editor-label"> 
      <label for="IT application file        "> 
      IT application file        :</label> 
     </div> 
     <div class="editor-field"> 
      <input class="text-box single-line" type="file" name="IT application file" id="IT application file" data-val="true" data-val-required="Please select a file" /> 
      <span class="field-validation-valid" data-valmsg-for="IT application file" data-valmsg-replace="true"></span> 
     </div> 

     <input data-val="true" data-val-number="The field GroupId must be a number." data-val-required="The GroupId field is required." id="GroupId" name="GroupId" type="hidden" value="1" /> 
     <input id="GroupName" name="GroupName" type="hidden" value="Root" /> 
     <p> 
     <input type="submit" value="Create" /> 
     </p> 
    </fieldset> 
</form> 

控制器：

[HttpGet] 
    public ActionResult Add(int id) 
    { 
     _polAdd = CreatePolicyAddModel(id); 
     return View(_polAdd); 
    } 

    [HttpPost] 
    public ActionResult Add(IEnumerable<HttpPostedFileBase> files, vmPoliciesAdd model) 
    { 
     _policyLogic.AddPolicyFile(files,model.PolicyName,(int)model.SelectedItem, "FILE"); 
     return View(); 
    } 

在上张贴控制器的动作colelction是空的，任何人都可以看到一个明显的错误

Answer 1

命名问题：

当然

<input class="text-box single-line" type="file" name="IT application file" id="IT application file" data-val="true" data-val-required="Please select a file" /> 

应该是：

<input class="text-box single-line" type="file" name="files" id="IT application file" data-val="true" data-val-required="Please select a file" /> 

所以解决您的剃刀代码，并确保你如果您希望模型联编程序能够绑定到名为files的动作参数，则会在文件输入中应用正确的名称：

<input class="text-box single-line" type="file" name="files" id="@pick.Name.Trim()" data-val="@pick.IsRequired.ToString().ToLower()" data-val-required="Please select a file" /> 

的啊，顺便id的不能包含空格。所以你有一个破碎的HTML。以下似乎是错误的：id="@pick.Name.Trim()"以及。