asp.net-mvc – HttpPostedFileBase没有绑定到模型

这是我的ViewModel

public class FaultTypeViewModel
{
    [HiddenInput(DisplayValue = false)]
    public int TypeID { get; set; }

    [Required(ErrorMessageResourceType = typeof(AdministrationStrings),ErrorMessageResourceName = "FaultTypeNameRequired")]
    [Display(ResourceType = typeof(AdministrationStrings),Name = "FaultTypeName")]
    public string TypeName { get; set; }

    [Display(ResourceType = typeof(AdministrationStrings),Name = "FaultTypeDescription")]
    [DataType(DataType.MultilineText)]
    public string TypeDescription { get; set; }

    [Display(ResourceType = typeof(AdministrationStrings),Name = "FaultTypeImageFile")]
    public HttpPostedFileBase TypeImageFile { get; set; }

    [HiddenInput(DisplayValue = false)]
    public string TypeImageURL { get; set; }
}

注意我有一个“TypeImageFile”HttpPostedFileBase
我会期望模型绑定器将该属性从表单绑定到模型传递给控制器我只是继续接收null.

这里是View中的相关代码：

@using (Html.BeginForm("AddFaultType","Administration",FormMethod.Post))
{

    <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">
            ×</button>
        <h3 id="myModalLabel">@SharedStrings.Add @SharedStrings.FaultType</h3>
    </div>
    <div class="modal-body">
        @Html.ValidationSummary(true)
        <div class="editor-label">
            @Html.LabelFor(model => model.TypeName)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.TypeName)
            @Html.ValidationMessageFor(model => model.TypeName)
        </div>
        <div class="editor-label">
            @Html.LabelFor(model => model.TypeDescription)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.TypeDescription)
            @Html.ValidationMessageFor(model => model.TypeDescription)
        </div>
        <div class="editor-label">
            @Html.LabelFor(model => model.TypeImageFile)
        </div>
        <div class="editor-field">
            <input type="file" name="TypeImageFile" id="TypeImageFile" />
        </div>
    </div>

    <div class="modal-footer">
        <input type="submit" value="@SharedStrings.Add" class="btn btn-primary" />
        @Html.ActionLink(SharedStrings.Cancel,"Index",null,new { Class = "btn",data_dismiss = "modal",aria_hidden = "true" })
    </div>
}

这里是控制器：

[HttpPost]
        public ActionResult AddFaultType(FaultTypeViewModel i_FaultToAdd)
        {
            var fileName = Path.GetFileName(i_FaultToAdd.TypeImageFile.FileName);
            var path = Path.Combine(Server.MapPath("~/App_Data/uploads"),fileName);
            i_FaultToAdd.TypeImageFile.SaveAs(path);

            return RedirectToAction("Index");
        }

解决方法

@using (Html.BeginForm("AddFaultType",FormMethod.Post,new { enctype = "multipart/form-data" }))
{
    ...
}

（编辑：安卓应用网）

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