小编Abh*_*h V的帖子

我正在对传递 FormData() 的控制器进行 ajax 调用，它有一个对象数组以及一些其他属性。在我的控制器中，我传递的列表数组似乎有 0 个元素。请帮忙！

cshtml 视图中的脚本 -

    var _getFormDataToJson = function () {                            
            var applyDetail = [];
            $(_tb).find('tbody tr').each(function (i, v) {
                var trans = {
                    effectiveDate: $(this).find('.effectiveDate').val(),
                    amount: $(this).find('.amount').val(),
                    empLeaveHdID: $('#tx-leaveHdID').val(),
                    //attachmentUrl: $(this).find('.leaveAttachment')[0].files[0]
                }

                applyDetail.push(trans);
            });

            var formObj = new FormData();
            formObj.append('remark', $('#tx-remark').val());
            formObj.append('leaveAppType', $('#hdnLeaveAppType').val());
            formObj.append('applyDetail', applyDetail); //this collection has 0 items in controller

            return formObj;
        }

        var _sumbitForm = function () {
            var formData2 = _getFormDataToJson();               
                $.ajax({
                    url: '@Url.Action("ApplyLeave", "Leave")',
                    type: 'POST',
                    processData: false,
                    contentType: …

即使在Ajax.BeginForm中，我指定了targetId（这是我的局部视图），它仍在替换完整视图。我想念什么吗？

ProductList.cshtml

<div class="form-style-1" style="float:left">
           @using (Ajax.BeginForm("SearchProducts", "Product", new AjaxOptions()
           {
           HttpMethod="POST",
           InsertionMode = System.Web.Mvc.Ajax.InsertionMode.Replace,
           UpdateTargetId = "product-list-container"
           }))
           {
           <form>
              <input name="SearchText" id="SearchText" class="field-divided" style="width: 300px;" type="text" />
              <input type="submit" value="Search" class="myButton" />
           </form>
           }
        </div>@Html.Partial("ListPartialView", Model)


ListPartialView.cshtml - 

<div id="product-list-container">
    @foreach (var product in Model)
    {
        <div class="product_box margin_r40">
            <div class="thumb_wrapper"><a><img src="@Url.Content(@product.ImagePath)" alt="image 1" /></a></div>
            <h3>@product.ProductName</h3>
            <p>@product.Description</p>
        </div>
    }
    <div class="button_01"><a href="#">View All</a></div>
    <div class="cleaner"></div>
</div>

SearchProducts-控制器动作

[HttpPost]
        public ActionResult SearchProducts()
        {
            var searchTxt = Request.Form["SearchText"];                                                
            IEnumerable<Product> searchedProducts …

AJAX call - 

这里countryId作为"AU"传递 - 例如 -

$("#Countries").change(function () {
        var countryId = this.value;
        $.ajax({
            url: '/Registers/GetStates',
            type: "POST",
            data: { 'data': countryId },
            success: function (states) {
                $("#States").html(""); // clear before appending new list 
                $.each(states, function (i, state) {
                    $("#States").append(
                        $('<option></option>').val(state.Id).html(state.Name));
                });
            }
        });
    });

调用GetStates方法后,'countryId'始终在控制器方法中作为null传递.不知道我在这里缺少什么.我也尝试了JSON.Stringify({'data':countryId}).谁能帮我吗 ？

Controller Action - 

[HttpPost]
public SelectList GetStates(string countryId)
{
     return Helper.GetStates(countryId);
}

IHttpControllerSelector和IHttpControllerActivator有什么区别？