MVC .net Core2 - 模型在控制器处为空(使用 Jquery ajax 时)

MVC .net Core2 - Model is null at controller (when using Jquery ajax)

我正在使用 asp.net core2 和 jquery ajax

我正在使用 Jquery ajax 到 post 控制器。但是,在控制器操作中,所有值均为 null

然而,当我尝试通过 ajax 将其 post 发送到服务器时,值显示为空 我做错了什么?

这是我的代码

更新: 现在没有控制器操作,我只是检查模型是否不 return null

从更新按钮 class 调用 Jquery 函数

  $('.Update_Class').click(function(e) {
        e.preventDefault(e);



function ehi(e) {

var fd = new FormData($("#Basket")[0]);
alert('Courtnery');

$.ajax({

    type: "POST",
    url: "/Shopping_Basket/Shops_AddToBasket_Update",//"/Shops/AddToBasket", //
    contentType: false,
    processData: false,
    data: fd,
    success: function (message) {

和查看页面

public class Shops_Basket
{
    [Key]
    public int BasketID { get; set; }
    [Required]
    public string UserName { get; set; }
    [Required]
    public int ProductID { get; set; }
    [Required]
    public DateTime Dates { get; set; }
    [Required]
    public int Quantity { get; set; }
    [Required]
    public decimal Price_Unit { get; set; }

    public decimal Total { get; set; }



    public bool IsCompleted { get; set; }

    public Products products { get; set; }

    public decimal Basket_Total
    {
        get { return Quantity * Price_Unit; }
       // set { Basket_Total = Basket_Total; }
    }
    public decimal Invoice
    {
        get { return Quantity * Price_Unit; }
        // set { Basket_Total = Basket_Total; }
    }

最后是查看页面

 <thead>
    <tr>

        <th>
            @Html.DisplayNameFor(model => model.Dates)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Quantity)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Price_Unit)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Total)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.IsCompleted)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.products)
        </th>
        <th></th>
    </tr>
</thead>
<tbody>
    @foreach (var item in Model) {
    <tr>

        <td>
            @Html.DisplayFor(modelItem => item.Dates) 
            <img src="/images/Department_Categories/@(item.ProductID).png" alt="@(item.products.Product_Name)" class="img-fluid img-thumbnail_50 rounded" />
        </td>
        <td>
            <input asp-for="@item.Quantity" class="col-2 form-control75 col-md-5" type="number" autocomplete="off" style="width:20px;" min="1" size="5" max="10000" value="1" />

            <input type="hidden" asp-for="@item.ProductID" class="ProductID" />
            <input class="Update_Class" id="Update" type="submit" value="Update" name="Submit" />
        <td>
            @Html.DisplayFor(modelItem => item.Price_Unit)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Total)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.IsCompleted)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.products.ProductID)
        </td>
        <td>
            <a asp-action="Edit" asp-route-id="@item.BasketID">Edit</a> |
            <a asp-action="Details" asp-route-id="@item.BasketID">Details</a> |
            <a asp-action="Delete" asp-route-id="@item.BasketID">Delete</a>
        </td>
    </tr>

我解决了这个问题,我删除了 formdata 部分(发送整个表单)并将其作为 Json 类型发送,这是最终代码

type: "POST",
    url: "/shops/test",   
    dataType: 'json',
    data: data,
success: function (message) {