通过jQuery AJAX将对象数组传递给控制器​​，动作数据在ASP.NET Core 2.2 MVC中始终为空-它与.NET Framework 4.5一起使用 [英] Pass array of objects to controller by jQuery AJAX, action data is always null in ASP.NET Core 2.2 MVC - it is working with .NET Framework 4.5

问题描述

我在一个项目中工作，我需要使用ajax调用来保存页面中包含订单详细信息的对象数据.当我将项目与.NET Framework 4.5版一起使用时，它可以很好地工作-但是，当我使用ASP.NET Core MVC时，它不能工作.有什么帮助吗?

I am working in project that I need to use ajax call to save object data from my page witch contain order details. When I use project with .NET framework version 4.5, it is working very well - but when I use ASP.NET Core MVC, it is not working. Any help please?

我确实尝试过类似问题中的每件事，但是它们没有起作用.例如，我使用符号[frombody]-但我仍然遇到相同的问题.

I did try every thing in similar questions but they did not work. For example I use notation [frombody] - but I still have the same problem.

我有以下控制器操作:

public ActionResult CreateOrders([FromBody] T_POS_ENT_ORDER_DETIALS_Temp []T_POS_ENT_ORDER_Data)
{
    GRepository<T_POS_ENT_ORDER_DETIALS_Temp> t_pos_ent_orderOpr = new GRepository<T T_POS_ENT_ORDER_DETIALS_Temp>();

    T_POS_ENT_ORDER_Data.order_Date = DateTime.Now;
    t_pos_ent_orderOpr.Add(T_POS_ENT_ORDER_Data);

    return Json(new { msg = "Successfully added " }); 
}

我有以下ajax调用:

And I have the following ajax call:

    var DATA = [];
    DATA.push({ LocPrice: "12" });
    DATA.push({ LocProductID: "1002" });
    DATA.push({ discount: "0" });
    DATA.push({ posNumber: "1" });
    DATA.push({ productName: "soap" });
    DATA.push({ productQynt: "1" });
    $.ajax({

    url: '/AjaxT_POS_ENT_ORDER/CreateOrders',
    data: JSON.stringify({ 'billArray': DATA }),
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    type: "POST",
    async: false,

    success: OnSuccess,

  });

我也有这个课程:

public class T_POS_ENT_ORDER_DETIALS_Temp
{
    public string LocPrice { get; set; }
    public string LocProductID { get; set; }
    public string discount { get; set; }
    public string  posNumber { get; set; }
    public string productName { get; set; }
    public int productQynt { get; set; }
}

没有错误显示仅订单明细始终为空...

There is no error showing only the order details is always null ...

推荐答案

我正在.Net Core 3.1中工作，这对我有用:

I'm working in .Net Core 3.1 and this works for me:

1.控制器

尝试使用 [FromForm] ，而不是 [FromBody]

    [HttpPost]
    public ActionResult CreateOrdersPOSTObject([FromForm] List<T_POS_ENT_ORDER_DETIALS_Temp> prm)
    {
        //your logic...
        return Json(new { msg = "Successfully added " });
    }

2. AJAX通话

不应使用 JSON.stringfy()或 contentType .

            var DATA = [];
            DATA.push({ LocPrice: "12", LocProductID: "1002", discount: "0", posNumber: "1", productName: "soap", productQynt: "1" });
            DATA.push({ LocPrice: "23", LocProductID: "1003", discount: "0", posNumber: "1", productName: "shampoo", productQynt: "1" });
            DATA.push({ LocPrice: "7",LocProductID: "1004" ,discount: "0",posNumber: "2" ,productName: "sponge",productQynt: "2"});

            $.ajax({
                url: '@Url.Content("~/home/CreateOrdersPOSTObject")',
                data: { "prm": DATA },
                type: "POST",
                dataType: "json",
                async: true
            });

或者，如果您愿意，也可以使用速记 $.post 获得相同的结果

Or if you prefer, you can use the shorthand $.post with the same results

            var DATA = [];
            DATA.push({ LocPrice: "12", LocProductID: "1002", discount: "0", posNumber: "1", productName: "soap", productQynt: "1" });
            DATA.push({ LocPrice: "23", LocProductID: "1003", discount: "0", posNumber: "1", productName: "shampoo", productQynt: "1" });
            DATA.push({ LocPrice: "7",LocProductID: "1004" ,discount: "0",posNumber: "2" ,productName: "sponge",productQynt: "2"});

            $.post(
                '@Url.Content("~/home/CreateOrdersPOSTObject")',
                { "prm": DATA },
                function () {
                  alert( "success" );
                })
              .fail(function() {
                alert( "error" );
              });

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