在ASP.Net中解析JSON对象数组

I am trying to learn ASP.Net MVC and I wanted to post array of JSON objects to the server and sent it back to the client side. Everything is fine when I use Postman, but it doesn't work on actual web page. I think the problem is either with jQuery code that posts the array or ASP.Net code that is not able to parse the array.

我正在尝试学习ASP.Net MVC，我想将JSON对象数组发布到服务器并将其发送回客户端。当我使用Postman时，一切都很好，但它在实际的网页上不起作用。我认为问题是发布数组的jQuery代码或无法解析数组的ASP.Net代码。

Here is my controller code:

这是我的控制器代码：

[System.Web.Mvc.HttpPost]
public ActionResult GetResult(List<Table> list)
{
    return Json(list);
}

Here is my object declaration:

这是我的对象声明：

public class Table
{
    public int Id { get; set; }
    public String Question { get; set; }
    public int Answer { get; set; }
}

Here is jQuery code that posts the data:

这是发布数据的jQuery代码：

$.post("./GetResult", JSON.stringify(tableData), function (data, status) { alert(status); }, "json");

and tableData is an Array of JSON like this:

和tableData是一个JSON数组，如下所示：

[
    {
        "Id": 500,
        "Question": "where are you from",
        "Answer": 2
    },
    {
        "Id": 501,
        "Question": "how old are you",
        "Answer": 1
    },
    {
        "Id": 502,
        "Question": "what is your first car",
        "Answer": 2
    },
    {
        "Id": 503,
        "Question": "do you have kids",
        "Answer": 1
    }
]

Also, I can see that my code goes through the post controller but it is empty or null.

此外，我可以看到我的代码通过post控制器，但它是空的或null。

Here is the link of my csHTML file.

这是我的csHTML文件的链接。

3 个解决方案

#1

Try to specify content-type in your request:

尝试在您的请求中指定内容类型：

$.ajax({
  url: "./GetResult",
  type: "POST",
  data: JSON.stringify(tableData),
  contentType: "application/json; charset=utf-8",
  dataType: "json",
  success: function (data, status) { alert(status); }
})

#2

There is no need to JSON.stringify in your $.post call. Let jQuery handle that for you.

您的$ .post调用中不需要JSON.stringify。让jQuery为您处理。

#3

$.post("./GetResult", {list:tableData},
    function (data, status) 
    { 
        alert(status); 
    }
, "json");

Json never passed object.

Json从未传递过对象。

using Newtonsoft.Json;
[HttpPost]
Public ActionResult GetResult(string list)
{
    var obj = JsonConvert.DeserializeObject<List<Table>>(strStatus);
    return Json(list)
}

or

要么

$.ajax({
  url: "./GetResult",
  type: "POST",
  data: JSON.stringify(tableData),
  contentType: "application/json; charset=utf-8",
  dataType: "json",
  success: function (data, status) { alert(status); }
})