ASP.NET 5控制器方法无法接收JSON POST，ASP.NET 4控制器方法却可以 [英] ASP.NET 5 Controller method can't receive JSON POST, ASP.NET 4 controller method does

问题描述

我一直在把头发剪掉。我有两个项目，一个运行 ASP.NET 4 ，另一个运行 ASP.NET 5 RC1

I have been tearing my hair out over this one. I have two projects one running ASP.NET 4 and the other ASP.NET 5 RC1

ASP.NET 5 项目控制器接收到的 POST 方法输入参数均为默认值

The ASP.NET 5 project controller received POST method input parameters are all default and not the values as sent from the webpage.

为了缩小问题的范围，我简化了控制器中的 POST 方法两个项目

To narrow down the problem I simplified the controllers POST methods in both projects

[HttpPost]
public JsonResult DataHandler(int Draw)
{
    //above Draw variable not set
}

并在捕获方法上设置一个断点变量 Draw 。该网页发送 Draw 参数的值为1的JSON帖子。但是，在ASP.NET 5中，该值为0（默认值），并且我发送的其他参数为空而不是具有值。在 ASP.NET 4中是正确的。

and put a break point on the method to catch the variable Draw. The webpage sends a JSON post with a value of 1 for the Draw parameter. However in ASP.NET 5 that values is 0 (default) and other parameters I send are null instead of having values. In 'ASP.NET 4' it is correct.

我正在使用 jquery数据表和与所使用的相同的代码在此 ASP.NET 4 项目

I am using jquery datatables and the same code as used in this ASP.NET 4 project

var oTable = $('#datatab').DataTable({
    "serverSide": true,
    "ajax": {
        "type": "POST",
        "url": '/Home/DataHandler',
        "contentType": 'application/json; charset=utf-8',
        'data': function (data) { return data = JSON.stringify(data); }
    },
    "dom": 'frtiS',
    "scrollY": 500,
    "scrollX": true,
    "scrollCollapse": true,
    "scroller": {
        loadingIndicator: false
    },
    "processing": true,
    "paging": true,
    "deferRender": true,
    "columns": [
   { "data": "Name" },
   { "data": "City" },
   { "data": "Postal" },
   { "data": "Email" },
   { "data": "Company" },
   { "data": "Account" },
   { "data": "CreditCard" }
    ],
    "order": [0, "asc"]
});

我使用了 Fiddler 并比较了<$项目发送给控制器的c $ c> JSON 和 JSON 内容都发布到 / Home / DataHandler 两者完全相同，即 Draw = 1 。

I used Fiddler and compared the JSON sent by both project to the controller and the JSON content posted to the /Home/DataHandler for both are the exact same i.e. Draw=1.

{ draw：1， columns：[{ data： Name， name：， searchable：true， orderable：true， search：{ value：， regex：false}}，{ data： City， name：， searchable ：true， orderable：true， search：{ value：， regex：false}}，{ data： Postal， name：， searchable： true， orderable：true， search：{ value：， regex：false}}，{ data： Email， name：， searchable：true， orderable：true， search：{ value：， regex：false}}，{ data： Company， name：， searchable：true， orderable ：true， search：{ value：， regex：false}}，{ data： Account， name：， searchable：true， orderable： true， search：{ value：， regex：false}}，{ data： CreditCard， name：， searchable：true， orderable：true， search：{ value：， regex：false}}]， order：[{ column：0， dir： asc}]， start：0， length：126， search：{ value：， regex：false}}

{"draw":1,"columns":[{"data":"Name","name":"","searchable":true,"orderable":true,"search":{"value":"","regex":false}},{"data":"City","name":"","searchable":true,"orderable":true,"search":{"value":"","regex":false}},{"data":"Postal","name":"","searchable":true,"orderable":true,"search":{"value":"","regex":false}},{"data":"Email","name":"","searchable":true,"orderable":true,"search":{"value":"","regex":false}},{"data":"Company","name":"","searchable":true,"orderable":true,"search":{"value":"","regex":false}},{"data":"Account","name":"","searchable":true,"orderable":true,"search":{"value":"","regex":false}},{"data":"CreditCard","name":"","searchable":true,"orderable":true,"search":{"value":"","regex":false}}],"order":[{"column":0,"dir":"asc"}],"start":0,"length":126,"search":{"value":"","regex":false}}

我尝试过的事情。

• 我使用了相同的 html表内容和上面的代码 .js 项目之间的文件


• 将我的控制器输入参数设置为小写，例如绘制


• 比较 JSON POST 数据是相同的


• 在 POST 方法输入变量上放置一个断点以尽快捕获该值

• I used the same html table contents and above code .js file between projects
• Set my controller input parameter to lowercase e.g. draw
• Compare the JSON POST data in fiddler is the same
• Put a breakpoint on the POST method input variable to catch the value as soon as it is posted

推荐答案

添加 dataType：'json'到ajax调用

将 return data = JSON.stringify（data）替换为以下：

Replace return data = JSON.stringify(data) with the following:

return data.Draw = JSON.stringify(data)

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