发帖JSON到MVC控制器 - 字符串参数为null [英] posting JSON to MVC controller - String parameter is null

问题描述

我故意尽量不使用控制器参数绑定，所以我有一个控制器，它看起来像：

I am intentionally trying NOT to use a binding in the controller parameter, so I have a controller that looks like:

 [HttpPost]
        public ActionResult UntypedForm(String serializedformdata)
        {
        //// ...
        }

当我张贴的JSON序列化表单元素与低于code控制器：

When I post serialized JSON form elements to the controller with the below code:

var formelements = $('#form').serializeArray();
$.post(url, formelements, function (data) {

    }, "json").error(function () {
        alert("Error posting to " + url); 
    });

我得到的字符串serializedformdata我控制器上的NULL值。然而，当我与一个强类型的对象替换字符串serializedformdata，如预期正常结合的作品。

I get a NULL value for String serializedformdata on my controller. However, when I replace String serializedformdata with a strongly-typed object, binding works properly as expected.

我的控制器整点是通用的JSON的帖子，在这里我将创建一个文件BSON放置到一个蒙戈数据库。 SO ....我故意不想要模型绑定，我想序列化的字符串作为pamameter。为什么我的serializedformdata字符串空当我张贴？

The whole point of my controller is generic JSON posts, where I will create a BSON document to place into a Mongo database. SO....I intentionally DO NOT want model binding and I want the serialized string as pamameter. Why is my serializedformdata string null when I post?

请注意 - 我也试图绑定到词典以

Note - I also tried to bind to Dictionary with

public ActionResult UntypedForm(Dictionary<string,string> serializedformdata)
            {
            //// ...
            }

但serializedformdata仍然是空。

but serializedformdata is still null.

推荐答案

功能 serializeArray 创建了窗体的键/值对的Javascript对象。你不希望出现这种情况，你想与 serializedformdata =（JSON字符串）一个键/值。也就是说，这样的;

The function serializeArray creates a Javascript object with the form's key/value pairs. You don't want that, you want a single key/value with serializedformdata = (JSON string). Ie, like this;

var formelements = { serializedformdata: JSON.stringify($('#form').serializeArray()) };

这传递的原始JSON字符串到控制器的参数。您可以使用的JavaScriptSerializer 来获取服务器上的对象：

This passes the raw JSON string to the controller's parameter. You can use the JavaScriptSerializer to get the object on the server:

var obj = (List<Dictionary<string,string>>)new JavaScriptSerializer().Deserialize(serializedformdata, typeof(List<Dictionary<string,string>>));
Dictionary<string,string> dict = obj.First();
string someval = dict["somekey"];

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