通过jQuery将JSON数据发布到ASP .NET MVC 4控制器操作

Question

我在尝试将复杂的JSON对象传递给MVC 4控制器操作时遇到了麻烦.由于JSON内容是可变的,我不希望MVC将JSON的各个属性/元素映射到action方法的参数列表中的参数.我只想在控制器操作中将数据作为单个JSON字符串参数获取.

这是我的动作方法的签名:

    [HttpPost]
    [ValidateInput(false)]
    public string ConvertLogInfoToXml(string jsonOfLog)

这是我尝试从我的浏览器发布一些JSON数据:

    data = {prop: 1, myArray: [1, "two", 3]}; 
    //'data' is much more complicated in my real application
    json = {jsonOfLog: data};

    $.ajax({
        type: 'POST',
        url: "Home/ConvertLogInfoToXml",
        data: JSON.stringify(json),
        success: function (returnPayload) {
            console && console.log ("request succeeded");
        },
        error: function (xhr, ajaxOptions, thrownError) {
            console && console.log ("request failed");
        },
        dataType: "xml",
        contentType: "application/json",            
        processData: false,
        async: false
    });

当我在ConvertLogInfoToXML方法的开头点击断点时,jsonOfLog为空.

如果我更改了JavaScript中设置的'json'变量,以使jsonOfLog属性成为一个简单的字符串,例如:

json = { jsonOfLog: "simple string" };

然后当我在ConvertLogInfoToXML方法开头的断点被命中时,jsonOfLog是字符串的值(例如"简单字符串").

我尝试将action方法中的jsonOfLog参数的类型更改为object类型:

    [HttpPost]
    [ValidateInput(false)]
    public string ConvertLogInfoToXml(object jsonOfLog)

现在,使用原始的JavaScript代码(我传递一个更复杂的'数据'对象),jsonOfLog获取{object}的值.但是调试器在监视窗口中没有显示任何更多细节,我不知道我可以用什么方法来操作这个变量.

如何将JSON数据传递给MVC控制器,其中传递的数据是字符串化的复杂对象？

谢谢,Notre

Answer 1

问题是您dataType和data参数的格式.我刚刚在沙箱中测试了这个,以下工作:

C#

    [HttpPost]
    public string ConvertLogInfoToXml(string jsonOfLog)
    {
        return Convert.ToString(jsonOfLog);
    }

JavaScript的

<input type="button" onclick="test()"/>

    <script type="text/javascript">

        function test() {
            data = { prop: 1, myArray: [1, "two", 3] };
            //'data' is much more complicated in my real application
            var jsonOfLog = JSON.stringify(data);

            $.ajax({
                type: 'POST',
                dataType: 'text',
                url: "Home/ConvertLogInfoToXml",
                data: "jsonOfLog=" + jsonOfLog,
                success: function (returnPayload) {
                    console && console.log("request succeeded");
                },
                error: function (xhr, ajaxOptions, thrownError) {
                    console && console.log("request failed");
                },

                processData: false,
                async: false
            });
        }

    </script>

请特别注意data,在发送文本时,您需要发送与参数名称匹配的变量.它不漂亮,但它会让你梦寐以求的无格式字符串.

运行时,jsonOfLog在服务器函数中看起来像这样:

    jsonOfLog   "{\"prop\":1,\"myArray\":[1,\"two\",3]}"    string

HTTP POST标头:

Key Value
Request POST /Home/ConvertLogInfoToXml HTTP/1.1
Accept  text/plain, */*; q=0.01
Content-Type    application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With    XMLHttpRequest
Referer http://localhost:50189/
Accept-Language en-US
Accept-Encoding gzip, deflate
User-Agent  Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)
Host    localhost:50189
Content-Length  42
DNT 1
Connection  Keep-Alive
Cache-Control   no-cache
Cookie  EnableSSOUser=admin

HTTP POST正文:

jsonOfLog={"prop":1,"myArray":[1,"two",3]}

响应头:

Key Value
Cache-Control   private
Content-Type    text/html; charset=utf-8
Date    Fri, 28 Jun 2013 18:49:24 GMT
Response    HTTP/1.1 200 OK
Server  Microsoft-IIS/8.0
X-AspNet-Version    4.0.30319
X-AspNetMvc-Version 4.0
X-Powered-By    ASP.NET
X-SourceFiles   =?UTF-8?B?XFxwc2ZcaG9tZVxkb2N1bWVudHNcdmlzdWFsIHN0dWRpbyAyMDEyXFByb2plY3RzXE12YzRQbGF5Z3JvdW5kXE12YzRQbGF5Z3JvdW5kXEhvbWVcQ29udmVydExvZ0luZm9Ub1htbA==?=

响应机构:

{"prop":1,"myArray":[1,"two",3]}