发送POST请求时无效的JSON原语 [英] Invalid JSON primitive when sending POST request

问题描述

我有以下ajax请求，正在尝试将JSON对象发送到服务器:

I have the following ajax request in which I'm trying to send a JSON Object to the server:

function sendData(subscriptionJson) {




                $.ajax({
                    type: "POST",
                    url: '@Url.Action("SubscribeSecurities", "Subscription")',
                    data: "{'subscriptions': subscriptionJson}",
                    contentType: "application/json; charset=utf-8",
                    dataType: "json",
                    success: function (response) {
                        console.log("success response: " + response.responseText);
                        alert("Hello: " + response.Name + " .\nCurrent Date and Time: " + response.DateTime);

                    },
                    failure: function (response) {
                        console.log("failure response: " + response.responseText);
                        alert(response.responseText);
                    },
                    error: function (response) {
                        console.log("error response: " + response.responseText);
                        alert(response.responseText);
                    }
                });


            }

基于此帖子中的最佳答案，我在数据"属性，但出现错误，提示无法识别"subscriptionJSON".我试过使用示例字符串进行测试，就像在帖子中所做的那样:data:"{'foo':'foovalue', 'bar':'barvalue'}",，但是当控制器获取subscriptionJson对象的参数时，该参数为null.

Based on the top answer in this post I added quotes around the "data" attribute, but I'm getting an error saying that the "subscriptionJSON" isn't being recognized. I tried testing with a sample string as is done in the post: data: "{'foo':'foovalue', 'bar':'barvalue'}", but when the controller gets the parameter of the subscriptionJson object it is null.

通过POST请求将JSON对象发送到ASP .NET MVC控制器的正式方法是什么?

推荐答案

您的问题是因为您没有发送有效的JSON.您需要将密钥用双引号引起来.另外，subscriptionJson是代码中的文字字符串.您需要将其作为字符串变量.

Your issue is because you're not sending valid JSON. You need to wrap the keys in double quotes. Also, subscriptionJson is a literal string in your code. You need it to be a string variable.

data: '{"subscriptions": ' + subscriptionJson + '}',

或者更好的是，只需为jQuery提供一个普通对象，然后让它为您编码值即可:

Or, even better, just provide a plain object to jQuery and let it encode the values for you:

data: { subscriptions: subscriptionJson },

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