c# - 在 Xamarin 中发布 Json 字符串

Question

在我的应用程序中，我以这种方式将 json 字符串发布到服务器:

string url = "my/url";
        HttpClient newClient = new HttpClient();

        string contentType = "application/json";
        JObject json = new JObject
        {
            { "id", "id" },
            { "apiKey", "apiKey" },
            { "EncryptedData", Data }
        };

        var jon = JsonConvert.SerializeObject(json);
        var content = new StringContent(jon, Encoding.UTF8, contentType);
        var TaskPostAsync = await newClient.PostAsync(url, content);


        if (TaskPostAsync.IsSuccessStatusCode)
        {
            var contentString = await TaskPostAsync.Content.ReadAsStringAsync();}

我收到的回复是它不是 Json 格式。我哪里错了。任何帮助将非常感激。数据是一个字符串。

Answer 1

通过调用

 var jon = JsonConvert.SerializeObject(json);

你正在序列化它两次。

JObject 已经是 JSON，所以您需要做的就是调用 .ToString 来获取 JSON

//...

JObject json = new JObject
{
    { "id", "id" },
    { "apiKey", "apiKey" },
    { "EncryptedData", Data }
};

var content = new StringContent(json.ToString(), Encoding.UTF8, contentType);

//...

引用 Write JSON text with JToken.ToString

另一种选择是使用匿名对象然后序列化它

//...

var model = new {
    id = "id",
    apiKey = "apiKey",
    encryptedData = Data
};

var json = JsonConvert.SerializeObject(model);
var content = new StringContent(json, Encoding.UTF8, contentType);

//...