C# 对于Hasura上的GraphQL，C中的Fetch（）等价物

我试图学习应用于.NETC的GraphQL

我的目标是转换此javascript代码：

fetch('https://____.herokuapp.com/v1/graphql', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Accept': 'application/json',
  },
  body: JSON.stringify({query: " {test {qqch date}}"})
})
  .then(r => r.json())
  .then(data => console.log('data returned:', data)); 

，改为C。这就是我现在所处的位置，但不能再进一步了：

    //Define your baseUrl
    string baseUrl = "https://_____.herokuapp.com/v1/graphql";
    var json = JsonConvert.SerializeObject("{test {qqch date}}"); 

    StringContent httpContent = new StringContent(json, Encoding.UTF8, "application/json");


    //Have your using statements within a try/catch block
    try
    {
        //We will now define your HttpClient with your first using statement which will use a IDisposable.
        using (HttpClient client = new HttpClient())
        {
            //In the next using statement you will initiate the Get Request, use the await keyword so it will execute the using statement in order.
            using (HttpResponseMessage res = await client.PostAsync(baseUrl, httpContent))
            {
                //Then get the content from the response in the next using statement, then within it you will get the data, and convert it to a c# object.
                using (HttpContent content = res.Content)
                {
                    //Now assign your content to your data variable, by converting into a string using the await keyword.
                    var data = await content.ReadAsStringAsync();

                    //If the data isn't null return log convert the data using newtonsoft JObject Parse class method on the data.
                    if (data != null)
                    {
                        //Now log your data in the console
                        Console.WriteLine("data------------{0}", data);
                        Console.ReadKey();

                    }
                    else
                    {
                        Console.WriteLine("NO Data----------");
                        Console.ReadKey();

                    }
                }
            }
        }
    }
    catch (Exception exception)
    {
        Console.WriteLine("Exception Hit------------");
        Console.WriteLine(exception);
        Console.ReadKey();
    }

谁能告诉我我做错了什么

当我运行javascript代码时，我没有问题。当我运行C代码时，我从Hasura那里得到以下消息： {错误：[{扩展名：{path:$，代码：解析失败}，消息：解析类型为Hasura.GraphQL.Transport.HTTP.Protocol.GQLReq的构造函数GQLReq时，需要对象，但得到字符串。}]}

body: JSON.stringify({query: " {test {qqch date}}"})

所以body={\query\：{test{qqch date}}}

var json=JsonConvert.SerializeObject{query:{test{qqch date}}}； 但是在您的c代码中，json=\{query:{test{qqch date}}}\

---

您可以硬编码json字符串。或者研究使用JsonConvert.SerializeObject将c类型转换为json字符串的其他方法。

您的JS使用查询。你的C没有。我已经用：var json=JsonConvert.SerializeObject{query:{test{qqch date}}}；但没用，干得好。。管理油井是解决方案。