c# http post json

以下是使用C#进行HTTP POST请求发送JSON数据的示例代码：

using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

public class Program
{
    public static async Task Main()
    {
        string url = "http://192.168.001.110:8086/api/v1/settimecfg";
        string json = "{\"day\":8,\"hour\":15,\"min\":42,\"month\":5,\"sec\":15,\"week\":1,\"year\":2023}";

        using (HttpClient client = new HttpClient())
        {
            StringContent content = new StringContent(json, Encoding.UTF8, "application/json");

            HttpResponseMessage response = await client.PostAsync(url, content);

            if (response.IsSuccessStatusCode)
            {
                string result = await response.Content.ReadAsStringAsync();
                Console.WriteLine(result);
            }
            else
            {
                Console.WriteLine("HTTP POST request failed with status code: " + response.StatusCode);
            }
        }
    }
}

请注意，上述代码中的`url`变量是目标URL，`json`变量是要发送的JSON数据。使用`HttpClient`类进行POST请求，并将JSON数据作为请求的内容发送。如果请求成功，将打印出响应的结果；如果请求失败，将打印出错误信息。