C#使用HttpClient发送get或post请求

最新推荐文章于 2025-10-28 14:51:07 发布

原创最新推荐文章于 2025-10-28 14:51:07 发布 · 2.8k 阅读

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CC 4.0 BY-SA版权

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#c# #json #开发语言

这个博客展示了如何在C#中利用HttpClient类进行POST和GET数据的操作。代码包括了发送JSON对象的POST请求和带有查询参数的GET请求，是进行异步HTTP通信的基础示例。

代码例子如下：

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;

namespace ConsoleAppClient
{
    public class HttpHelper
    {

        public static string PostData(string url, object jsonOBJ)
        {
            string postResponse = "";

            try
            {
                using (HttpClient hpc = new HttpClient())
                {
                    //hpc.BaseAddress = new Uri(url);
                    HttpContent httpContent = new StringContent(Newtonsoft.Json.JsonConvert.SerializeObject(jsonOBJ));
                    httpContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");

                    postResponse = hpc.PostAsync(url, httpContent).Result.Content.ReadAsStringAsync().Result;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }

            return postResponse;
        }

        public static string GetData(string url, Dictionary<string, string> dic)
        {
            string getResponse = "";
            try
            {
                using (HttpClient hpc = new HttpClient())
                {
                    string para = "?";
                    foreach (var item in dic)
                    {
                        para += string.Format("{0}={1}&", item.Key, item.Value);
                    }
                    para = para.TrimEnd('&');

                    if (dic.Count == 0)
                    {
                        para = para.TrimEnd('?');
                    }

                    hpc.BaseAddress = new Uri(url);
                    getResponse = hpc.GetAsync(para).Result.Content.ReadAsStringAsync().Result;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            return getResponse;
        }

    }



}

HttpClient还可以做异步的请求发送，有时间再慢慢研究