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所属分类：.NET技术
前端js可以使用ajax、axios发出http请求
在c#中winform、控制台等可以通过WebRequest、WebClient、HttpClient
有关三个类的性能对比大家可以自己搜一下，这里我主要使用和封装了HttpClient类，对于ResultDto大家可以根据所需进行修改或删除
public class HttpHelper { private static readonly object LockObj = new object(); private static HttpClient client = null; private static readonly string BASE_ADDRESS = "http://localhost:1229/"; public HttpHelper() { GetInstance(); } /// <summary> /// 制造单例 /// </summary> /// <returns></returns> public static HttpClient GetInstance() { if (client == null) { lock (LockObj) { if (client == null) { client = new HttpClient() { BaseAddress = new Uri(BASE_ADDRESS) }; } } } return client; } /// <summary> /// 异步Post请求 /// </summary> /// <param name="url">请求地址</param> /// <param name="strJson">传入的数据</param> /// <returns></returns> public async Task<string> PostAsync(string url,string strJson) { try { HttpContent content = new StringContent(strJson); content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json"); HttpResponseMessage res = await client.PostAsync(url,content); if (res.StatusCode == System.Net.HttpStatusCode.OK) { string resMsgStr = await res.Content.ReadAsStringAsync(); return resMsgStr; } else { return null; } } catch (Exception) { return null; } } /// <summary> /// 同步Post /// </summary> /// <param name="url"></param> /// <param name="strJson"></param> /// <returns></returns> public string Post(string url, string strJson) { try { HttpContent content = new StringContent(strJson); content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json"); //client.DefaultRequestHeaders.Connection.Add("keep-alive"); //由HttpClient发出Post请求 Task<HttpResponseMessage> res = client.PostAsync(url, content); if (res.Result.StatusCode == System.Net.HttpStatusCode.OK) { string resMsgStr = res.Result.Content.ReadAsStringAsync().Result; return resMsgStr; } else { return null; } } catch (Exception ex) { return null; } } /// <summary> /// 异步Post请求 /// </summary> /// <typeparam name="TResult">返回参数的数据类型</typeparam> /// <param name="url">请求地址</param> /// <param name="data">传入的数据</param> /// <returns></returns> public async Task<TResult> PostAsync<TResult>(string url, object data) { try { var jsonData = JsonConvert.SerializeObject(data); HttpContent content = new StringContent(jsonData); content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json"); HttpResponseMessage res = await client.PostAsync(url, content); if (res.StatusCode == System.Net.HttpStatusCode.OK) { string resMsgStr = await res.Content.ReadAsStringAsync(); var result= JsonConvert.DeserializeObject<ResultDto<TResult>>(resMsgStr); return result != null ? result.Data : default; } else { MessageBox.Show(res.StatusCode.ToString()); return default; } } catch (Exception ex) { MessageBox.Show(ex.Message); return default; } } /// <summary> /// 同步Get请求 /// </summary> /// <param name="url">请求地址</param> /// <returns></returns> public string Get(string url) { try { var responseString = client.GetStringAsync(url); return responseString.Result; } catch (Exception ex) { return null; } } /// <summary> /// 异步Get请求 /// </summary> /// <param name="url">请求地址</param> /// <returns></returns> public async Task<string> GetAsync(string url) { try { var responseString =await client.GetStringAsync(url); return responseString; } catch (Exception ex) { return null; } } /// <summary> /// 异步Get请求 /// </summary> /// <typeparam name="TResult">返回参数的数据</typeparam> /// <param name="url">请求地址</param> /// <returns></returns> public async Task<TResult> GetAsync<TResult>(string url) { try { var resMsgStr = await client.GetStringAsync(url); var result = JsonConvert.DeserializeObject<ResultDto<TResult>>(resMsgStr); return result != null ? result.Data : default; } catch (Exception ex) { return default(TResult); } } } public class ResultDto<TResult> { public string Msg { get; set; } public TResult Data { get; set; } public bool Success { get; set; } } } 记录我在博客园发布的第一篇文章，后续会把本人在csdn的文章都迁移过来
https://blog.csdn.net/hyx1229
