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一：WebAPI创建
using System;
using System.Collections.Generic; using System.Linq; using System.Net.Http; using System.Text.RegularExpressions; using System.Web; using System.Web.Http;namespace WebApplication1.Controllers
{ /// <summary> /// 控制器类 /// </summary> public class UserInfoController: ApiController { // /api/UserInfo/CheckUserName?_userName="admin"//以上是webAPI路由配置，对应WebAPIConfig.cs类（App_Startw文件夹中）
//其中api固定，可手动在WebAPIConfig里改， //UserInfo是控制器类（UserInfoController，简化成了UserInfo，框架中根据名称找到）， //CheckUserName是get、post、put、delete等方法的名称， //_userName是形参名称//检查用户名是否已注册
private ApiTools tool = new ApiTools(); [HttpPost] public HttpResponseMessage CheckUserName1(object _userName) { int num = UserInfoGetCount(_userName.ToString());//查询是否存在该用户 if (num > 0) { return tool.MsgFormat(ResponseCode.操作失败, "不可注册/用户已注册", "1 " + _userName); } else { return tool.MsgFormat(ResponseCode.成功, "可注册", "0 " + _userName); } // return new HttpResponseMessage { Content = new StringContent("bbb") }; ;//可直接返回字符串， }[HttpGet]
public HttpResponseMessage CheckUserName(string _userName) { int num = UserInfoGetCount(_userName);//查询是否存在该用户 if (num > 0) { return tool.MsgFormat(ResponseCode.操作失败, "不可注册/用户已注册", "1 " + _userName); } else { return new HttpResponseMessage { Content = new StringContent("aaa") }; ;//可直接返回字符串， return tool.MsgFormat(ResponseCode.成功, "可注册", "0 " + _userName);//也可返回json类型 } }private int UserInfoGetCount(string username)
{ //return Convert.ToInt32(SearchValue("select count(id) from userinfo where username='" + username + "'")); return username == "admin" ? 1 : 0; } } /// <summary> /// 响应类 /// </summary> public class ApiTools { private string msgModel = "{ {\"code\":{0},\"message\":\"{1}\",\"result\":{2}}}"; public ApiTools() { } public HttpResponseMessage MsgFormat(ResponseCode code, string explanation, string result) { string r = @"^(\-|\+)?\d+(\.\d+)?$"; string json = string.Empty; if (Regex.IsMatch(result, r) || result.ToLower() == "true" || result.ToLower() == "false" || result == "[]" || result.Contains('{')) { json = string.Format(msgModel, (int)code, explanation, result); } else { if (result.Contains('"')) { json = string.Format(msgModel, (int)code, explanation, result); } else { json = string.Format(msgModel, (int)code, explanation, "\"" + result + "\""); } } return new HttpResponseMessage { Content = new StringContent(json, System.Text.Encoding.UTF8, "application/json") }; } } /// <summary> /// 反馈码 /// </summary> public enum ResponseCode { 操作失败 = 00000, 成功 = 10200, }}
//
// Web API 路由
config.MapHttpAttributeRoutes();config.Routes.MapHttpRoute(
name: "DefaultApi", routeTemplate: "api/{controller}/{id}", defaults: new { id = RouteParameter.Optional } );二：httpclient调用webAPI
using Newtonsoft.Json;
using System; using System.Collections.Generic; using System.Linq; using System.Net.Http; using System.Net.Http.Headers; using System.Text; using System.Threading.Tasks; using System.Windows.Forms;namespace ConsoleTest
{ public class ApiHelper { /// <summary> /// api调用方法/注意一下API地址 /// </summary> /// <param name="controllerName">控制器名称--自己所需调用的控制器名称</param> /// <param name="overb">请求方式--get-post-delete-put</param> /// <param name="action">方法名称--如需一个Id(方法名/ID)(方法名/?ID)根据你的API灵活运用</param> /// <param name="obj">方法参数--如提交操作传整个对象</param> /// <returns>json字符串--可以反序列化成你想要的</returns> public static string GetApiMethod(string controllerName, string overb, string action, HttpContent obj ) { Task<HttpResponseMessage> task = null; string json = ""; HttpClient client = new HttpClient(); client.BaseAddress = new Uri("http://localhost:51353/api/" + controllerName + "/"); switch (overb) { case "get": task = client.GetAsync(action); break; case "post": task = client.PostAsync(action, obj); break; case "delete": task = client.DeleteAsync(action); break; case "put": task = client.PutAsync(action, obj); break; default: break; } task.Wait(); var response = task.Result; //MessageBox.Show(response.ToString()); if (response.IsSuccessStatusCode) { var read = response.Content.ReadAsStringAsync(); read.Wait(); json = read.Result; } return json; } public static HttpContent GetContent( object model) { var body = JsonConvert.SerializeObject(model, Formatting.Indented, new JsonSerializerSettings() { NullValueHandling = NullValueHandling.Ignore }); var content = new StringContent(body, Encoding.UTF8, "application/json"); content.Headers.ContentType = new MediaTypeHeaderValue("application/json"); return content; } } public class A { public string Value = "999"; } }//
using MySql.Data.MySqlClient;
using System; using System.Collections.Generic; using System.Data; using System.Diagnostics; using System.Linq; using System.Net.Http; using System.Text; using System.Threading; using System.Threading.Tasks; using System.Windows.Forms;namespace ConsoleTest
{ class Program { static void Main(string[] args) { try { // HttpContent httpContent = ApiHelper.GetContent(new A().Value); HttpContent httpContent = ApiHelper.GetContent("admin"); string jsonStr= ApiHelper.GetApiMethod("UserInfo", "post", "CheckUserName1", httpContent); Console.WriteLine(jsonStr); Console.ReadKey(); } catch(Exception ee) { MessageBox.Show(ee.ToString()); } return;转载地址：http://pnlws.baihongyu.com/