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小編給大家分享一下.Net整合Json如何實現REST服務客戶端,希望大家閱讀完這篇文章之后都有所收獲,下面讓我們一起去探討吧!
一. 準備工作
1. 點擊官網 或 本地 下載支持.Net4.0 的Json插件 Newtonsoft.Json
2. 找到 %壓縮包%\Bin\net40\Newtonsoft.Json.dll ,在工程中引用
二. 相關代碼介紹
1. HttpClientUtil.cs 封裝REST方法
using Newtonsoft.Json; using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Net; using System.Text; namespace psi.Common { public class HttpClientUtil { // REST @GET 方法,根據泛型自動轉換成實體,支持List<T> public static T doGetMethodToObj<T>(string url) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.Method = "get"; request.ContentType = "application/json;charset=UTF-8"; HttpWebResponse response = null; try { response = (HttpWebResponse)request.GetResponse(); } catch (WebException e) { response = (HttpWebResponse)e.Response; return default(T); } string json = getResponseString(response); return JsonConvert.DeserializeObject<T>(json); } // 將 HttpWebResponse 返回結果轉換成 string private static string getResponseString(HttpWebResponse response) { string json = null; using (StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8"))) { json = reader.ReadToEnd(); } return json; } // 獲取異常信息 private static string getRestErrorMessage(HttpWebResponse errorResponse) { string errorhtml = getResponseString(errorResponse); string errorkey = "UnhandledException:"; errorhtml = errorhtml.Substring(errorhtml.IndexOf(errorkey) + errorkey.Length); errorhtml = errorhtml.Substring(0, errorhtml.IndexOf("\n")); return errorhtml; } // REST @POST 方法 public static T doPostMethodToObj<T>(string url, string jsonBody) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.Method = "post"; request.ContentType = "application/json;charset=UTF-8"; var stream = request.GetRequestStream(); using (var writer = new StreamWriter(stream)) { writer.Write(jsonBody); writer.Flush(); } HttpWebResponse response = (HttpWebResponse)request.GetResponse(); string json = getResponseString(response); return JsonConvert.DeserializeObject<T>(json); } // REST @PUT 方法 public static string doPutMethod(string url) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.Method = "put"; request.ContentType = "application/json;charset=UTF-8"; HttpWebResponse response = (HttpWebResponse)request.GetResponse(); using (StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8"))) { return reader.ReadToEnd(); } } // REST @PUT 方法,帶發送內容主體 public static T doPutMethodToObj<T>(string url, string jsonBody) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.Method = "put"; request.ContentType = "application/json;charset=UTF-8"; request.Timeout = 30 * 1000; var stream = request.GetRequestStream(); using (var writer = new StreamWriter(stream)) { writer.Write(jsonBody); writer.Flush(); } HttpWebResponse response = (HttpWebResponse)request.GetResponse(); string json = getResponseString(response); return JsonConvert.DeserializeObject<T>(json); } // REST @DELETE 方法 public static bool doDeleteMethod(string url) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.Method = "delete"; request.ContentType = "application/json;charset=UTF-8"; HttpWebResponse response = (HttpWebResponse)request.GetResponse(); using (StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8"))) { string responseString = reader.ReadToEnd(); if (responseString.Equals("1")) { return true; } return false; } } } }
2. 調用REST服務端方法,以Json作為數據格式
/// <summary> /// 取得升級服務端的url地址 /// </summary> /// <returns></returns> private String getServerUrl() { String result = ""; UpgraderClient upgraderClient = getUpgraderClient(); if (upgraderClient != null) { result += "http://" + upgraderClient.serverIP + ":" + upgraderClient.serverPort + "/upgraderServer/service/upgrade.do"; } return result; } /// <summary> /// 測試與升級服務端的連接 /// </summary> /// <returns></returns> public bool testConnect() { FileRequest fileReq = new FileRequest(); fileReq.type = (int)RequestType.TEST_CONNECT; string jsonData = JsonConvert.SerializeObject(fileReq); FileResponse rep = null; try { rep = HttpClientUtil.doPostMethodToObj<FileResponse>(getServerUrl(), jsonData); } catch { throw new Exception("連接遠程服務端失敗!"); } return rep.status == 200; }
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