.net實體類與json相互轉換時，注意要點：
1.jsonhelp編寫時候添加的引用。System.Runtime.Serialization.Json;
2.實體類需聲明為public
jsonhelp代碼：
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using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Runtime.Serialization.Json;using System.IO;namespace JsonTest{ class JsonHelp { public JsonHelp() { // // TODO: Add constructor logic here // } /// <summary> /// 把對象序列化 JSON 字符串 /// </summary> /// <typeparam name="T">對象類型</typeparam> /// <param name="obj">對象實體</param> /// <returns>JSON字符串</returns> public static string GetJson<T>(T obj) { //記住 添加引用 System.ServiceModel.Web /** * 如果不添加上面的引用,System.Runtime.Serialization.Json; Json是出不來的哦 * */ DataContractJsonSerializer json = new DataContractJsonSerializer(typeof(T)); using (MemoryStream ms = new MemoryStream()) { json.WriteObject(ms, obj); string szJson = Encoding.UTF8.GetString(ms.ToArray()); return szJson; } } /// <summary> /// 把JSON字符串還原為對象 /// </summary> /// <typeparam name="T">對象類型</typeparam> /// <param name="szJson">JSON字符串</param> /// <returns>對象實體</returns> public static T ParseFormJson<T>(string szJson) { T obj = Activator.CreateInstance<T>(); using (MemoryStream ms = new MemoryStream (Encoding.UTF8.GetBytes(szJson))) { DataContractJsonSerializer dcj = new DataContractJsonSerializer(typeof(T)); return (T)dcj.ReadObject(ms); } } }} |
實體類代碼：
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using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace JsonTest{ public class testData { public testData() { } public int Id { get; set; } public string Name { get; set; } public string Sex { get; set; } }} |
控制臺應用程序測試代碼：
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using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace JsonTest{ class Program { static void Main(string[] args) { //實體類轉json testData t1 = new testData(); t1.Id = 1; t1.Name = "001姓名"; t1.Sex = "男"; testData t2 = new testData(); t2.Id = 2; t2.Name = "002姓名"; t2.Sex = "男"; testData t3 = new testData(); t3.Id = 3; t3.Name = "003姓名"; t3.Sex = "男"; List<testData> tlist = new List<testData>(); tlist.Add(t1); tlist.Add(t2); tlist.Add(t3); Console.WriteLine(JsonHelp.GetJson<List<testData>>(tlist)); // Console.ReadKey(); //json轉實體類 List<testData> tl = JsonHelp.ParseFormJson <List<testData>>(JsonHelp.GetJson<List<testData>>(tlist)); Console.WriteLine(tl.Count); Console.WriteLine(tl[0].Name); Console.ReadKey(); } }} |
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