C# Winform反序列化複雜json字串
阿新 • • 發佈：2019-02-08
協議:https 請求方式:post
https://xx.xxx.net/app/clients
提交json 資料包
{ "action":" food_t_list", "data":{ “pageIndex”:”1”, “pageSize”:”20”, “foodGId”:”1”, “storeId”:”1” } }
返回說明
正確時返回JSON資料包：
{ "result": "1", "data": { "totalCount": "20", "pageCount": "3", “storeId”:”1”, "foodTables": [ {"foodTId": "2", "foodTName": "8號臺", “foodTPeo”:”6”, “foodGrade”: {“foodGId”:”1”,”foodGName”:”大廳”}, “foodTStatus”:”1”, "foodTDesc ": "餐桌的描述", “storeId”:”1” }, { "foodTId": "5", "foodTName": "5號臺", “foodTPeo”:”8”, “foodGrade”: {“foodGId”:”2”,”foodGName”:”包間”}, “foodTStatus”:”0”, "foodTDesc ": "餐桌的描述" } ] } }
錯誤時返回JSON資料包：
{“result”:”0”,"errcode":10036”,”errmsg":"錯誤資訊!"} //錯誤程式碼，根據程式碼規則查詢錯誤資訊。
根據這個返回的json字串，我們來構建相應的類FoodList，為後面將json反序列化為FoodList做準備
public abstract class BaseEntity
{
public int result { get; set; }
public int errcode { get; set; }
public string errmsg { get; set; }
}
///<summary> /// 餐桌列表 /// </summary> public class FoodList : BaseEntity { public FoodEntity data { get; set; } } public class FoodEntity { /// <summary> /// 總頁數 /// </summary> public int totalCount { get; set; } /// <summary> /// 當前頁數 /// </summary> public int pageCount { get; set; } /// <summary> /// 餐桌等級列表集合 /// </summary> public List<FoodTable> foodTables { get; set; } } public class FoodTable { /// <summary> /// 餐桌 ID /// </summary> public int foodTId { get; set; } /// <summary> /// 餐桌名稱 /// </summary> public string foodTName { get; set; } /// <summary> /// 餐桌使用人數 /// </summary> public int foodTPeo { get; set; } /// <summary> /// 餐桌等級 /// </summary> public FoodGradeInfo foodGrade { get; set; } /// <summary> /// 餐桌狀態 0 空閒 1 預定 2 使用中 /// </summary> public int? foodTStatus { get; set; } /// <summary> /// 餐桌的描述 /// </summary> public string foodTDesc { get; set; } /// <summary> /// 商鋪 ID /// </summary> public int storeId { get; set; } }
那麼，我需要做的，就是呼叫API介面，拿到json字串，然後反序列化為物件。
C#中序列化和反序列化有多中方式，這裡我採用JavaScriptSerializer，在Winform程式中使用JavaScriptSerializer需要先新增如下兩個引用：
新建HttpClientUtil類，封裝API請求的類，
// @POST 方法 public static string PostMethodToString(string metodUrl, string jsonBody) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(metodUrl); 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 json; //return ((JObject)JsonConvert.DeserializeObject(json)).ToString(); }
然後新建一個範序列化的類JsonHelper
using System.Web.Script.Serialization;
/// <summary> /// 把json字串轉成物件 /// </summary> /// <typeparam name="T">物件</typeparam> /// <param name="data">json字串</param> public static T Deserialize<T>(string data) { JavaScriptSerializer json = new JavaScriptSerializer(); return json.Deserialize<T>(data); }
最後，我們來看呼叫方法：這裡採用了兩種呼叫方式，第一種是直接拼接json字串，第二種是通過構造強型別類，然後序列化為json字串
/// <summary> /// 根據餐桌等級ID獲取餐桌列表 /// </summary> /// <param name="pageIndex"></param> /// <param name="graId"></param> /// <returns></returns> private List<FoodTable> LoadAllData(int pageIndex, int graId) { //string jsonBody = "{ 'action': 'food_t_list', 'access_token':'" + CommonProperty.ACCESS_TOKEN + // "', 'data': { 'pageIndex': '" + pageIndex + "', 'pageSize': '" + CommonProperty.PageSize + "', 'storeId': "
+ CommonProperty.StoreId + ",foodGId:'" + graId + "'} }"; //string json = HttpClientUtil.PostMethodToString(CommonProperty.HttpUrl, jsonBody); //List<FoodTable> table = JsonHelper.Deserialize<FoodList>(json).data.foodTables; FoodTListMode mode = new FoodTListMode(); mode.pageIndex = 1; mode.pageSize = CommonProperty.PageSize; mode.foodGId = graId; mode.storeId = CommonProperty.StoreId; DataHelper<FoodList> data = new DataHelper<FoodList>(); List<FoodTable> table = data.LoadData(CommonProperty.FoodTList, mode).data.foodTables; listAll.AddRange(table); FoodList f = new FoodList(); if (table.Count > CommonProperty.PageSize) { LoadAllData(pageIndex + 1, graId); } return listAll; }
根據大家的建議，重新試用了下json.net，這次成功了，之前呼叫的方法有問題
方法一、
// REST @POST 方法 public static T DoPostMethodToObj<T>(string metodUrl, string jsonBody) { request = (HttpWebRequest)WebRequest.Create(metodUrl); request.Method = "post"; request.ContentType = "application/json;charset=UTF-8"; //request.Connection="keep-alive"; 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 JsonHelper.Deserialize<T>(json); return JsonConvert.DeserializeObject<T>(json); }
方法二、新建JsonUtility類
View
Code
呼叫方式：
public static T PostMethodToObj<T>(string metodUrl, string jsonBody) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(metodUrl); request.Method = "post"; request.ContentType = "application/json;charset=UTF-8"; //request.Connection="keep-alive"; 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 Utility.JsonUtility.DecodeObject<T>(json); }