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using System.Collections.Generic;
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using System.IO;
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using Newtonsoft.Json;
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using Newtonsoft.Json.Linq;
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using System.Data;
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using System.Reflection;
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using System;
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namespace Txgy.EWS.Client.Common.Helpers
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{
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/// <summary>
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/// Json帮助类
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/// 使用前需引用开源项目类库:Newtonsoft.Json.dll
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/// </summary>
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public class JsonHelper
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{
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/// <summary>
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/// 将对象序列化为json格式
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/// </summary>
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/// <param name="obj">序列化对象</param>
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/// <returns>json字符串</returns>
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public static string SerializeObjct(object obj)
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{
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return JsonConvert.SerializeObject(obj);
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}
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/// <summary>
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/// 解析JSON字符串生成对象实体
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/// </summary>
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/// <typeparam name="T">实体类</typeparam>
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/// <param name="json">JSON字符串</param>
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/// <returns></returns>
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public static T JsonConvertObject<T>(string json)
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{
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return JsonConvert.DeserializeObject<T>(json);
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}
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/// <summary>
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/// 解析JSON字符串生成对象实体
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/// </summary>
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/// <typeparam name="T">对象类型</typeparam>
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/// <param name="json">json字符串</param>
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/// <returns></returns>
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public static T DeserializeJsonToObject<T>(string json) where T : class
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{
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JsonSerializer serializer = new JsonSerializer();
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StringReader sr = new StringReader(json);
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object obj = serializer.Deserialize(new JsonTextReader(sr), typeof(T));
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T t = obj as T;
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return t;
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}
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/// <summary>
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/// 解析JSON数组生成对象实体集合
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/// </summary>
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/// <typeparam name="T">对象类型</typeparam>
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/// <param name="json">json数组</param>
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/// <returns>对象实体集合</returns>
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public static List<T> DeserializeJsonToList<T>(string json) where T : class
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{
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JsonSerializer serializer = new JsonSerializer();
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StringReader sr = new StringReader(json);
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object obj = serializer.Deserialize(new JsonTextReader(sr), typeof(List<T>));
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List<T> list = obj as List<T>;
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return list;
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}
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/// <summary>
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/// 将JSON转数组
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/// 用法:jsonArr[0]["xxxx"]
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/// </summary>
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/// <param name="json">json字符串</param>
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/// <returns></returns>
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public static JArray GetToJsonList(string json)
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{
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JArray jsonArr = (JArray)JsonConvert.DeserializeObject(json);
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return jsonArr;
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}
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/// <summary>
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/// 将DataTable转换成实体类
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/// </summary>
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/// <typeparam name="T">实体类</typeparam>
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/// <param name="dt">DataTable</param>
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/// <returns></returns>
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public static List<T> DtConvertToModel<T>(DataTable dt) where T : new()
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{
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List<T> ts = new List<T>();
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foreach (DataRow dr in dt.Rows)
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{
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T t = new T();
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foreach (PropertyInfo pi in t.GetType().GetProperties())
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{
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if (dt.Columns.Contains(pi.Name))
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{
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if (!pi.CanWrite) continue;
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var value = dr[pi.Name];
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if (value != DBNull.Value)
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{
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switch (pi.PropertyType.FullName)
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{
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case "System.Decimal":
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pi.SetValue(t, decimal.Parse(value.ToString()), null);
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break;
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case "System.String":
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pi.SetValue(t, value.ToString(), null);
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break;
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case "System.Int32":
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pi.SetValue(t, int.Parse(value.ToString()), null);
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break;
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default:
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pi.SetValue(t, value, null);
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break;
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}
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}
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}
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}
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ts.Add(t);
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}
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return ts;
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}
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}
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}
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