C#通用JSON帮助类-白红宇

C#通用JSON帮助类
阅读量：5171 次
发布时间：2019-06-13
本文共 10985 字，大约阅读时间需要 36 分钟。
using System;using System.Data;using System.Text;using System.Collections.Generic;using System.Reflection;using System.Data.Common;using System.Collections;using System.IO;using System.Text.RegularExpressions;using System.Runtime.Serialization.Json;namespace ZZUdp.Tool{    public static class JsonHepler    {        ///         /// List转成json         /// 
        /// 
             ///         ///         /// 
             public static string ListToJson
     
      (IList
      
        list, string jsonName)        {            StringBuilder Json = new StringBuilder();            if (string.IsNullOrEmpty(jsonName))                jsonName = list[0].GetType().Name;            Json.Append("{\"" + jsonName + "\":[");            if (list.Count > 0)            {                for (int i = 0; i < list.Count; i++)                {                    T obj = Activator.CreateInstance
       
        ();                    PropertyInfo[] pi = obj.GetType().GetProperties();                    Json.Append("{
    ");                    for (int j = 0; j < pi.Length; j++)                    {                        Type type;                        object o = pi[j].GetValue(list[i], null);                        string v = string.Empty;                        if (o != null)                        {                            type = o.GetType();                            v = o.ToString();                        }                        else                        {                            type = typeof(string);                        }                        Json.Append("\"" + pi[j].Name.ToString() + "\":" + StringFormat(v, type));                        if (j < pi.Length - 1)                        {                            Json.Append(",");                        }                    }                    Json.Append("}");                    if (i < list.Count - 1)                    {                        Json.Append(",");                    }                }            }            Json.Append("]}");            return Json.ToString();        }        /// 
                /// 序列化集合对象        /// 
        public static string JsonSerializerByArrayData
        
         (T[] tArray)        {            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T[]));            MemoryStream ms = new MemoryStream();            ser.WriteObject(ms, tArray);            string jsonString = Encoding.UTF8.GetString(ms.ToArray());            ms.Close();            string p = @"\\/Date\((\d+)\+\d+\)\\/";            MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDateToDateString);            Regex reg = new Regex(p);            jsonString = reg.Replace(jsonString, matchEvaluator);            return jsonString;        }        /// 
                 /// 序列化单个对象        /// 
        public static string JsonSerializerBySingleData
         
          (T t)        {            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));            MemoryStream ms = new MemoryStream();            ser.WriteObject(ms, t);            string jsonString = Encoding.UTF8.GetString(ms.ToArray());            ms.Close();            string p = @"\\/Date\((\d+)\+\d+\)\\/";            MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDateToDateString);            Regex reg = new Regex(p);            jsonString = reg.Replace(jsonString, matchEvaluator);            return jsonString;        }        /// 
           /// 反序列化单个对象 /// 
         public static T JsonDeserializeBySingleData
          
           (string jsonString) { //将"yyyy-MM-dd HH:mm:ss"格式的字符串转为"\/Date(1294499956278+0800)\/"格式 string p = @"\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}"; MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertDateStringToJsonDate); Regex reg = new Regex(p); jsonString = reg.Replace(jsonString, matchEvaluator); DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T)); MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString)); T obj = (T)ser.ReadObject(ms); return obj; } /// 
            /// 反序列化集合对象 /// 
 public static T[] JsonDeserializeByArrayData
           
            (string jsonString) { //将"yyyy-MM-dd HH:mm:ss"格式的字符串转为"\/Date(1294499956278+0800)\/"格式 string p = @"\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}"; MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertDateStringToJsonDate); Regex reg = new Regex(p); jsonString = reg.Replace(jsonString, matchEvaluator); DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T[])); MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString)); T[] arrayObj = (T[])ser.ReadObject(ms); return arrayObj; } /// 
             /// 将Json序列化的时间由/Date(1294499956278+0800)转为字符串 /// 
 private static string ConvertJsonDateToDateString(Match m) { string result = string.Empty; DateTime dt = new DateTime(1970, 1, 1); dt = dt.AddMilliseconds(long.Parse(m.Groups[1].Value)); dt = dt.ToLocalTime(); result = dt.ToString("yyyy-MM-dd HH:mm:ss"); return result; } /// 
             /// 将时间字符串转为Json时间 /// 
 private static string ConvertDateStringToJsonDate(Match m) { string result = string.Empty; DateTime dt = DateTime.Parse(m.Groups[0].Value); dt = dt.ToUniversalTime(); TimeSpan ts = dt - DateTime.Parse("1970-01-01"); result = string.Format("\\/Date({0}+0800)\\/", ts.TotalMilliseconds); return result; } /// 
             /// List转成json /// 
 /// 
             /// 
             /// 
             public static string ListToJson
            
             (IList
             
               list) { object obj = list[0]; return ListToJson
              
               (list, obj.GetType().Name); } /// 
                /// 对象转换为Json字符串 /// 
 /// 
               对象 /// 
               
                Json字符串
                public static string ToJson(object jsonObject) { try { StringBuilder jsonString = new StringBuilder(); jsonString.Append("{ "); PropertyInfo[] propertyInfo = jsonObject.GetType().GetProperties(); for (int i = 0; i < propertyInfo.Length; i++) { object objectValue = propertyInfo[i].GetGetMethod().Invoke(jsonObject, null); if (objectValue == null) { continue; } StringBuilder value = new StringBuilder(); if (objectValue is DateTime || objectValue is Guid || objectValue is TimeSpan) { value.Append("\"" + objectValue.ToString() + "\""); } else if (objectValue is string) { value.Append("\"" + objectValue.ToString() + "\""); } else if (objectValue is IEnumerable) { value.Append(ToJson((IEnumerable)objectValue)); } else { value.Append("\"" + objectValue.ToString() + "\""); } jsonString.Append("\"" + propertyInfo[i].Name + "\":" + value + ","); ; } return jsonString.ToString().TrimEnd(',') + "}"; } catch (Exception ex) { throw ex; } } /// 
                /// 对象集合转换Json /// 
 /// 
               集合对象 /// 
               
                Json字符串
                public static string ToJson(IEnumerable array) { string jsonString = "["; foreach (object item in array) { jsonString += ToJson(item) + ","; } if (jsonString.Length > 1) { jsonString.Remove(jsonString.Length - 1, jsonString.Length); } else { jsonString = "[]"; } return jsonString + "]"; } /// 
                /// 普通集合转换Json /// 
 /// 
               集合对象 /// 
               
                Json字符串
                public static string ToArrayString(IEnumerable array) { string jsonString = "["; foreach (object item in array) { jsonString = ToJson(item.ToString()) + ","; } jsonString.Remove(jsonString.Length - 1, jsonString.Length); return jsonString + "]"; } /// 
                /// Datatable转换为Json /// 
 /// 
               Datatable对象 /// 
               
                Json字符串
                public static string ToJson(DataTable dt) { StringBuilder jsonString = new StringBuilder(); jsonString.Append("["); DataRowCollection drc = dt.Rows; for (int i = 0; i < drc.Count; i++) { jsonString.Append("{ "); for (int j = 0; j < dt.Columns.Count; j++) { string strKey = dt.Columns[j].ColumnName; string strValue = drc[i][j].ToString(); Type type = dt.Columns[j].DataType; jsonString.Append("\"" + strKey + "\":"); strValue = StringFormat(strValue, type); if (j < dt.Columns.Count - 1) { jsonString.Append(strValue + ","); } else { jsonString.Append(strValue); } } jsonString.Append("},"); } jsonString.Remove(jsonString.Length - 1, 1); jsonString.Append("]"); if (jsonString.Length == 1) { return "[]"; } return jsonString.ToString(); } /// 
                /// DataTable转成Json /// 
 /// 
                /// 
                /// 
                public static string ToJson(DataTable dt, string jsonName) { StringBuilder Json = new StringBuilder(); if (string.IsNullOrEmpty(jsonName)) jsonName = dt.TableName; Json.Append("{\"" + jsonName + "\":["); if (dt.Rows.Count > 0) { for (int i = 0; i < dt.Rows.Count; i++) { Json.Append("{ "); for (int j = 0; j < dt.Columns.Count; j++) { Type type = dt.Rows[i][j].GetType(); Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + StringFormat(dt.Rows[i][j] is DBNull ? string.Empty : dt.Rows[i][j].ToString(), type)); if (j < dt.Columns.Count - 1) { Json.Append(","); } } Json.Append("}"); if (i < dt.Rows.Count - 1) { Json.Append(","); } } } Json.Append("]}"); return Json.ToString(); } /// 
                /// DataReader转换为Json /// 
 /// 
               DataReader对象 /// 
               
                Json字符串
                public static string ToJson(IDataReader dataReader) { try { StringBuilder jsonString = new StringBuilder(); jsonString.Append("["); while (dataReader.Read()) { jsonString.Append("{ "); for (int i = 0; i < dataReader.FieldCount; i++) { Type type = dataReader.GetFieldType(i); string strKey = dataReader.GetName(i); string strValue = dataReader[i].ToString(); jsonString.Append("\"" + strKey + "\":"); strValue = StringFormat(strValue, type); if (i < dataReader.FieldCount - 1) { jsonString.Append(strValue + ","); } else { jsonString.Append(strValue); } } jsonString.Append("},"); } if (!dataReader.IsClosed) { dataReader.Close(); } jsonString.Remove(jsonString.Length - 1, 1); jsonString.Append("]"); if (jsonString.Length == 1) { return "[]"; } return jsonString.ToString(); } catch (Exception ex) { throw ex; } } /// 
                /// DataSet转换为Json /// 
 /// 
               DataSet对象 /// 
               
                Json字符串
                public static string ToJson(DataSet dataSet) { string jsonString = "{ "; foreach (DataTable table in dataSet.Tables) { jsonString += "\"" + table.TableName + "\":" + ToJson(table) + ","; } jsonString = jsonString.TrimEnd(','); return jsonString + "}"; } /// 
                /// 过滤特殊字符 /// 
 /// 
                /// 
                public static string String2Json(String s) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < s.Length; i++) { char c = s.ToCharArray()[i]; switch (c) { case '\"': sb.Append("\\\""); break; case '\\': sb.Append("\\\\"); break; case '/': sb.Append("\\/"); break; case '\b': sb.Append("\\b"); break; case '\f': sb.Append("\\f"); break; case '\n': sb.Append("\\n"); break; case '\r': sb.Append("\\r"); break; case '\t': sb.Append("\\t"); break; case '\v': sb.Append("\\v"); break; case '\0': sb.Append("\\0"); break; default: sb.Append(c); break; } } return sb.ToString(); } /// 
                /// 格式化字符型、日期型、布尔型 /// 
 /// 
                /// 
                /// 
                private static string StringFormat(string str, Type type) { if (type != typeof(string) && string.IsNullOrEmpty(str)) { str = "\"" + str + "\""; } else if (type == typeof(string)) { str = String2Json(str); str = "\"" + str + "\""; } else if (type == typeof(DateTime)) { str = "\"" + str + "\""; } else if (type == typeof(bool)) { str = str.ToLower(); } else if (type == typeof(byte[])) { str = "\"" + str + "\""; } else if (type == typeof(Guid)) { str = "\"" + str + "\""; } return str; } }}