C#操作json的通用帮助类
发布时间:2020-12-15 17:58:58 所属栏目:百科 来源:网络整理
导读:今天PHP站长网 52php.cn把收集自互联网的代码分享给大家,仅供参考。 using System;using System.Data;using System.Text;using System.Collections.Generic;using System.Reflection;using System.Data.Common;using Sys
以下代码由PHP站长网 52php.cn收集自互联网 现在PHP站长网小编把它分享给大家,仅供参考 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 { /// <summary> /// List转成json /// </summary> /// <typeparam name="T"></typeparam> /// <param name="jsonName"></param> /// <param name="list"></param> /// <returns></returns> public static string ListToJson<T>(IList<T> 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<T>(); 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(); } /// <summary> /// 序列化集合对象 /// </summary> public static string JsonSerializerByArrayData<T>(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; } /// <summary> /// 序列化单个对象 /// </summary> public static string JsonSerializerBySingleData<T>(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; } /// <summary> /// 反序列化单个对象 /// </summary> public static T JsonDeserializeBySingleData<T>(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}sd{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; } /// <summary> /// 反序列化集合对象 /// </summary> public static T[] JsonDeserializeByArrayData<T>(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}sd{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; } /// <summary> /// 将Json序列化的时间由/Date(1294499956278+0800)转为字符串 /// </summary> 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; } /// <summary> /// 将时间字符串转为Json时间 /// </summary> 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; } /// <summary> /// List转成json /// </summary> /// <typeparam name="T"></typeparam> /// <param name="list"></param> /// <returns></returns> public static string ListToJson<T>(IList<T> list) { object obj = list[0]; return ListToJson<T>(list,obj.GetType().Name); } /// <summary> /// 对象转换为Json字符串 /// </summary> /// <param name="jsonObject">对象</param> /// <returns>Json字符串</returns> 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; } } /// <summary> /// 对象集合转换Json /// </summary> /// <param name="array">集合对象</param> /// <returns>Json字符串</returns> 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 + "]"; } /// <summary> /// 普通集合转换Json /// </summary> /// <param name="array">集合对象</param> /// <returns>Json字符串</returns> 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 + "]"; } /// <summary> /// Datatable转换为Json /// </summary> /// <param name="table">Datatable对象</param> /// <returns>Json字符串</returns> 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(); } /// <summary> /// DataTable转成Json /// </summary> /// <param name="jsonName"></param> /// <param name="dt"></param> /// <returns></returns> 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(); } /// <summary> /// DataReader转换为Json /// </summary> /// <param name="dataReader">DataReader对象</param> /// <returns>Json字符串</returns> 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; } } /// <summary> /// DataSet转换为Json /// </summary> /// <param name="dataSet">DataSet对象</param> /// <returns>Json字符串</returns> public static string ToJson(DataSet dataSet) { string jsonString = "{"; foreach (DataTable table in dataSet.Tables) { jsonString += """ + table.TableName + "":" + ToJson(table) + ","; } jsonString = jsonString.TrimEnd(','); return jsonString + "}"; } /// <summary> /// 过滤特殊字符 /// </summary> /// <param name="s"></param> /// <returns></returns> 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 ' ': sb.Append(" "); break; default: sb.Append(c); break; } } return sb.ToString(); } /// <summary> /// 格式化字符型、日期型、布尔型 /// </summary> /// <param name="str"></param> /// <param name="type"></param> /// <returns></returns> 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; } } } 以上内容由PHP站长网【52php.cn】收集整理供大家参考研究 如果以上内容对您有帮助,欢迎收藏、点赞、推荐、分享。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |