分享一个C#通用的json操作类
来源：互联网 发布：游戏王卡组攻略软件 编辑：程序博客网 时间：2024/06/10 01:54
json操作类，支持json格式的字符串常用操作，对象序列化为json字符串、json字符串转换为对象，DataTable转换为json字符串。支持将实体类转换成DataTable 。
源码如下：
using System;using System.Data;using System.Configuration;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Xml.Linq;using System.Web.Script.Serialization;using System.Collections.Generic;using System.Text;using System.Collections;using System.Reflection;using System.IO;/// <summary>///JsonTableHelper 的摘要说明/// </summary>public static class JsonTableHelper{ /// <summary> /// 返回对象序列化 /// </summary> /// <param name="obj">源对象</param> /// <returns>json数据</returns> public static string ToJson(this object obj) { JavaScriptSerializer serialize = new JavaScriptSerializer(); return serialize.Serialize(obj); } /// <summary> /// 控制深度 /// </summary> /// <param name="obj">源对象</param> /// <param name="recursionDepth">深度</param> /// <returns>json数据</returns> public static string ToJson(this object obj, int recursionDepth) { JavaScriptSerializer serialize = new JavaScriptSerializer(); serialize.RecursionLimit = recursionDepth; return serialize.Serialize(obj); } /// <summary> /// DataTable转为json /// </summary> /// <param name="dt">DataTable</param> /// <returns>json数据</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("]"); return jsonString.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 (str== null || str == string.Empty) str = "\"\""; if (type == typeof(string)) { str = String2Json(str); str = "\"" + str + "\""; } else if (type == typeof(DateTime)) { str = "\"" + str + "\""; } else if (type == typeof(bool)) { str = str.ToLower(); } return str; } /// <summary> /// DataTable转为json,不带索引 /// </summary> /// <param name="dt">DataTable</param> /// <returns>json数据</returns> public static string ToJsonTotal(DataTable dt,int count) { StringBuilder sb = new StringBuilder(); sb.Append("{\"total\":"+count+",\"rows\":"); sb.Append(ToJsonp(dt)); sb.Append("}"); return sb.ToString(); } /// <summary> /// 过滤特殊字符 /// </summary> /// <param name="s"></param> /// <returns></returns> private 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; default: sb.Append(c); break; } } return sb.ToString(); } /// <summary> /// DataTable转为json /// </summary> /// <param name="dt">DataTable</param> /// <returns>json数据</returns> public static string ToJsonDrv(DataTable dt) { Dictionary<string, object> dic = new Dictionary<string, object>(); int index = 0; foreach (DataRowView drv in dt.DefaultView) { Dictionary<string, object> result = new Dictionary<string, object>(); foreach (DataColumn dc in dt.Columns) { result.Add(dc.ColumnName, drv[dc.ColumnName].ToString()); } dic.Add(index.ToString(), result); index++; } return ToJson(dic); } /// <summary> /// DataTable转为jsonp,autocomplete插件需要使用的jsonp格式 /// </summary> /// <param name="dtResult">DataTable</param> /// <returns>jsonp数据</returns> public static string ToJsonp(DataTable dtResult) { if (dtResult == null) { return ""; } StringBuilder jsonString = new StringBuilder(); string temp = ""; string value = ""; jsonString.Append("["); foreach (DataRow dr in dtResult.Rows) { temp = ""; jsonString.Append("{"); foreach (DataColumn dc in dtResult.Columns) { value = dr[dc].ToString(); //if (value.Length < 1) //{ // value = " "; //} temp += "\"" + dc.ColumnName + "\":\"" + value + "\","; } temp = temp.TrimEnd(','); jsonString.Append(temp + "},"); } temp = jsonString.ToString(); temp = temp.TrimEnd(','); temp += "]"; return temp; } /// <summary> /// 将实体类转换成DataTable /// </summary> /// <typeparam name="T"></typeparam> /// <param name="i_objlist"></param> /// <returns></returns> public static DataTable ToDataTable<T>(IList<T> objlist) { if (objlist == null || objlist.Count <= 0) { return null; } DataTable dt = new DataTable(typeof(T).Name); DataColumn column; DataRow row; System.Reflection.PropertyInfo[] myPropertyInfo = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance); foreach (T t in objlist) { if (t == null) { continue; } row = dt.NewRow(); for (int i = 0, j = myPropertyInfo.Length; i < j; i++) { System.Reflection.PropertyInfo pi = myPropertyInfo[i]; string name = pi.Name; if (dt.Columns[name] == null) { column = new DataColumn(name, pi.PropertyType); dt.Columns.Add(column); } row[name] = pi.GetValue(t, null); } dt.Rows.Add(row); } return dt; } public static string Obj2Base64String(object serializableObject) { string returnedData; if (serializableObject == null) returnedData = String.Empty; else { byte[] resultBytes = null; System.Runtime.Serialization.Formatters.Binary.BinaryFormatter formatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter(); MemoryStream stream = new MemoryStream(); formatter.Serialize(stream, serializableObject); resultBytes = stream.ToArray(); stream.Close(); returnedData = Convert.ToBase64String(resultBytes); } return returnedData; } ///<summary></summary> <summary><summary></summary> /// Deserializes base64 string to object.返序列化string 为 object /// </summary><summary></summary> public static object Base64String2Obj(string deserializedString) { object returnedData; if (deserializedString == String.Empty) returnedData = null; else { System.Runtime.Serialization.Formatters.Binary.BinaryFormatter formatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter(); MemoryStream stream = new MemoryStream(); byte[] middata = Convert.FromBase64String(deserializedString); stream.Write(middata, 0, middata.Length); //Pay attention to the following line. don't forget this line. stream.Seek(0, SeekOrigin.Begin); returnedData = formatter.Deserialize(stream); stream.Close(); } return returnedData; } /// <summary> /// Json 字符串 转换为 DataTable数据集合 /// </summary> /// <param name="json"></param> /// <returns></returns> public static DataTable ToDataTable(this string json) { DataTable dataTable = new DataTable(); //实例化 DataTable result; try { JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer(); javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值 ArrayList arrayList = javaScriptSerializer.Deserialize<ArrayList>(json); if (arrayList.Count > 0) { foreach (Dictionary<string, object> dictionary in arrayList) { if (dictionary.Keys.Count<string>() == 0) { result = dataTable; return result; } if (dataTable.Columns.Count == 0) { foreach (string current in dictionary.Keys) { dataTable.Columns.Add(current, dictionary[current].GetType()); } } DataRow dataRow = dataTable.NewRow(); foreach (string current in dictionary.Keys) { dataRow[current] = dictionary[current]; } dataTable.Rows.Add(dataRow); //循环添加行到DataTable中 } } } catch { } result = dataTable; return result; }}using System;using System.Collections.Generic;using System.Web;using System.Web.Script.Serialization;using System.Data;namespace cn.EginSoft.Core.Commons{ /// <summary> /// JSON帮助类 /// </summary> public class JsonHelper { /// <summary> /// 对象转JSON /// </summary> /// <param name="obj">对象</param> /// <returns>JSON格式的字符串</returns> public static string ObjectToJSON(object obj) { JavaScriptSerializer jss = new JavaScriptSerializer(); try { return jss.Serialize(obj); } catch (Exception ex) { throw new Exception("JSONHelper.ObjectToJSON(): " + ex.Message); } } /// <summary> /// 数据表转键值对集合 /// 把DataTable转成 List集合, 存每一行 /// 集合中放的是键值对字典,存每一列 /// </summary> /// <param name="dt">数据表</param> /// <returns>哈希表数组</returns> public static List<Dictionary<string, object>> DataTableToList(DataTable dt) { List<Dictionary<string, object>> list = new List<Dictionary<string, object>>(); foreach (DataRow dr in dt.Rows) { Dictionary<string, object> dic = new Dictionary<string, object>(); foreach (DataColumn dc in dt.Columns) { dic.Add(dc.ColumnName, dr[dc.ColumnName]); } list.Add(dic); } return list; } /// <summary> /// 数据集转键值对数组字典 /// </summary> /// <param name="dataSet">数据集</param> /// <returns>键值对数组字典</returns> public static Dictionary<string, List<Dictionary<string, object>>> DataSetToDic(DataSet ds) { Dictionary<string, List<Dictionary<string, object>>> result = new Dictionary<string, List<Dictionary<string, object>>>(); foreach (DataTable dt in ds.Tables) result.Add(dt.TableName, DataTableToList(dt)); return result; } /// <summary> /// 数据表转JSON /// </summary> /// <param name="dataTable">数据表</param> /// <returns>JSON字符串</returns> public static string DataTableToJSON(DataTable dt) { return ObjectToJSON(DataTableToList(dt)); } /// <summary> /// JSON文本转对象,泛型方法 /// </summary> /// <typeparam name="T">类型</typeparam> /// <param name="jsonText">JSON文本</param> /// <returns>指定类型的对象</returns> public static T JSONToObject<T>(string jsonText) { JavaScriptSerializer jss = new JavaScriptSerializer(); try { return jss.Deserialize<T>(jsonText); } catch (Exception ex) { throw new Exception("JSONHelper.JSONToObject(): " + ex.Message); } } /// <summary> /// 将JSON文本转换为数据表数据 /// </summary> /// <param name="jsonText">JSON文本</param> /// <returns>数据表字典</returns> public static Dictionary<string, List<Dictionary<string, object>>> TablesDataFromJSON(string jsonText) { return JSONToObject<Dictionary<string, List<Dictionary<string, object>>>>(jsonText); } /// <summary> /// 将JSON文本转换成数据行 /// </summary> /// <param name="jsonText">JSON文本</param> /// <returns>数据行的字典</returns> public static Dictionary<string, object> DataRowFromJSON(string jsonText) { return JSONToObject<Dictionary<string, object>>(jsonText); } }} 0 0
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