[Json] C#ConvertJson|List转成Json|对象|集合|DataSet|DataTable|DataReader转成Json （转载）...

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/// <summary>
/// 类说明：Assistant
/// 编 码 人：苏飞
/// 联系方式：361983679  
/// 更新网站：[url=http://www.sufeinet.com/thread-655-1-1.html]http://www.sufeinet.com/thread-655-1-1.html[/url]
/// </summary>
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Reflection;
using System.Collections;
using System.Data.Common;namespace SiteAppFunction
{//JSON转换类public class ConvertJson{#region 私有方法/// <summary>/// 过滤特殊字符/// </summary>private static string String2Json(String s){StringBuilder sb = new StringBuilder();for (int i = 0; i < s.Length; i++){char c = s.ToCharArray();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>/// 格式化字符型、日期型、布尔型/// </summary>private static string StringFormat(string str, Type type){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(string) && string.IsNullOrEmpty(str)){str = "\"" + str + "\"";}return str;}#endregion#region 字符串转Jsion#endregion#region List转换成Json/// <summary>/// List转换成Json/// </summary>public static string ListToJson<T>(IList<T> list){object obj = list[0];return ListToJson<T>(list, obj.GetType().Name);}/// <summary>/// List转换成Json /// </summary>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 = pi[j].GetValue(list, null).GetType();Json.Append("\"" + pi[j].Name.ToString() + "\":" + StringFormat(pi[j].GetValue(list, null).ToString(), type));if (j < pi.Length - 1){Json.Append(",");}}Json.Append("}");if (i < list.Count - 1){Json.Append(",");}}}Json.Append("]}");return Json.ToString();}#endregion#region 对象转换为Json/// <summary> /// 对象转换为Json /// </summary> /// <param name="jsonObject">自定义对象</param> /// <returns>Json字符串</returns> public static string ToJson(object jsonObject){string jsonString = "{";PropertyInfo[] propertyInfo = jsonObject.GetType().GetProperties();for (int i = 0; i < propertyInfo.Length; i++){object objectValue = propertyInfo.GetGetMethod().Invoke(jsonObject, null);string value = string.Empty;if (objectValue is DateTime || objectValue is Guid || objectValue is TimeSpan || objectValue is string){value = "'" + objectValue.ToString() + "'";}else{value = objectValue.ToString();}jsonString += "\"" + propertyInfo.Name + "\":" + value + ",";}jsonString = jsonString.Remove(jsonString.LastIndexOf(","));return jsonString + "}";}#endregion#region  DataSet转换为Json/// <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 + "}";}#endregion#region Datatable转换为Json/// <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[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>/// DataTable转换为Json /// </summary>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[j].GetType();Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + StringFormat(dt.Rows[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();}#endregion#region DataReader转换为Json/// <summary> /// DataReader转换为Json /// </summary> /// <param name="dataReader">DataReader对象</param> /// <returns>Json字符串</returns> public static string ToJson(DbDataReader dataReader){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.ToString();jsonString.Append("\"" + strKey + "\":");strValue = StringFormat(strValue, type);if (i < dataReader.FieldCount - 1){jsonString.Append(strValue + ",");}else{jsonString.Append(strValue);}}jsonString.Append("},");}dataReader.Close();jsonString.Remove(jsonString.Length - 1, 1);jsonString.Append("]");return jsonString.ToString();}#endregion}
}