JSON格式互转集合

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using System.Data;
using System.Data.Common;
using System.Collections;
using System.Reflection;

namespace BJYX.WEB.Public
{
    public class Creat_Json
    {
        public Creat_Json()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }

        public static string DataTable2Json(System.Data.DataTable dt)
        {
            System.Text.StringBuilder jsonBuilder = new System.Text.StringBuilder();
            jsonBuilder.Append("{");
            jsonBuilder.AppendFormat("\"total\":{0}, ", dt.Rows.Count);
            jsonBuilder.Append("\"rows\":[ ");
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                jsonBuilder.Append("{");
                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    jsonBuilder.Append("\"");
                    jsonBuilder.Append(dt.Columns[j].ColumnName);
                    jsonBuilder.Append("\":\"");
                    jsonBuilder.Append(dt.Rows[i][j].ToString().Replace("\\", "\\\\").Replace("'", "'").Replace("\t", " ").Replace("\r", " ").Replace("\n", "<br/>").Replace("\"", """));
                    jsonBuilder.Append("\",");
                }
                jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
                jsonBuilder.Append("},");
            }
            jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
            jsonBuilder.Append("]");
            jsonBuilder.Append("}");
            return jsonBuilder.ToString();
        }
        public static string DataTable2Json(System.Data.DataTable dt, int count)
        {
            System.Text.StringBuilder jsonBuilder = new System.Text.StringBuilder();
            jsonBuilder.Append("{");
            jsonBuilder.AppendFormat("\"total\":{0}, ", count);
            jsonBuilder.Append("\"rows\":[ ");
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                jsonBuilder.Append("{");
                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    jsonBuilder.Append("\"");
                    jsonBuilder.Append(dt.Columns[j].ColumnName);
                    jsonBuilder.Append("\":\"");
                    jsonBuilder.Append(dt.Rows[i][j].ToString().Replace("\\", "\\\\").Replace("'", "'").Replace("\t", " ").Replace("\r", " ").Replace("\n", "<br/>").Replace("\"", """));
                    jsonBuilder.Append("\",");
                }
                jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
                jsonBuilder.Append("},");
            }
            jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
            jsonBuilder.Append("]");
            jsonBuilder.Append("}");
            return jsonBuilder.ToString();
        }
        public static string DataTableToJson(System.Data.DataTable dt)
        {
            StringBuilder Json = new StringBuilder();
            Json.Append("[");
            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++)
                    {
                        Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":\"" + dt.Rows[i][j].ToString().Replace("\\", "\\\\").Replace("'", "'").Replace("\t", " ").Replace("\r", " ").Replace("\n", "<br/>").Replace("\"", """) + "\"");
                        if (j < dt.Columns.Count - 1)
                        {
                            Json.Append(",");
                        }
                    }
                    Json.Append("}");
                    if (i < dt.Rows.Count - 1)
                    {
                        Json.Append(",");
                    }
                }
            }
            Json.Append("]");
            return Json.ToString().Replace("\\", "\\\\").Replace("\'", "\\\'").Replace("\t", " ").Replace("\r", " ").Replace("\n", "<br/>");//.Replace("\"", "'"); ;
        }

        /// <summary>
        /// Table to JSON By FlexGrid
        /// </summary>
        /// <param name="ds"></param>
        /// <param name="page"></param>
        /// <returns></returns>
        public static string DataTableToJson(System.Data.DataTable dt, int page, int total)
        {
            StringBuilder jsonStr = new StringBuilder();
            jsonStr.Append("{");
            jsonStr.Append("\"page\":" + page + ",");
            jsonStr.Append("\"total\":" + total + ",");
            jsonStr.Append("\"rows\":");
            jsonStr.Append("[");

            foreach (System.Data.DataRow dr in dt.Rows)
            {
                jsonStr.Append("{");

                foreach (System.Data.DataColumn dc in dt.Columns)
                {
                    jsonStr.Append("\"");
                    jsonStr.Append(dc.ColumnName);
                    jsonStr.Append("\"");
                    jsonStr.Append(":");

                    jsonStr.Append("\"");
                    jsonStr.Append(dr[dc].ToString().Trim());
                    jsonStr.Append("\" ,");
                }

                jsonStr.Remove(jsonStr.Length - 1, 1);
                jsonStr.Append("}");
                jsonStr.Append(",");
            }
            if (dt.Rows.Count > 0)
            {
                jsonStr.Remove(jsonStr.Length - 1, 1);
            }
            jsonStr.Append("]");
            jsonStr.Append("}");

            return jsonStr.ToString();
        }

        /// <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 = pi[j].GetValue(list[i], null).GetType();
                        Json.Append("\"" + pi[j].Name.ToString() + "\":" + StringFormat(pi[j].GetValue(list[i], null).ToString(), type));

                        if (j < pi.Length - 1)
                        {
                            Json.Append(",");
                        }
                    }
                    Json.Append("}");
                    if (i < list.Count - 1)
                    {
                        Json.Append(",");
                    }
                }
            }
            Json.Append("]}");
            return Json.ToString();
        }

        /// <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)
        {
            string jsonString = "{";
            PropertyInfo[] propertyInfo = jsonObject.GetType().GetProperties();
            for (int i = 0; i < propertyInfo.Length; i++)
            {
                object objectValue = propertyInfo[i].GetGetMethod().Invoke(jsonObject, null);
                string value = string.Empty;
                if (objectValue is DateTime || objectValue is Guid || objectValue is TimeSpan)
                {
                    value = "'" + objectValue.ToString() + "'";
                }
                else if (objectValue is string)
                {
                    value = "'" + ToJson(objectValue.ToString()) + "'";
                }
                else if (objectValue is IEnumerable)
                {
                    value = ToJson((IEnumerable)objectValue);
                }
                else
                {
                    value = ToJson(objectValue.ToString());
                }
                jsonString += "\"" + ToJson(propertyInfo[i].Name) + "\":" + value + ",";
            }
            jsonString.Remove(jsonString.Length - 1, jsonString.Length);
            return jsonString + "}";
        }

        /// <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) + ",";
            }
            jsonString.Remove(jsonString.Length - 1, jsonString.Length);
            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("]");
            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].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(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[i].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();
        }
        /// <summary>
        /// 将IList转成JSON
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="jsonName"></param>
        /// <param name="IL"></param>
        /// <returns></returns>
        public static string ObjectToJson<T>(IList<T> IL)
        {
            StringBuilder Json = new StringBuilder();
            Json.Append("[");
            if (IL.Count > 0)
            {
                for (int i = 0; i < IL.Count; i++)
                {
                    T obj = Activator.CreateInstance<T>();
                    Type type = obj.GetType();
                    PropertyInfo[] pis = type.GetProperties();
                    Json.Append("{");
                    for (int j = 0; j < pis.Length; j++)
                    {
                        Json.Append("\"" + pis[j].Name.ToString() + "\":\"" + pis[j].GetValue(IL[i], null) + "\"");
                        if (j < pis.Length - 1)
                        {
                            Json.Append(",");
                        }
                    }
                    Json.Append("}");
                    if (i < IL.Count - 1)
                    {
                        Json.Append(",");
                    }
                }
            }
            Json.Append("]");
            return Json.ToString();
        }

        /// <summary>
        /// 将IList转成符合FlexiGrid控件格式的JSON
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="IL"></param>
        /// <param name="page">但前页</param>
        /// <param name="total">数据行数</param>
        /// <returns></returns>
        public static string ListToFlexiGridJson<T>(IList<T> IL, int page, int total)
        {
            StringBuilder Json = new StringBuilder();
            Json.Append("{");
            Json.Append("\"page\":" + page + ",");
            Json.Append("\"total\":" + total + ",");
            Json.Append("\"rows\":");
            Json.Append("[");

            if (IL.Count > 0)
            {
                for (int i = 0; i < IL.Count; i++)
                {
                    T obj = Activator.CreateInstance<T>();
                    Type type = obj.GetType();
                    PropertyInfo[] pis = type.GetProperties();
                    Json.Append("{");
                    for (int j = 0; j < pis.Length; j++)
                    {
                        Json.Append("\"" + pis[j].Name.ToString() + "\":\"" + pis[j].GetValue(IL[i], null) + "\"");
                        if (j < pis.Length - 1)
                        {
                            Json.Append(",");
                        }
                    }
                    Json.Append("}");
                    if (i < IL.Count - 1)
                    {
                        Json.Append(",");
                    }
                }
            }
            Json.Append("]");
            Json.Append("}");
            return Json.ToString();
        }

        /// <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>   
        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>   
        /// 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))
            {
                str = String2Json(str);
                str = "\"" + str + "\"";
            }
            else if (type == typeof(DateTime))
            {
                str = "\"" + str + "\"";
            }
            else if (type == typeof(bool))
            {
                str = str.ToLower();
            }
            return str;
        }


    }
}