ConvertJson.cs(20170223)

using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Reflection;
using System.Text;
using System.Text.RegularExpressions;
using System.Web.Script.Serialization;

namespace WebQiXingCai.Common
{
    /// <summary>
    /// JSON转换类
    /// </summary>
    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()[i];
                switch (c)
                {
                    case '"':
                        sb.Append("\""); break;
                    case '\':
                        sb.Append("\\"); break;
                    case '/':
                        sb.Append("\/"); break;
                    case '':
                        sb.Append("\b"); break;
                    case 'f':
                        sb.Append("\f"); break;
                    case '
':
                        sb.Append("\n"); break;
                    case '
':
                        sb.Append("\r"); break;
                    case '	':
                        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 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++)
                    {
                        if (pi[j].GetValue(list[i], null) == null)
                        {
                            Json.Append(""" + pi[j].Name.ToString() + "":null");
                        }
                        else
                        {
                            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();
        }


        #endregion

        #region 对象转换为Json
        /// <summary> 
        /// 对象转换为Json 
        /// </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 + "}";
        }
        #endregion

        #region 对象集合转换Json
        /// <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 + "]";
        }
        #endregion

        #region 普通集合转换Json
        /// <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 + "]";
        }
        #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)
        {
            if (dataSet.Tables[0].Rows.Count > 0)
            {
                string jsonString = "{";
                foreach (DataTable table in dataSet.Tables)
                {
                    jsonString += """ + table.TableName + "":" + ToJson(table) + ",";
                }
                jsonString = jsonString.TrimEnd(',');
                return jsonString + "}";
            }
            else
            {
                return "[]";
            }
        }


        /// <summary> 
        /// DataSet转换为标准Json 
        /// </summary> 
        /// <param name="dataSet">DataSet对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToStandardJson(DataSet dataSet)
        {

            if (dataSet.Tables[0].Rows.Count > 0)
            {
                string jsonString = "";
                foreach (DataTable table in dataSet.Tables)
                {
                    jsonString += ToJson(table) + ",";
                }
                jsonString = jsonString.TrimEnd(',');
                return jsonString;
            }
            else
            {
                return "[]";
            }

        }
        #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)
        {
            if (dt.Rows.Count == 0)
            {
                return "[]";
            }
            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[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();
        }
        #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[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();
        }
        #endregion

        #region 数据表转字典

        /// <summary>
        /// 表转Dictionary字典
        /// </summary>
        public static Dictionary<string, object> ToDic(DataTable dt)
        {
            Dictionary<string, object> dic = new Dictionary<string, object>();
            DataRowCollection drc = dt.Rows;
            for (int i = 0; i < drc.Count; i++)
            {

                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    string strKey = dt.Columns[j].ColumnName + "[" + i + "]";
                    string strValue = drc[i][j].ToString();
                    dic.Add(strKey, strValue);
                }

            }

            return dic;

        }



        #endregion

        #region Dictionary字典与json互转


        /// <summary>
        /// Dictionary字典转json
        /// </summary>
        /// <param name="dic"></param>
        /// <returns></returns>
        public static string ToJson(Dictionary<string, object> dic)
        {
            JavaScriptSerializer jss = new JavaScriptSerializer();
            string json = (jss).Serialize(dic);
            return json;
        }

        /// <summary>
        /// json转Dictionary字典
        /// </summary>
        /// <param name="json"></param>
        /// <returns></returns>
        public static Dictionary<string, object> ToDic(string json)
        {
            JavaScriptSerializer jss = new JavaScriptSerializer();
            Dictionary<string, object> dic = jss.Deserialize<Dictionary<string, object>>(json);
            return dic;
        }


        #endregion

        #region DataTable转json二维数组


        /// <summary>
        /// DataSet转json二维数组
        /// </summary>
        /// <param name="dataSet"></param>
        /// <returns></returns>
        public static string ToArrJson(DataSet dataSet)
        {
            string jsonString = "";
            foreach (DataTable table in dataSet.Tables)
            {
                jsonString += ToArrJson(table) + ",";
            }
            jsonString = jsonString.TrimEnd(',');
            return jsonString;
        }



        /// <summary>
        /// DataTable转json二维数组
        /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static string ToArrJson(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)
                    {
                        jsonString.Append(strValue + ",");
                    }
                    if (j == dt.Columns.Count - 1)
                    {
                        jsonString.Remove(jsonString.Length - 1, 1);
                    }
                }
                jsonString.Append("],");
            }
            jsonString.Remove(jsonString.Length - 1, 1);
            jsonString.Append("]");
            return jsonString.ToString();
        }

        #endregion

        #region Json转换别的类型

        /// <summary>
        /// 将json转换为DataTable
        /// </summary>
        /// <param name="strJson">得到的json</param>
        /// <returns></returns>
        public static DataTable JsonToDataTable(string strJson)
        {
            //转换json格式
            strJson = strJson.Replace(","", "*"").Replace("":", ""#").ToString();
            //取出表名   
            var rg = new Regex(@"(?<={)[^:]+(?=:[)", RegexOptions.IgnoreCase);
            string strName = rg.Match(strJson).Value;
            DataTable tb = null;
            //去除表名   
            strJson = strJson.Substring(strJson.IndexOf("[") + 1);
            strJson = strJson.Substring(0, strJson.IndexOf("]"));

            //获取数据   
            rg = new Regex(@"(?<={)[^}]+(?=})");
            MatchCollection mc = rg.Matches(strJson);
            for (int i = 0; i < mc.Count; i++)
            {
                string strRow = mc[i].Value;
                string[] strRows = strRow.Split('*');

                //创建表   
                if (tb == null)
                {
                    tb = new DataTable();
                    tb.TableName = strName;
                    foreach (string str in strRows)
                    {
                        var dc = new DataColumn();
                        string[] strCell = str.Split('#');

                        if (strCell[0].Substring(0, 1) == """)
                        {
                            int a = strCell[0].Length;
                            dc.ColumnName = strCell[0].Substring(1, a - 2);
                        }
                        else
                        {
                            dc.ColumnName = strCell[0];
                        }
                        tb.Columns.Add(dc);
                    }
                    tb.AcceptChanges();
                }

                //增加内容   
                DataRow dr = tb.NewRow();
                for (int r = 0; r < strRows.Length; r++)
                {
                    dr[r] = strRows[r].Split('#')[1].Trim().Replace("，", ",").Replace("：", ":").Replace(""", "");
                }
                tb.Rows.Add(dr);
                tb.AcceptChanges();
            }

            return tb;
        }



        /// <summary>
        /// json数组转换为ArrayList
        /// </summary>
        /// <param name="json"></param>
        /// <returns></returns>
        public static List<ArrayList> JsonToArrayList(string json)
        {
            JavaScriptSerializer jss = new JavaScriptSerializer();
            List<ArrayList> arr = jss.Deserialize<List<ArrayList>>(json);
            return arr;
        }

        /// <summary>
        /// ArrayList转换为json数组
        /// </summary>
        /// <param name="json"></param>
        /// <returns></returns>
        public static string ArrayListToJson(List<ArrayList> arr)
        {
            JavaScriptSerializer jss = new JavaScriptSerializer();
            string json = jss.Serialize(arr);
            return json;
        }

        ///// <summary>
        ///// 将json数组转换为DataTable
        ///// </summary>
        ///// <param name="json">得到的json</param>
        /////  <param name="ColumnNumber">几列</param>
        /////  <param name="dtName">表名</param>
        ///// <returns></returns>
        //public static DataTable JsonArrToDataTable(string json, int ColumnNumber, string dtName = "dtarr")
        //{

        //    JavaScriptSerializer jss = new JavaScriptSerializer();
        //    List<ArrayList> arr = jss.Deserialize<List<ArrayList>>(json);
        //    DataTable tb = new DataTable();
        //    tb.TableName = dtName;

        //    DataColumn dc = null;
        //    for (int r = 0; r < 1; r++)
        //    {
        //        dc = new DataColumn();
        //        dc.ColumnName = arr[i][r].ToString();
        //    }
        //    tb.Columns.Add(dc);
        //    for (int i = 0; i < arr.Count; i++)
        //    {

        //        DataRow dr = tb.NewRow();
        //        tb.Rows.Add(dr);
        //        tb.AcceptChanges();
        //    }

        //    return tb;
        //}


        #endregion

        #region json扩展信息

        /// <summary>
        /// <para>json扩展对象</para>
        /// <para>此方法必须调用ToJson方法生成的json才可以，就是与ToJson方法配合使用</para>
        /// <para>调用ToJsonExtended(json, "test", "{"msg":"测试消息"}");</para>
        /// <para>生成后的json比如： {"ds":[{"p_Id":3,"p_Code":"QHO50S","p_Name":"前海油"}],"test":{"msg":"测试消息"}}</para>
        /// </summary>
        /// <param name="json">原json字符串</param>
        /// <param name="Name">扩展json对象名</param>
        /// <param name="jsonobj">扩展json对象</param>
        /// <returns>返回json字符串</returns>
        public static string ToJsonExtended(string json, string Name, string jsonobj)
        {

            json = json.Insert(json.Length - 1, ","" + Name + "":" + jsonobj);
            return json;
        }

        /// <summary>
        /// <para>此方法通用无需配合其他方法，最好与ToStandardJson配合方法使用</para>
        /// <para>如与ToJson方法一起使用会出现{"ds":{"ds":[{}]}}多层对象</para>
        /// <para>调用ToStandardJsonExtended(json, "test", "{"msg":"测试消息"}");</para>
        /// <para>如需多个json调用ToStandardJsonExtended(json, "test", "{"msg":"测试消息"}, "test2": {"msg2": "测试消息2"}");</para>
        /// </summary>
        /// <param name="json">原json</param>
        /// <param name="Name">扩展json名</param>
        /// <param name="jsonobj">扩展json对象</param>
        /// <returns></returns>
        public static string ToStandardJsonExtended(string json, string Name, string jsonobj)
        {
            json = json.Insert(0, "{"ds":");
            json = json.Insert(json.Length, ","" + Name + "":" + jsonobj + "}");
            return json;
        }

        #endregion
    }
}