1using System;
  2using System.Collections;
  3using System.Collections.Generic;
  4using System.Text;
  5using System.Web.Script.Serialization;
  6
  7/**//// <summary>
  8/// JSONHelper 的摘要说明
  9/// </summary>
 10public class JSONHelper
 11...{
 12    //对应JSON的singleInfo成员
 13    public string singleInfo = string.Empty;
 14
 15    protected string _error = string.Empty;
 16    protected bool _success = true;
 17    protected long _totalCount = 0;
 18    protected System.Collections.ArrayList arrData = new ArrayList();
 19    protected System.Collections.ArrayList arrDataItem = new ArrayList();
 20
 21
 22    public JSONHelper()
 23    ...{
 24
 25    }
 26
 27    public static string ToJSON(object obj)
 28    ...{
 29        JavaScriptSerializer serializer = new JavaScriptSerializer();
 30        return serializer.Serialize(obj);
 31    }
 32
 33    public static string ToJSON(object obj, int recursionDepth)
 34    ...{
 35        JavaScriptSerializer serializer = new JavaScriptSerializer();
 36        serializer.RecursionLimit = recursionDepth;
 37        return serializer.Serialize(obj);
 38    }
 39
 40    //对应于JSON的success成员
 41    public bool success
 42    ...{
 43        get
 44        ...{
 45            return _success;
 46        }
 47        set
 48        ...{
 49            //如设置为true则清空error
 50            if (success) _error = string.Empty;
 51            _success = value;
 52        }
 53    }
 54
 55    //对应于JSON的error成员
 56    public string error
 57    ...{
 58        get
 59        ...{
 60            return _error;
 61        }
 62        set
 63        ...{
 64            //如设置error，则自动设置success为false
 65            if (value != "") _success = false;
 66            _error = value;
 67        }
 68    }
 69
 70    public long totlalCount
 71    ...{
 72        get ...{ return _totalCount; }
 73        set ...{ _totalCount = value; }
 74    }
 75
 76
 77    //重置，每次新生成一个json对象时必须执行该方法
 78    public void Reset()
 79    ...{
 80        _success = true;
 81        _error = string.Empty;
 82        singleInfo = string.Empty;
 83        arrData.Clear();
 84        arrDataItem.Clear();
 85    }
 86
 87
 88
 89    public void AddItem(string name, string value)
 90    ...{
 91        arrData.Add("\"" + name + "\":" + "\"" + value + "\"");
 92    }
 93
 94
 95
 96    public void ItemOk()
 97    ...{
 98        arrData.Add("<BR>");
 99    }
100
101    //序列化JSON对象，得到返回的JSON代码
102    public override string ToString()
103    ...{
104        StringBuilder sb = new StringBuilder();
105        sb.Append("{");
106        sb.Append("totalCount:" + totlalCount.ToString() + ",");
107        sb.Append("success:" + _success.ToString().ToLower() + ",");
108        sb.Append("error:\"" + _error.Replace("\"", "\\\"") + "\",");
109        sb.Append("singleInfo:\"" + singleInfo.Replace("\"", "\\\"") + "\",");
110        sb.Append("data:[");
111
112        int index = 0;
113        sb.Append("{");
114        if (arrData.Count <= 0)
115        ...{
116            sb.Append("}]");
117        }
118        else
119        ...{
120            foreach (string val in arrData)
121            ...{
122                index++;
123
124                if (val != "<BR>")
125                ...{
126                    sb.Append(val + ",");
127                }
128                else
129                ...{
130                    sb = sb.Replace(",", "", sb.Length - 1, 1);
131                    sb.Append("},");
132                    if (index < arrData.Count)
133                    ...{
134                        sb.Append("{");
135                    }
136                }
137
138            }
139            sb = sb.Replace(",", "", sb.Length - 1, 1);
140            sb.Append("]");
141        }
142
143        sb.Append("}");
144        return sb.ToString();
145    }
146}
147