asp.net 返回树结构的json数据 辅助类(我用在ext树结构上)
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Runtime.Serialization;
/// <summary>
/// JSONHelper 的摘要说明
/// </summary>
public class DTreeJSONHelper
{
//对应JSON的singleInfo成员
public string singleInfo = string.Empty;
protected string _error = string.Empty;
protected bool _success = true;
protected long _totalCount = 0;
protected System.Collections.ArrayList arrData = new ArrayList();
protected System.Collections.ArrayList arrDataItem = new ArrayList();
public DTreeJSONHelper()
{
}
//对应于JSON的success成员
public bool success
{
get
{
return _success;
}
set
{
//如设置为true则清空error
if (success) _error = string.Empty;
_success = value;
}
}
//对应于JSON的error成员
public string error
{
get
{
return _error;
}
set
{
//如设置error,则自动设置success为false
if (value != "") _success = false;
_error = value;
}
}
public long totlalCount
{
get { return _totalCount; }
set { _totalCount = value; }
}
//重置,每次新生成一个json对象时必须执行该方法
public void Reset()
{
_success = true;
_error = string.Empty;
singleInfo = string.Empty;
arrData.Clear();
arrDataItem.Clear();
}
public void AddItem(string name, string value)
{
if (name == "leaf" && value=="1")
{
value = "true";
arrData.Add("" + name + ":" + "" + value + "");
}
else if (name == "leaf" && value == "0")
{
value = "false";
arrData.Add("" + name + ":" + "" + value + "");
}
else if (name == "checked" && value == "1")
{
value = "true";
arrData.Add("" + name + ":" + "" + value + "");
}
else if (name == "checked" && value == "0")
{
value = "false";
arrData.Add("" + name + ":" + "" + value + "");
}
else
{
arrData.Add("" + name + ":\"" + "" + value + "\"");
}
}
public void ItemOk()
{
arrData.Add("<BR>");
//返回总记录条数
totlalCount++;
}
//序列化JSON对象,得到返回的JSON代码
public override string ToString()
{
StringBuilder sb = new StringBuilder();
sb.Append("[");
int index = 0;
sb.Append("{");
if (arrData.Count <= 0)
{
sb.Append("}");
}
else
{
foreach (string val in arrData)
{
index++;
if (val != "<BR>")
{
sb.Append(val + ",");
}
else
{
sb = sb.Replace(",", "", sb.Length - 1, 1);
sb.Append("},");
if (index < arrData.Count)
{
sb.Append("{");
}
}
}
sb = sb.Replace(",", "", sb.Length - 1, 1);
sb.Append("");
}
sb.Append("]");
return sb.ToString();
}
}