JSONHelper.CS三层架构中搜集整理的代码

参考网址：http://www.cnblogs.com/shenshi/archive/2009/05/19/1460466.html

1。添加系统引用

//添加引用VS2005中添加System.Web.Extensions.dll的引用
using System.Web;
using System.Web.Script.Serialization;
using System.Data;
using System.Collections;

2.详细代码

/// <summary>
/// JSONHelper 的摘要说明
/// </summary>
public class JSONHelper
{
//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 JSONHelper()
{

}

//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)
{
arrData.Add("/"" + name + "/":" + "/"" + value + "/"");
}

public void ItemOk()
{
arrData.Add("<BR>");
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("{");
sb.Append("totalCount:" + totlalCount.ToString() + ",");
sb.Append("success:" + _success.ToString().ToLower() + ",");
sb.Append("error:/"" + _error.Replace("/"", "///"") + "/",");
sb.Append("singleInfo:/"" + singleInfo.Replace("/"", "///"") + "/",");
sb.Append("data:[");

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();
}
}