将DataSet里的数据转换成Json格式

转：http://www.cnblogs.com/simonblog/archive/2010/05/12/1733139.html

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;

namespace ConsoleApplication1
{
public static class DataSetToJson
{
public static string DSToJson(this DataSet ds, string JsonName, string[] ParName)
{
try
{
if (ds == null)
{
return "DataSet Is Null ,So I Can't Do It To Json!";
}
if (JsonName.Length < 1)
{
return "You Set The Json Name Is Wrong!";
}
if (ds.Tables[0].Columns.Count < ParName.Length)
{
return "You Give The ParName Is Bigger Than DataSet Columns!";
}
string josn = "{" + JsonName + ":[";
string temp = "";
for (int j = 0; j < ds.Tables[0].Rows.Count; j++)
{
temp = temp + "{";
for (int i = 0; i < ParName.Length; i++)
{
temp += "" + ParName[i] + ":\'" + ds.Tables[0].Rows[j][ParName[i]] + "\'";
if (i != ParName.Length - 1)
{
temp = temp + ",";
}
}
if (j == ds.Tables[0].Rows.Count - 1)
{
temp = temp + "}";
}
else
{
temp = temp + "},";
}
}
josn = josn + temp + "]}";
return josn;
}
catch (Exception ex)
{
return "Codeing is Error----" + ex.ToString();
}
}
}
}

这是一种对数据取出的数据进行转换成json格式，还有一种就是可以把数据库里的数据存入到一个IList<>里，然后通过json里的JsonWriter来转换成json格式，这里就不显示代码了，，