常用的C#类

using System;  
using System.Collections.Generic;  
using System.Data;  
using System.Linq;  
using System.Text;  
using System.Web;  
   
   
/// 
  
/// DataTableConvertJson 的摘要说明  
/// 
  
public class DataTableConvertJson  
{  
    public DataTableConvertJson()  
    {  
        //  
        // TODO: 在此处添加构造函数逻辑  
        //  
    }  
  
  
    #region dataTable转换成Json格式  
    /// 
    
    /// dataTable转换成Json格式    
    /// 
    
    ///     
    ///     
    public static string DataTable2Json(DataTable dt)  
    {  
        StringBuilder jsonBuilder = new StringBuilder();  
        //jsonBuilder.Append("{\"");  
        //jsonBuilder.Append(dt.TableName);  
        //jsonBuilder.Append("[");  
        jsonBuilder.Append("[");  
        for (int i = 0; i     
    /// DataSet转换成Json格式    
    ///     
    /// DataSet   
    ///     
    public static string Dataset2Json(DataSet ds)  
    {  
        StringBuilder json = new StringBuilder();  
   
   
        foreach (DataTable dt in ds.Tables)  
        {  
            json.Append("{\"");  
            json.Append(dt.TableName);  
            json.Append("\":");  
            json.Append(DataTable2Json(dt));  
            json.Append("}");  
        } return json.ToString();  
    }  
    #endregion  
   
   
    /// 
  
    /// Msdn  
    /// 
  
    ///   
    ///   
    ///   
    public static string DataTableToJson(string jsonName, DataTable dt)  
    {  
        StringBuilder Json = new StringBuilder();  
        Json.Append("{\"" + jsonName + "\":[");  
        if (dt.Rows.Count > 0)  
        {  
            for (int i = 0; i