一、AjaxMethod
using System;
using System.Data;
using System.Data.SqlClient;

namespace AjaxImage
{
    /**//// <summary>
    /// AjaxMethod 的摘要说明。
    /// </summary>
    public class AjaxMethod
    {
        public AjaxMethod()
        {           
        }
        public static string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"].ToString();

        GetDataSet#region GetDataSet
        public static DataSet GetDataSet(string sql)
        {
            SqlDataAdapter sda = new SqlDataAdapter(sql, ConnectionString);
            DataSet ds = new DataSet();
            sda.Fill(ds);
            if (ds != null)
                return ds;
            else
                return null;
        }
        #endregion

     &

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