App_Code/DAL/DataAccess.cs

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using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Collections.Generic;

namespace DAL
{


    public class DataAccess
    {


        public static int count = 0;
        public static int counts = 0;
 


        private static string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        public DataAccess()
        {
            //
            //TODO: 在此处添加构造函数逻辑
            //
        }

        public static int Number()
        {
            return count;

        }


        #region//执行返回一个表操作（无参数类型）
        public static DataTable Execute(string strSql)
        {
            SqlDataAdapter sda = new SqlDataAdapter(strSql, connectionString);
            DataSet ds = new DataSet();
            sda.SelectCommand.Parameters.Clear();
            sda.Fill(ds);
            return ds.Tables[0];
        }
        #endregion

        #region//执行删除，修改，插入操作（无参数类型）
        public static int ExecuteNo(string strsql)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                SqlCommand command = new SqlCommand(strsql, conn);
                try