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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
/// <summary>
/// DB µÄÕªÒªÃèÊö
/// </summary>
public class DB
{
    OleDbConnection conn = null;
    OleDbCommand cmd = new OleDbCommand();
 public DB()
 {
  //
  // TODO: Ôڴ˼ÓÈ뽨構º¯Ê½µÄ³Ìʽ碼
  //
        string dbname = System.Web.HttpContext.Current.Server.MapPath("DB_App/netData.aspx");
        string conStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+dbname;
        conn = new OleDbConnection(conStr);
 }
    public OleDbConnection getConn()
    {
        if (conn.State == ConnectionState.Closed)
            conn.Open();
        return conn;
    }
    public void clear()
    {
        if(conn.State==ConnectionState.Open)
            conn.Close();
    }
    public string getScalar(string strSql)
    {
        cmd.Connection = getConn();
        cmd.CommandText = strSql;
        string result = cmd.ExecuteScalar().ToString();
        clear();
        return result;
    }
    public int getReturnNum(string strSql)
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using System;
using System.Collections.Generic;
using System.Collections;
using System.Text;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
using System.Threading;
namespace DownData
{
    class internet
    {
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