App_Code/DB.cs

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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;
using System.Text.RegularExpressions;
using Maticsoft.DBUtility;
/// <summary>
/// DB 的摘要说明
/// </summary>
public class DB
{
    public static string connectionString = PubConstant.ConnectionString;     
	public DB()
	{
		//
		// TODO: 在此处添加构造函数逻辑
		//
	}
    public static OleDbConnection Getconn()
    {
        OleDbConnection conn = new OleDbConnection(connectionString);
      
        return conn;
    
    }
    //=================================================
    //功能描述：关闭数据库
 
    //=================================================
    private static void closeConnection()
    {
        OleDbConnection conn = DB.Getconn();
        OleDbCommand cmd = new OleDbCommand();
        if (conn.State == ConnectionState.Open)
        {
            conn.Close();
            conn.Dispose();
            cmd.Dispose();
        }
    }
    //=================================================
    //功能描述：执行SQL语句
    //输入参数：sql，查询的SQL语句
    //时间：2007.11.10
    //=================================================
    public static  void execnonsql(string sql)
    {
       
            OleDbConnection conn = DB.Getconn();
            conn.Open();
            OleDbCommand com = new OleDbCommand(sql, conn);
            com.ExecuteNonQuery();
            conn.Close();