App_Code/DAL/user.cs

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using System;
using System.Data;
using System.Data.OleDb;
using System.Text;
using Maticsoft.DBUtility;//请先添加引用
namespace Maticsoft.DAL
{
	/// <summary>
	/// 数据访问类user。
	/// </summary>
	public class user
	{
        StringBuilder strSql = null;
       
		public user()
		{}
		#region  成员方法


		/// <summary>
		/// 是否存在该记录
		/// </summary>
        public bool Exists(string username)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select count(1) from user");
            strSql.Append(" where username=" + username + " ");
            return DbHelperOleDb.Exists(strSql.ToString());
        }
		/// <summary>
		/// 增加一条数据
		/// </summary>
		public void Add(Maticsoft.Model.user model)
		{
			StringBuilder strSql=new StringBuilder();


            strSql.Append("INSERT INTO [user] ( [username], [userpass]) VALUES ('"+model.admin+"', '"+model.pass+"')");
			
			DbHelperOleDb.ExecuteSql(strSql.ToString());
		}

		/// <summary>
		/// 更新一条数据
		/// </summary>
		public void Update(Maticsoft.Model.user model)
		{
			StringBuilder strSql=new StringBuilder();
			strSql.Append("update user set ");
			if (model.id != null)
			{
				strSql.Append("id="+model.id+",");
			}
			if (model.admin != null)
			{
				strSql.Append("username='"+model.admin+"',");
			}
			if (model.pass != null)
			{
				strSql.Append("userpass='"+model.pass+"',");