DAL/Admin.cs

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using System;
using System.Data;
using System.Text;
//using System.Data.SqlClient;
using Maticsoft.DBUtility;//Please add references
using System.Data.OleDb;
namespace cosmos.DAL
{
    /// <summary>
    /// 数据访问类:Admin
    /// </summary>
    public partial class Admin
    {
        public Admin()
        { }
        #region  Method

        /// <summary>
        /// 得到最大ID
        /// </summary>
        public int GetMaxId()
        {
            return DbHelperOleDb.GetMaxID("Id", "tb_Admin");
        }

        /// <summary>
        /// 是否存在该记录
        /// </summary>
        public bool Exists(int Id)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select count(1) from tb_Admin");
            strSql.Append(" where Id=@Id");
            OleDbParameter[] parameters = {
					new OleDbParameter("@Id", OleDbType.Integer,4)};
            parameters[0].Value = Id;

            return DbHelperOleDb.Exists(strSql.ToString(), parameters);
        }

        /// <summary>
        /// 检查用户名是否重复
        /// </summary>
        /// <param name="UserName"></param>
        /// <returns></returns>
        public bool Exists(string UserName)
        {
            string strSql = "select count(*) from tb_Admin where UserName=@UserName";
            OleDbParameter[] parameters = {
                new OleDbParameter("@UserName",OleDbType.VarChar,30)};
            parameters[0].Value = UserName;
            return DbHelperOleDb.Exists(strSql.ToString(), parameters);
        }

        /// <summary>
        /// 检查登录用户
        /// </summary>
        /// <param name="UserName">用户名</param>
        /// <param name="UserPwd">密码</param>
        /// <returns></returns>