DAL/Member.cs

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using System;
using System.Data;
using System.Text;
using System.Data.SqlClient;
using System.Data.Common;
using DBUtility;
namespace DAL
{
	/// <summary>
    /// 数据访问类:会员
	/// </summary>
	public partial class Member
	{
        public Member()
		{}
		#region  Method

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

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

			return DbHelperSQL.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 Members where UserName=@UserName";
            SqlParameter[] parameters = {
                new SqlParameter("@UserName",SqlDbType.NVarChar,30)};
            parameters[0].Value = UserName;
            return DbHelperSQL.Exists(strSql, parameters);
        }

        /// <summary>
        /// 检查用户名是否重复
        /// </summary>
        /// <param name="UserName"></param>
        /// <returns></returns>
        public bool ExistsQQ(string QQ)