DAL/AccountInfoDAL.cs

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

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

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

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


		/// <summary>
		/// 增加一条数据
		/// </summary>
		public int Add(Models.AccountInfo model)
		{
			StringBuilder strSql=new StringBuilder();
			strSql.Append("insert into AccountInfo(");
			strSql.Append("Account,AccountName,Pwd)");
			strSql.Append(" values (");
			strSql.Append("@Account,@AccountName,@Pwd)");
			strSql.Append(";select @@IDENTITY");
			SqlParameter[] parameters = {
					new SqlParameter("@Account", SqlDbType.NVarChar,64),
					new SqlParameter("@AccountName", SqlDbType.NVarChar,50),
					new SqlParameter("@Pwd", SqlDbType.NVarChar,50)};
			parameters[0].Value = model.Account;
			parameters[1].Value = model.AccountName;
			parameters[2].Value = model.Pwd;

			object obj = DbHelperSQL.GetSingle(strSql.ToString(),parameters);