SQLServerDAL/orderdetail.cs

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using System;
using System.Data;
using System.Text;
using System.Data.SqlClient;
using CAI.SHOP.IDAL;
using Maticsoft.DBUtility;//请先添加引用
namespace CAI.SHOP.SQLServerDAL
{
	/// <summary>
	/// 数据访问类orderdetail。
	/// </summary>
	public class orderdetail:Iorderdetail
	{
		public orderdetail()
		{}
		#region  成员方法

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

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

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


		/// <summary>
		/// 增加一条数据
		/// </summary>
		public int Add(CAI.SHOP.Model.orderdetail model)
		{
			StringBuilder strSql=new StringBuilder();
			strSql.Append("insert into orderdetail(");
			strSql.Append("pid,shuliang,orderid,producttotail)");
			strSql.Append(" values (");
			strSql.Append("@pid,@shuliang,@orderid,@producttotail)");
			strSql.Append(";select @@IDENTITY");
			SqlParameter[] parameters = {
					new SqlParameter("@pid", SqlDbType.Int,4),
					new SqlParameter("@shuliang", SqlDbType.Int,4),
					new SqlParameter("@orderid", SqlDbType.VarChar,50),
					new SqlParameter("@producttotail", SqlDbType.Decimal,9)};
			parameters[0].Value = model.pid;
			parameters[1].Value = model.shuliang;
			parameters[2].Value = model.orderid;