DAL/news.cs

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

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

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

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


		/// <summary>
		/// 增加一条数据
		/// </summary>
		public int Add(PSD.Model.news model)
		{
			StringBuilder strSql=new StringBuilder();
			strSql.Append("insert into news(");
			strSql.Append("title,tid,memo,atime)");
			strSql.Append(" values (");
			strSql.Append("@title,@tid,@memo,@atime)");
			strSql.Append(";select @@IDENTITY");
			SqlParameter[] parameters = {
					new SqlParameter("@title", SqlDbType.VarChar,50),
					new SqlParameter("@tid", SqlDbType.Int,4),
					new SqlParameter("@memo", SqlDbType.NText),
					new SqlParameter("@atime", SqlDbType.DateTime)};
			parameters[0].Value = model.title;
			parameters[1].Value = model.tid;
			parameters[2].Value = model.memo;