DAL/Contents.cs

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

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

		/// <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_Contents");
			strSql.Append(" where Id=@Id");
             
			OleDbParameter[] parameters = {
					new OleDbParameter("@Id", OleDbType.Integer ,4)
};
			parameters[0].Value = Id;

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


		/// <summary>
		/// 增加一条数据
		/// </summary>
		public int Add(cosmos.Model.Contents model)
		{
			StringBuilder strSql=new StringBuilder();
			strSql.Append("insert into tb_Contents(");
			strSql.Append("Title,Content,PubTime)");
			strSql.Append(" values (");
			strSql.Append("@Title,@Content,@PubTime)");
            //strSql.Append(";select @@IDENTITY");
			OleDbParameter[] parameters = {
					new OleDbParameter("@Title", OleDbType.VarChar,100),
					new OleDbParameter("@Content", OleDbType.LongVarChar),
					new OleDbParameter("@PubTime", OleDbType.Date)};
			parameters[0].Value = model.Title;
			parameters[1].Value = model.Content;