DAL/KeyWordInfoService.cs

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using System;
using System.Data;
using System.Text;
using System.Data.SqlClient;

namespace DAL
{
	/// <summary>
	/// 数据访问类KeyWordInfoService。
	/// </summary>
	public class KeyWordInfoService
	{
		public KeyWordInfoService()
		{}
		#region  成员方法
		/// <summary>
		/// 是否存在该记录
		/// </summary>
        public static bool Exists(string pageNameValue)
		{
			StringBuilder strSql=new StringBuilder();
			strSql.Append("select count(1) from KeyWordInfo");
            strSql.Append(" where pageNameValue=@pageNameValue ");
			SqlParameter[] parameters = {
					new SqlParameter("@pageNameValue", SqlDbType.VarChar,54)};
            parameters[0].Value = pageNameValue;

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


		/// <summary>
		/// 增加一条数据
		/// </summary>
		public static int Add(Model.KeyWordInfo model)
		{
			StringBuilder strSql=new StringBuilder();
			strSql.Append("insert into KeyWordInfo(");
			strSql.Append("pageName,title,keyword,description,pageNameValue)");
			strSql.Append(" values (");
			strSql.Append("@pageName,@title,@keyword,@description,@pageNameValue)");
			strSql.Append(";select @@IDENTITY");
			SqlParameter[] parameters = {
					new SqlParameter("@pageName", SqlDbType.VarChar,50),
					new SqlParameter("@title", SqlDbType.VarChar,50),
					new SqlParameter("@keyword", SqlDbType.VarChar,150),
					new SqlParameter("@description", SqlDbType.VarChar,350),
					new SqlParameter("@pageNameValue", SqlDbType.VarChar,50)};
			parameters[0].Value = model.pageName;
			parameters[1].Value = model.title;
			parameters[2].Value = model.keyword;
			parameters[3].Value = model.description;
			parameters[4].Value = model.pageNameValue;

			object obj = DBHelperSQL.GetSingle(strSql.ToString(),parameters);
			if (obj == null)
			{
				return 1;
			}
			else