vote.cs

来自「《精通ASP.NET2.0网络应用系统开发》书中的源码」· CS 代码 · 共 114 行

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using SQLHelper;
using System.Data.SqlClient;

namespace WebVote
{
	/// <summary>
	/// Summary description for Vote
	/// </summary>
	public class Vote
	{
		public SqlDataReader GetVotes()
		{
			///定义类SQLHelper
			SQLHelper.SQLHelper sqlHelper = new SQLHelper.SQLHelper();

			///定义保存从数据库获取的结果的DataReader
			SqlDataReader dr = null;

			try
			{
				///执行存储过程
				sqlHelper.RunProc("Pr_GetVotes", out dr);
			}
			catch (Exception ex)
			{
				///抛出执行数据库异常
				SystemError.CreateErrorLog(ex.Message);
				throw new Exception(ex.Message, ex);
			}

			///返回从数据库获取的结果
			return (dr);
		}

		public int AddVote(String sItem)
		{
			///定义类SQLHelper
			SQLHelper.SQLHelper sqlHelper = new SQLHelper.SQLHelper();

			///创建访问数据库的参数			
			SqlParameter[] paramList = {
                sqlHelper.CreateInParam("@Item", SqlDbType.VarChar,100,sItem)
            };

			try
			{
				///执行存储过程
				return (sqlHelper.RunProc("Pr_AddVote", paramList));
			}
			catch (Exception ex)
			{
				///抛出执行数据库异常
				SystemError.CreateErrorLog(ex.Message);
				throw new Exception(ex.Message, ex);
			}
		}

		public void UpdateVote(int nVoteID)
		{
			///定义类SQLHelper
			SQLHelper.SQLHelper sqlHelper = new SQLHelper.SQLHelper();

			///创建访问数据库的参数			
			SqlParameter[] paramList = {
                sqlHelper.CreateInParam("@VoteID", SqlDbType.Int, 4,nVoteID)
            };

			try
			{
				///执行存储过程
				sqlHelper.RunProc("Pr_UpdateVote", paramList);
			}
			catch (Exception ex)
			{
				///抛出执行数据库异常
				SystemError.CreateErrorLog(ex.Message);
				throw new Exception(ex.Message, ex);
			}
		}

		public void DeleteVote(int nVoteID)
		{
			///定义类SQLHelper
			SQLHelper.SQLHelper sqlHelper = new SQLHelper.SQLHelper();

			///创建访问数据库的参数			
			SqlParameter[] paramList = {
				sqlHelper.CreateInParam("@VoteID", SqlDbType.Int, 4,nVoteID)
			};

			try
			{
				///执行存储过程
				sqlHelper.RunProc("Pr_DeleteVote", paramList);
			}
			catch (Exception ex)
			{
				///抛出执行数据库异常
				SystemError.CreateErrorLog(ex.Message);
				throw new Exception(ex.Message, ex);
			}
		}
	}
}