C#如何根据时间控件显示数据库中对应信息(上)

前言

听说有的朋友们机房合作时只用了两天就把代码编写完成了，但我实际编码时却经常被卡住，还是技术不到家啊，重构时用到的复用性强的还可以，以前没做过的可就懵逼了。所以，我又要开始一波总结了。

这里分为两部分：根据一个时间控件显示信息在这篇。根据两个时间控件显示信息请见下篇

选定时间，显示信息

简单说明下需求：我要让datagridview控件根据时间显示数据库中对应的记录

纵使我们不知道该如何实现，但我们还是可以肯定一定要走一遍七层，从结账表中根据条件查找信息......

<1>Entity层。按表建的实体，要查询的是结账记录，所以实体中要有结账表的所有属性，并且我还加上了一个用来接收DTPicker的字段

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Entity
{
    //结账表实体类
    public class CheckDayEntity
    {
        //当前余额
        private double remainCash;
        public double RemainCash
        {
            get { return remainCash; }
            set { remainCash = value; }
        }

        //充值金额
        private double rechargeCash;
        public double RechargeCash  
        {
            get { return rechargeCash; }
            set { rechargeCash = value; }
        }

        //消费金额
        private double consumeCash;
        public double ConsumeCash
        {
            get { return consumeCash; }
            set { consumeCash = value; }
        }

        //退卡金额
        private double cancelCash;
        public double CancelCash
        {
            get { return cancelCash; }
            set { cancelCash = value; }
        }

        //净利润
        private double allCash;
        public double AllCash
        {
            get { return allCash; }
            set { allCash = value; }
        }

        //结账日期
        private string date;
        public string Date
        {
            get { return date; }
            set { date = value; }
        }

        //结账人
        private string head;
        public string Head
        {
            get { return head; }
            set { head = value; }
        }

        //选择的结账日期
        private string dtpDate;
        public string DtpDate
        {
            get { return dtpDate; }
            set { dtpDate = value; }
        }
    }
}

<2>IDAL层

namespace IDAL
{
     public interface ICheckDay
    {
        List<Entity.CheckDayEntity> QueryCheckDay(Entity.CheckDayEntity check);
    }
}

<3>DAL层

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.Data.SqlClient;
using Entity;
using IDAL;

namespace DAL
{
    public class CheckDayDAL : IDAL.ICheckDay
    {
        List<CheckDayEntity> ICheckDay.QueryCheckDay(CheckDayEntity check)
        {
            SQLHelper sqlhelper = new SQLHelper();
            SqlParameter[] sqlparams = { new SqlParameter("@dtpDate", check.DtpDate)};
            string sql = @"SELECT * FROM T_CheckDay WHERE date = @dtpDate";
            DataTable table = sqlhelper.ExecuteQuery(sql, sqlparams, CommandType.Text);

            //将Datatable类型转换为list泛型
            ConvertHelper ct = new ConvertHelper();
            List<Entity.CheckDayEntity> List = new List<Entity.CheckDayEntity>();
            List = ct.ConvertTomodel<Entity.CheckDayEntity>(table);
            return List;
        }
    }
}

<4>Factory层

        ///// <summary>
        ///// 日结账单查询
        ///// </summary>
        ///// <returns></returns>
        public IDAL.ICheckDay QueryCheckDay()
        {
            string ClassName = StrDB + "." + "CheckDayDAL";  //DAL层的类名
            return (IDAL.ICheckDay)Assembly.Load(StrDB).CreateInstance(ClassName);   //反射+工厂的应用
        }

<5>BLL层

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BLL
{
    public class CheckDayBLL
    {
        public List<Entity.CheckDayEntity> QueryCheckDay(Entity.CheckDayEntity check)
        {
            Factory.AdministratorFactory fact = new Factory.AdministratorFactory();
            IDAL.ICheckDay idal = fact.QueryCheckDay();
            return idal.QueryCheckDay(check);
        }
    }
}

<6>Facade层

    public class CheckDayFacade
    {
        public List<Entity.CheckDayEntity> QueryCheckDay(Entity.CheckDayEntity check)
        {
            return new BLL.CheckDayBLL().QueryCheckDay(check);
        }
    }

<7>UI层

        private void btnQuery_Click(object sender, EventArgs e)
        {
            //根据日期来显示结账信息
            DateTime dt;
            dt = Convert.ToDateTime(dtpDate.Value.Date.ToString("yyyy-MM-dd"));

            Entity.CheckDayEntity checkday = new Entity.CheckDayEntity();
            checkday.DtpDate = dt.ToString("yyyy-MM-dd");

            Facade.CheckDayFacade facade = new Facade.CheckDayFacade();
            List<Entity.CheckDayEntity> list = new List<Entity.CheckDayEntity>();
            list = facade.QueryCheckDay(checkday);
            if (list.Count <= 0)
            {
                MessageBox.Show("改日暂无结账记录");
                dataGridView1.DataSource = "";
            }
            else
            {
                dataGridView1.DataSource = list;
                dataGridView1.Columns[0].HeaderText = "累计收益";
                dataGridView1.Columns[1].HeaderText = "当日充值金额";
                dataGridView1.Columns[2].HeaderText = "当日消费金额";
                dataGridView1.Columns[3].HeaderText = "当日退卡金额";
                dataGridView1.Columns[4].HeaderText = "今日净收入";
                dataGridView1.Columns[5].HeaderText = "日期";
                dataGridView1.Columns[6].HeaderText = "结账人";
                dataGridView1.Columns[7].Visible = false;   //因为实体层中加入了dtpicker控件，如果不设置成false这一列会显示在datagridview上
            }
        }

大功告成！

C#如何根据时间控件显示数据库中对应信息(上)

前言

选定时间，显示信息

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