目录

演示功能：

点击启动生成页面

步骤：

1、建文件

​编辑

2、添加引用关系

3、根据数据库中的列写Models下的XueshengModels类

4、DAL下的DBHelper（对数据库进行操作）

5、DAL数据访问层下的service文件

6、BLL业务逻辑层下调用DAL的文件

8、这个地方可以进行计算得出小计的数字

9、ui表现层主界面前端部分

10、ui表现层主界面后端部分

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演示功能：

点击启动生成页面

步骤：

1、建文件

下图是三层架构列表，Models里面有模拟数据库中列的类，DAL中有DBHelper和service,BLL中有BllManager文件用于ui界面直接调用

建照片文件图片，数据夹用于展示库存地址 

2、添加引用关系

DAL引用Models文件，BLL引用DAL和Models文件，主文件WebApplication1引用Bll和Models

3、根据数据库中的列写Models下的XueshengModels类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace Models
{public   class GoodsModel{private string goodsID;public string GoodsID{get { return goodsID; }set { goodsID = value; }}private string goodsName;public string GoodsName{get { return goodsName; }set { goodsName = value; }}private  string goodsPic;public  string GoodsPic{get { return goodsPic; }set { goodsPic = value; }}private  string goodsPrice;public  string GoodsPrice{get { return goodsPrice; }set { goodsPrice = value; }}private string goodsStock;public string GoodsStock{get { return goodsStock; }set { goodsStock = value; }}private string xiaoji;public string Xiaoji{get { return xiaoji; }set { xiaoji = value; }}private string zongji;public string Zongji
{get { return zongji; }set { zongji = value; }
}}
}

4、DAL下的DBHelper（对数据库进行操作）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;namespace DAL
{public    class DBHelper{public static string connstr = "server=.;database=GoodsDB;uid=sa;pwd=123123";public static SqlConnection conn = null;public static void connect() {if (conn==null){conn = new SqlConnection(connstr);}conn.Close();conn.Open();}public static bool NoQuery(string sql) {connect();SqlCommand cmd = new SqlCommand(sql,conn);int ret=  cmd.ExecuteNonQuery();conn.Close();return ret > 0;}public static SqlDataReader Read(string sql){connect();SqlCommand cmd = new SqlCommand(sql, conn);return cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);}}
}

5、DAL数据访问层下的service文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;
namespace DAL
{public   class GoodsService{public static List<Models.GoodsModel> ChaXun(){SqlDataReader read=   DBHelper.Read("select * from Goods");List<Models.GoodsModel> list = new List<Models.GoodsModel>();int zong = 0;while (read.Read()){Models.GoodsModel model = new Models.GoodsModel();model.GoodsID = read["GoodsID"].ToString();model.GoodsName = read["GoodsName"].ToString();model.GoodsPic = read["GoodsPic"].ToString();model.GoodsPrice = read["GoodsPrice"].ToString();model.GoodsStock = read["GoodsStock"].ToString();model.Xiaoji = (int.Parse(read["GoodsStock"].ToString()) * int.Parse(read["GoodsPrice"].ToString())).ToString();zong  += int.Parse(read["GoodsStock"].ToString()) * int.Parse(read["GoodsPrice"].ToString());model.Zongji = zong.ToString();list.Add(model);}return list;}public static List<Models.GoodsModel> MoCha(string name){string sql = string.Format("select * from Goods where GoodsName like '%{0}%'",name);SqlDataReader read = DBHelper.Read(sql);List<Models.GoodsModel> list = new List<Models.GoodsModel>();int zong = 0;while (read.Read()){Models.GoodsModel model = new Models.GoodsModel();model.GoodsID = read["GoodsID"].ToString();model.GoodsName = read["GoodsName"].ToString();model.GoodsPic = read["GoodsPic"].ToString();model.GoodsPrice = read["GoodsPrice"].ToString();model.GoodsStock = read["GoodsStock"].ToString();model.Xiaoji = (int.Parse(read["GoodsStock"].ToString()) * int.Parse(read["GoodsPrice"].ToString())).ToString();zong += int.Parse(read["GoodsStock"].ToString()) * int.Parse(read["GoodsPrice"].ToString());model.Zongji = zong.ToString();list.Add(model);}return list;}}
}

6、BLL业务逻辑层下调用DAL的文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace BLL
{public   class GoodsManger{public static List<Models.GoodsModel> ChaXun() {return DAL.GoodsService.ChaXun();}public static List<Models.GoodsModel> MoCha(string name) {return DAL.GoodsService.MoCha(name);}}
}

8、这个地方可以进行计算得出小计的数字

9、ui表现层主界面前端部分

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %><!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><title></title>
</head>
<body><form id="form1" runat="server"><div><asp:Label ID="Label1" runat="server" Text="Label">商品名称：</asp:Label><asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <asp:Button ID="Button1" runat="server" Text="按关键词查询" OnClick="Button1_Click" /><asp:Repeater ID="Repeater1" runat="server" OnItemCommand="Repeater1_ItemCommand"><HeaderTemplate><table border="1px"><tr><th>ID</th><th>商品名</th><th>图片</th><th>价格</th><th>库存</th><th>小计</th><th>操作</th></tr></HeaderTemplate><ItemTemplate><tr><td><%#Eval("GoodsID") %></td><td><%#Eval("GoodsName") %></td><td><img height="50px" width="100px" src="Img/<%#Eval("GoodsPic")%>"/></td><td><%#Eval("GoodsPrice") %></td><td><%#Eval("GoodsStock") %></td><td><%#Eval("Xiaoji") %></td><td><a href="#">删除</a></td></tr></ItemTemplate><FooterTemplate></table></FooterTemplate></asp:Repeater><asp:Label ID="Label2" runat="server" Text="Label"></asp:Label></div></form>
</body>
</html>

10、ui表现层主界面后端部分

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;namespace WebApplication1
{public partial class WebForm1 : System.Web.UI.Page{protected void Page_Load(object sender, EventArgs e){if (!IsPostBack){Repeater1.DataSource=BLL.GoodsManger.ChaXun();Repeater1.DataBind();}}protected void Button1_Click(object sender, EventArgs e){Repeater1.DataSource = BLL.GoodsManger.MoCha(TextBox1.Text.ToString());Repeater1.DataBind();}protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e){}}
}