演示功能：
点击启动生成页面
点击搜索模糊查询
点击添加跳转新界面
此处设置文本框多行
点击Button添加
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
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=CarDB;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 temp= cmd.ExecuteNonQuery();
return temp > 0;
}
public static SqlDataReader Reader(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 DalService
{
public static List<Models.ModelsCarInfo> Query()
{
string cha = "select * from CarInfo";
List<Models.ModelsCarInfo> list = new List<Models.ModelsCarInfo>();
SqlDataReader read= DBHelper.Reader(cha);
while (read.Read())
{
Models.ModelsCarInfo model = new Models.ModelsCarInfo();
model.InfoID = read["InfoID"].ToString();
model.InfoPic = read["InfoPic"].ToString();
model.InfoTitle = read["InfoTitle"].ToString();
model.PubTime = read["PubTime"].ToString();
model.CarPrice = read["CarPrice"].ToString();
list.Add(model);
} ;
return list;
}
public static bool Tianjia(string title,string price) {
string sql = string.Format("insert CarInfo values('{0}','Desert.jpg',{1},GETDATE())",title,price);
if ( DBHelper.NoQuery(sql))
{
return true;
}
else
{
return false;
};
}
public static List<Models.ModelsCarInfo> Sou(string title)
{
string cha = string.Format("select * from CarInfo where InfoTitle like '%{0}%'", title);
List<Models.ModelsCarInfo> list = new List<Models.ModelsCarInfo>();
SqlDataReader read = DBHelper.Reader(cha);
while (read.Read())
{
Models.ModelsCarInfo model = new Models.ModelsCarInfo();
model.InfoID = read["InfoID"].ToString();
model.InfoPic = read["InfoPic"].ToString();
model.InfoTitle = read["InfoTitle"].ToString();
model.PubTime = read["PubTime"].ToString();
model.CarPrice = read["CarPrice"].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 BLLManager
{
public static List<Models.ModelsCarInfo> Query() {
return DAL.DalService.Query();
}
public static bool Tianjia(string title, string price) {
return DAL.DalService.Tianjia(title, price);
}
public static List<Models.ModelsCarInfo> Sou(string title) {
return DAL.DalService.Sou(title);
}
}
}
7、ui表现层主界面前端部分
8、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 Index
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
List<Models.ModelsCarInfo> list = BLL.BLLManager.Query();
this.Repeater1.DataSource = list;
this.Repeater1.DataBind();
Label2.Text = list.Count.ToString();
}
}
protected void Button1_Click(object sender, EventArgs e)
{
List<Models.ModelsCarInfo> list = BLL.BLLManager.Sou(TextBox1.Text.ToString());
this.Repeater1.DataSource = list;
this.Repeater1.DataBind();
}
}
}9、ui表现层添加界面前端部分
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Tianjia.aspx.cs" Inherits="Index.Tianjia" %>
<!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>
<a href="WebForm1.aspx">返回</a>
<br /> <asp:Label ID="Label1" runat="server" Text=" 标题"></asp:Label><asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="标题不能为空" ControlToValidate="TextBox1"></asp:RequiredFieldValidator>
<br /> <asp:Label ID="Label2" runat="server" Text="价格"></asp:Label><asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="价格不能为空" ControlToValidate="TextBox2"></asp:RequiredFieldValidator>
<br /> <asp:Button ID="Button1" runat="server" Text="添加" OnClick="Button1_Click" />
</div>
</form>
</body>
</html>
10、ui表现层添加界面后端部分
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Index
{
public partial class Tianjia : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
UnobtrusiveValidationMode = UnobtrusiveValidationMode.None;
}
protected void Button1_Click(object sender, EventArgs e)
{
if (BLL.BLLManager.Tianjia(TextBox1.Text.ToString(), TextBox2.Text.ToString()))
{
ClientScript.RegisterStartupScript(this.GetType(), "success", "alert('成功了！');location.href='WebForm1.aspx'", true);
}
else
{
ClientScript.RegisterStartupScript(this.GetType(), "fail", "alert('失败！');", true);
};
}
}
}