本文主要是介绍ASP.Net实现海鲜添加(三层架构，异常处理)，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
演示功能：
点击启动生成页面
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
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;namespace Models {public class SeaFoodTypeModel{private string infoTitle;private string infoID;public string InfoID{get { return infoID; }set { infoID = value; }}private string pubTime;public string PubTime{get { return pubTime; }set { pubTime = value; }}public string InfoTitle {get { return infoTitle; }set { infoTitle = value; } }private string infoPic;public string InfoPic {get { return infoPic; }set { infoPic = value; } }private string type;public string Type {get { return type; }set { type = value; } }private string infoDetail;public string InfoDetail {get { return infoDetail; }set { infoDetail = value; } } private string price;public string Price {get { return price; }set { price = 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=SeaFoodDB;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) {try{Connect();SqlCommand cmd = new SqlCommand(sql,conn);int temp= cmd.ExecuteNonQuery();conn.Close();return temp > 0;}catch (Exception ex){return false; }}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.SeaFoodTypeModel> Zhanshi() {List<Models.SeaFoodTypeModel> list = new List<Models.SeaFoodTypeModel>();string sql = "select * from SeaFoodInfo";SqlDataReader read= Dal.DBHelper.Reader(sql);while (read.Read()){Models.SeaFoodTypeModel model = new Models.SeaFoodTypeModel();model.InfoID = read["InfoID"].ToString();model.PubTime = read["PubTime"].ToString();model.Type = read["Type"].ToString();model.Price = read["Price"].ToString();model.InfoPic = read["InfoPic"].ToString();model.InfoTitle = read["InfoTitle"].ToString();model.InfoDetail = read["InfoDetail"].ToString();list.Add(model);}return list;}public static bool Tianjia(string InfoTitle, string TypeName, string InfoDetail, string Price){string sql = string.Format("insert SeaFoodInfo values('{0}', 'yu.jpg', '{1}', '{2}', '{3}', GETDATE())", InfoTitle, TypeName, InfoDetail, Price);return DBHelper.NoQuery(sql);}}
}
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.SeaFoodTypeModel> Zhanshi() {return Dal.DalService.Zhanshi();}public static bool Tianjia(string InfoTitle, string TypeName, string InfoDetail, string Price){return Dal.DalService.Tianjia( InfoTitle, TypeName, InfoDetail, Price);}}
}
7、ui表现层主界面前端部分
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication2.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><a href="Tianjia.aspx">添加海鲜</a><asp:Repeater ID="Repeater1" runat="server"><HeaderTemplate><table border="1"><tr><th>信息编号</th><th>信息标题</th><th>信息图片</th><th>海鲜类型</th><th>信息详情</th><th>价格</th><th>发布时间</th></tr></HeaderTemplate><ItemTemplate><tr><td><%#Eval("InfoID") %></td><td><%#Eval("InfoTitle") %></td><td><img src="Images/<%#Eval("InfoPic") %>" width="60px" height="50px"/></td><td><%#Eval("Type") %></td><td><%#Eval("InfoDetail") %></td><td><%#Eval("Price") %></td><td><%#Eval("PubTime") %></td></tr></ItemTemplate><FooterTemplate></table></FooterTemplate></asp:Repeater></div></form> </body> </html>
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 WebApplication2
{public partial class WebForm1 : System.Web.UI.Page{protected void Page_Load(object sender, EventArgs e){this.Repeater1.DataSource = Bll.BllManager.Zhanshi();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="WebApplication2.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="信息标题"></asp:Label><asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="信息标题不能为空" ControlToValidate="TextBox1"></asp:RequiredFieldValidator><br /> <asp:Label ID="Label2" runat="server" Text="海鲜类型"></asp:Label><asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="海鲜类型不能为空" ControlToValidate="TextBox2"></asp:RequiredFieldValidator><br /> <asp:Label ID="Label3" runat="server" Text="信息详情"></asp:Label><asp:TextBox ID="TextBox3" runat="server"></asp:TextBox><asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ErrorMessage="信息详情不能为空" ControlToValidate="TextBox3"></asp:RequiredFieldValidator><br /> <asp:Label ID="Label4" runat="server" Text="价格"></asp:Label><asp:TextBox ID="TextBox4" runat="server" style="margin-left: 31px"></asp:TextBox><asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ErrorMessage="价格" ControlToValidate="TextBox4"></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 WebApplication2
{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(), TextBox3.Text.ToString(), TextBox4.Text.ToString())){ClientScript.RegisterStartupScript(GetType(),"success", "alert('正确！');location.href='WebForm1.aspx'",true);}else{ClientScript.RegisterStartupScript(GetType(), "success", "alert('错误！')", true);};}}
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