ASP.Net实现海鲜添加(三层架构，异常处理)

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);

            };
       
        
        }
    }
}