ASP.Net实现新闻添加查询(三层架构，含照片)

2023-12-27 19:49:08

演示功能：

点击启动生成页面

?点击搜索模糊查询

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

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

建照片文件夹用于展示图片，数据库存地址?

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 NewsModels
    {
        private string newsID;

        public string NewsID
        {
            get { return newsID; }
            set { newsID = value; }
        }
        private string newsTitle;

        public string NewsTitle
        {
            get { return newsTitle; }
            set { newsTitle = value; }
        }
        private string newsContent;

        public string NewsContent
        {
            get { return newsContent; }
            set { newsContent = value; }
        }
        private string type;

        public string Type
        {
            get { return type; }
            set { type = value; }
        }
        private string publisher;

        public string Publisher
        {
            get { return publisher; }
            set { publisher = value; }
        }
        private string pian;

        public string Pian
        {
            get { return pian; }
            set { pian = value; }
        }
        private string pubTime;

        public string PubTime
        {
            get { return pubTime; }
            set { pubTime = 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=NewsDB;uid=sa;pwd=123123";
        public static SqlConnection conn = null;
        public static void Conncet() {
            if (conn==null)
            {
                conn=new SqlConnection(connstr);
            }
            conn.Close();
            conn.Open();
        }
        public static bool NoQuery(string sql) {
            Conncet();
            SqlCommand cmd = new SqlCommand(sql,conn);
          int temp=  cmd.ExecuteNonQuery();
          conn.Close();
          return temp > 0;

        }
        public static SqlDataReader Reader(string sql) {
            Conncet();
            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.NewsModels> Zhanshi() {
          List<Models.NewsModels> list = new List<Models.NewsModels>();
          string sql = "select * from News";
      SqlDataReader read=    DBHelper.Reader(sql);
      while (read.Read())
	{
	         Models.NewsModels model=new Models.NewsModels();
             model.NewsID = read["NewsID"].ToString();
             model.NewsTitle = read["NewsTitle"].ToString();
             model.Pian = read["Pian"].ToString();
             model.Publisher = read["Publisher"].ToString();
             model.Type = read["Type"].ToString();
             model.PubTime = read["PubTime"].ToString();
             model.NewsContent = read["NewsContent"].ToString();
             list.Add(model);
	}  
            
          return list;
      
      }
      public static List<Models.NewsModels>  Cha(string title)
      {
          List<Models.NewsModels> list = new List<Models.NewsModels>();
          string sql = string.Format("select * from News where NewsTitle like '%{0}%'",title);
          SqlDataReader read = DBHelper.Reader(sql);
          while (read.Read())
          {
              Models.NewsModels model = new Models.NewsModels();
              model.NewsID = read["NewsID"].ToString();
              model.NewsTitle = read["NewsTitle"].ToString();
              model.Pian = read["Pian"].ToString();
              model.Publisher = read["Publisher"].ToString();
              model.Type = read["Type"].ToString();
              model.PubTime = read["PubTime"].ToString();
              model.NewsContent = read["NewsContent"].ToString();
              list.Add(model);
          }

          return list;

      }
      public static bool  Jia(string title,string content,string type,string publisher){
            string sql=string.Format("insert News values('{0}','{1}','{2}','{3}','Jellyfish.jpg',GETDATE())",title,content,type,publisher);
            if (DBHelper.NoQuery(sql))
            {
                return true;
            }
            else
            {
                return false;
            }
      }
    }
}

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.NewsModels> Zhanshi() {
           return DAL.DalService.Zhanshi(); 
       }
       public static bool Jia(string title, string content, string type, string publisher) {
           return DAL.DalService.Jia(title,content,type,publisher);
       }
       public static List<Models.NewsModels> Cha(string title) {
           return DAL.DalService.Cha(title);
       }
    }
}

7、ui表现层主界面前端部分

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Index.aspx.cs" Inherits="Index.Index" %>

<!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">添加新闻</a>
            <br />    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><asp:Button ID="Button1" runat="server" Text="查询" OnClick="Button1_Click" />
        <asp:Repeater ID="Repeater1" runat="server" OnItemCommand="Repeater1_ItemCommand">
            <HeaderTemplate>
               
                <table border="1" >
                    <tr>
                         <th>
                             新闻ID
                         </th>
                         <th>
                             新闻标题	
                         </th> <th>
                            新闻内容	
                         </th> 
                        <th>
                            新闻照片
                         </th><th>
                             新闻类型	
                         </th> <th>
                            发布人
                         </th> <th>
                            发布时间
                         </th>
                    
                    </tr>
                   
            </HeaderTemplate>
            <ItemTemplate>
                <tr>
                    <td >
                        <%#Eval("NewsID") %>
                    </td>
                    <td >
                        <%#Eval("NewsTitle") %>                      
                    </td>
                    <td >                     
                        <%#Eval("NewsContent") %>                     
                    </td>
                    <td >                        
                        <img src="Img/<%#Eval("Pian") %>" height="50px" width="50px"/>                      
                    </td>
                    <td>
                        <%#Eval("Type") %>  
                    </td>
                    <td >                      
                        <%#Eval("Publisher") %>                       
                    </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 Index
{
    public partial class Index : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                List<Models.NewsModels> list = BLL.BllManager.Zhanshi();
                Repeater1.DataSource = list;
                Repeater1.DataBind();
            }
          

        }

        protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {

            List<Models.NewsModels> list = BLL.BllManager.Cha(TextBox1.Text.ToString());
            Repeater1.DataSource = list;
            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="Index.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="内容"></asp:Label><asp:TextBox Height="100px" ID="TextBox2" runat="server" TextMode="MultiLine"></asp:TextBox><asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="内容不能为空" ControlToValidate="TextBox2"></asp:RequiredFieldValidator>
     <br />     <asp:Label ID="Label3" runat="server" Text="类型"></asp:Label><asp:TextBox ID="TextBox3" runat="server"></asp:TextBox><asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ErrorMessage="类型不能为空" ControlToValidate="TextBox3"></asp:RequiredFieldValidator>
     <br />     <asp:Label ID="Label4" runat="server" Text="发布人"></asp:Label><asp:TextBox ID="TextBox4" runat="server"></asp:TextBox><asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ErrorMessage="发布人不能为空" 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 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.Jia(TextBox1.Text.ToString(), TextBox2.Text.ToString(), TextBox3.Text.ToString(), TextBox4.Text.ToString()))
            {
                ClientScript.RegisterStartupScript(this.GetType(), "success", "alert('成功添加');location.href='Index.aspx'",true);
            }
            else
            {
                ClientScript.RegisterStartupScript(this.GetType(), "fail", "alert('失败');", true);

            };
        }
    }
}

文章来源:https://blog.csdn.net/Mr_wangzu/article/details/135252893
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