ASP.NET中使用Entity Framework开发增删改查的Demo（EF增删改查+母版页的使用）

这里更多的是当作随身笔记使用，记录一下学到的知识，以便淡忘的时候能快速回顾

这里是该项目的第二部分，

第一部分
第二部分（当前部分）
大完结版本

此Demo是新建了一个音乐类型的web，然后使用母版页套取格式，对音乐类型进行新建，编辑，删除，和查询的操作

首先创建一个母版页
在这里插入图片描述

样式自己调试就好，这里就不附样式代码了
这个母版页没有后台代码

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="AdminSite.master.cs" Inherits="WebApplication1.Admin.AdminSite" %>

<!DOCTYPE html>

<html>
<head runat="server">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <asp:ContentPlaceHolder ID="head" runat="server">
    </asp:ContentPlaceHolder>
    <link href="../Assets/css/animate.min.css" rel="stylesheet" />
    <link href="../Assets/css/font-awesome.css" rel="stylesheet" />
    <link href="../Assets/css/font-awesome.min.css" rel="stylesheet" />
    <link href="../Assets/css/grids-responsive-min.css" rel="stylesheet" />
    <link href="../Assets/css/input.css" rel="stylesheet" />
    <link href="../Assets/css/login.css" rel="stylesheet" />
    <link href="../Assets/css/main.css" rel="stylesheet" />
    <link href="../Assets/css/pure-extends.css" rel="stylesheet" />
    <link href="../Assets/css/pure-min.css" rel="stylesheet" />
    <link href="../Assets/css/shop.css" rel="stylesheet" />

</head>
<body>
    <form id="form1" runat="server">
        <div id="m-header">
            <div class=" home-menu pure-menu pure-menu-horizontal">
                <a href="#" class="pure-menu-heading pure-menu-link">在线音乐商店-后台管理</a>
                <ul class="pure-menu-list">
                    <li class="pure-menu-item pure-menu-has-children pure-menu-allow-hover">
                        <a href="#" class="pure-menu-link">
                            <i class="fa fa-user-circle"></i>
                            <asp:Label ID="lbUser" runat="server" Text="管理员"></asp:Label>
                        </a>
                        <ul class="pure-menu-children">
                            <li class="pure-menu-item pure-menu-allow-hover">
                                <asp:LinkButton ID="lbExit" CssClass="pure-button pure-button-primary" runat="server">注销</asp:LinkButton>
                            </li>
                        </ul>
                    </li>
                </ul>
            </div>

        </div>
        <div id="m-body" class="pure-g">
            <div id="nav" class=" pure-u-1-4">
                <div id="nav-item" class="pure-menu custom-restricted-width">
                     

                    <ul class="pure-menu-list">
                        <li class="pure-menu-item"><a href="MusicManager.aspx" class="pure-menu-link">音乐管理</a></li>
                        <li class="pure-menu-item"><a href="MusicType.aspx" class="pure-menu-link">类型管理</a></li>
                        <li class="pure-menu-item"><a href="OrdersManager.aspx" class="pure-menu-link">订单管理</a></li>
                        <li class="pure-menu-item"><a href="RoleManager" class="pure-menu-link">角色管理</a></li>
                        <li class="pure-menu-item"><a href="UserManager" class="pure-menu-link">用户管理</a></li>
                        </ul>
                </div>
            </div>
            <div id="main" class=" pure-u-3-4">
                <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
                </asp:ContentPlaceHolder>
            </div>
        </div>
         <script src="../Assets/js/jquery-3.4.1.min.js"></script> 
        <script>
            $(function () {
                $("#nav-item a").each(function () {
                    var index = window.location.href.indexOf($(this).attr("href"));
                    if (index != -1) {
                        $(this).addClass("pure-menu-selected");
                    } else {
                        $(this).removeClass("pure-menu-selected");
                    }
                })
            })
        </script>
    </form>
   
</body>
</html>

然后是音乐类型显示的页面

<%@ Page Title="" Language="C#" MasterPageFile="~/Admin/AdminSite.Master" AutoEventWireup="true" CodeBehind="MusicType.aspx.cs" Inherits="WebApplication1.Admin.MusicManager" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
    <link href="../Assets/css/input.css" rel="stylesheet" />
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
    <div class="pure-form">
        <fieldset>
            <%--genres表--%>
            <legend>后台管理<i class="fa fa-angle-double-right"></i>类型管理
                <asp:Button ID="Button1" runat="server" CssClass="button-default pure-button-primary tools-button" Text="添加音乐类型" OnClick="Button1_Click" />
            </legend>
        </fieldset>
    </div>
    <table class="pure-table">
        <thead>
            <tr>
                <th>#</th>
                <th>Make</th>
                <th>Model</th>
                <th>Year</th>
            </tr>
        </thead>
        <tbody>
            <asp:Repeater ID="Repeater1" runat="server" OnItemCommand="Repeater1_ItemCommand">
                <ItemTemplate> 
                   <tr>
                            <th scope="col"><%# Eval("GenreId") %></th>
                            <td><%# Eval("Name") %></td>
                            <td><%# Eval("Description").ToString().Length>30?Eval("Description").ToString().Substring(0,30)+"...":Eval("Description") %>...</td>
                            <td>
                                <asp:LinkButton ID="LinkButton1" CssClass="button-default pure-button-primary" runat="server"  CommandArgument='<%#Eval("GenreId") %>'  CommandName="Edit">编辑</asp:LinkButton>
                                <asp:LinkButton ID="LinkButton2" CssClass="button-default  button-error" runat="server"     CommandArgument='<%#Eval("GenreId") %>'  CommandName="Delete">删除</asp:LinkButton></td>
                         
                    </tr>
                </ItemTemplate>
            </asp:Repeater>
        </tbody>
    </table>
</asp:Content>

音乐类型显示页面的后台代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using WebApplication1.DAL;

using WebApplication1.BLL;

namespace WebApplication1.Admin
{
    public partial class MusicManager : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            using (OLMSDBEntities oLMSDB = new OLMSDBEntities())
            {
                Repeater1.DataSource = oLMSDB.Genres.ToList();
                Repeater1.DataBind();
            }
        }

        protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e)
        {

            string str = e.CommandName.ToString();
            //这里获取id，我的id是刚才我赋值的时候CommandArgument是赋值的id
            int id = Convert.ToInt32(e.CommandArgument.ToString());
            //using (OLMSDBEntities oLMSDB = new OLMSDBEntities())
            //{


               // var gener = oLMSDB.Genres.FirstOrDefault(t => t.GenreId == id);
                if (str == "Delete")
                {

                    //后面是对数据库的操作，可以忽略
                    //    oLMSDB.Genres.Remove(gener);
                    bool flag_deleteMussicType = MusicType.deleteMusicType(id);
                    if (flag_deleteMussicType)
                    {
                        string strUrl = "<script>alert('删除成功');window.location.href='MusicType.aspx'</script>";
                        Response.Write(strUrl);
                    }
                    else
                    {
                        string strUrl = "<script>alert('删除失败');</script>";
                        Response.Write(strUrl);
                    }
                }
                else if (str == "Edit")
                {
                    Response.Redirect($"Edit_MusicType.aspx?id={id}");

                }
            //}
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            Response.Redirect("Add_MusicType.aspx");
        }
    }
}

然后是添加音乐类型的界面

<%@ Page Title="" Language="C#" MasterPageFile="~/Admin/AdminSite.Master" AutoEventWireup="true" CodeBehind="Add_MusicType.aspx.cs" Inherits="WebApplication1.Admin.Add_MusicType" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
     <div class="pure-form">
        <fieldset>
            <legend>类型管理&nbsp;&nbsp;<i class="fa fa-angle-double-right"></i>&nbsp;&nbsp;类型信息
                <asp:Button ID="Button2" runat="server" Text="返回" CssClass="pure-button tools-button" OnClick="Button2_Click" />
                <asp:Button ID="Button1" runat="server" Text="保存" CssClass="pure-button pure-button-primary tools-button" OnClick="Button1_Click" />
            </legend>
        </fieldset>
        <div class="pure-g">
            <div class="pure-u-2-3">
                <asp:Label ID="Label1" runat="server" Text="音乐名称"></asp:Label>
                <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
            </div>
            <div class="pure-u-2-3">
                   <asp:Label ID="Label2" runat="server" Text="音乐描述"></asp:Label>
                <asp:TextBox ID="TextBox2" runat="server" TextMode="MultiLine"></asp:TextBox>
            </div>
        </div>
     </div>
</asp:Content>

添加音乐类型界面的后台代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using WebApplication1.BLL;
using WebApplication1.DAL;

namespace WebApplication1.Admin
{
    public partial class Add_MusicType : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            string music_Name = TextBox1.Text;
            string music_Detail = TextBox2.Text;

           bool flag =  MusicType.addMusicType(music_Name, music_Detail);
            if (flag)
            {
                string strUrl = "<script>alert('添加成功');window.location.href='MusicType.aspx'</script>";
                        Response.Write(strUrl);
            }
            else
            {
                string strUrl = "<script>alert('添加失败');</script>";
                        Response.Write(strUrl);
            }

            //using (OLMSDBEntities oLMSDB = new OLMSDBEntities())
            //{

            //    oLMSDB.Genres.Add(new Genres
            //    {
            //        Name = music_Name,
            //        Description = music_Detail
            //    });
            //    if (oLMSDB.SaveChanges() > 0)
            //    {
            //        string strUrl = "<script>alert('添加成功');window.location.href='MusicType.aspx'</script>";
            //        Response.Write(strUrl);
            //    }
            //    else
            //    {
            //        string strUrl = "<script>alert('添加失败');</script>";
            //        Response.Write(strUrl);
            //    }
            //}
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            string strUrl = "window.location.href='MusicType.aspx'</script>";
            Response.Write(strUrl);
        }
    }
}

编辑音乐类型界面的代码

<%@ Page Title="" Language="C#" MasterPageFile="~/Admin/AdminSite.Master" AutoEventWireup="true" CodeBehind="Edit_MusicType.aspx.cs" Inherits="WebApplication1.Admin.Edit_MusicType" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
    <div class="pure-form">
        <fieldset>
            <legend>类型管理&nbsp;&nbsp;<i class="fa fa-angle-double-right"></i>&nbsp;&nbsp;类型信息
                <asp:Button ID="Button2" runat="server" Text="返回" CssClass="pure-button tools-button" OnClick="Button2_Click" />
                <asp:Button ID="Button1" runat="server" Text="保存" CssClass="pure-button pure-button-primary tools-button" OnClick="Button1_Click" />
            </legend>
        </fieldset>
        <div class="pure-g">
            <div class="pure-u-2-3">
                <asp:Label ID="Label1" runat="server" Text="音乐名称"></asp:Label>
                <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
            </div>
            <div class="pure-u-2-3">
                   <asp:Label ID="Label2" runat="server" Text="音乐描述"></asp:Label>
                <asp:TextBox ID="TextBox2" runat="server" TextMode="MultiLine"></asp:TextBox>
            </div>
        </div>
     </div>

</asp:Content>

编辑音乐类型界面的后台代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using WebApplication1.BLL;
using WebApplication1.DAL;

namespace WebApplication1.Admin
{
    public partial class Edit_MusicType : System.Web.UI.Page
    {
        Genres data;
        protected void Page_Load(object sender, EventArgs e)
        {
           
            int id = Convert.ToInt32(Request.QueryString["id"]);
            OLMSDBEntities oLMSDB = new OLMSDBEntities();
            if (!IsPostBack)
            {

           
              data = oLMSDB.Genres.FirstOrDefault(t => t.GenreId == id);
            TextBox1.Text = data.Name;
            TextBox2.Text = data.Description;
            }
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            string strUrl = "window.location.href='MusicType.aspx'</script>";
            Response.Write(strUrl);
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
     //       using (OLMSDBEntities oLMSDB = new OLMSDBEntities())
       //     {
                string music_Name = TextBox1.Text;
                string music_Detail = TextBox2.Text;
                int id = Convert.ToInt32(Request.QueryString["id"]);
            //var genres = oLMSDB.Genres.FirstOrDefault(t => t.GenreId == id);
            //genres.Name = TextBox1.Text;
            //genres.Description = TextBox2.Text;
            bool updateMusicType = MusicType.updateMusicType(id, music_Name, music_Detail);
                if (updateMusicType)
                {
                    string strUrl = "<script>alert('修改成功');window.location.href='MusicType.aspx'</script>";
                    Response.Write(strUrl);
                }
                else
                {
                    string strUrl = "<script>alert('修改失败');</script>";
                    Response.Write(strUrl);
                }
         //   }
        }
    }
}

然后我的音乐类型增删改查的具体实现方法写在BLL里面了

下面是增删改查的代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using WebApplication1.DAL;

namespace WebApplication1.BLL
{
    public class MusicType
    {
        public static bool addMusicType(string name, string detail)
        {
            using (OLMSDBEntities oLMSDB = new OLMSDBEntities())
            {

                oLMSDB.Genres.Add(new Genres
                {
                    Name = name,
                    Description = detail
                });
                if (oLMSDB.SaveChanges() > 0)
                {
                    return true;
                }
                else
                { 
                    return false;
                }
            }
          
        }

        public static bool deleteMusicType(int id)
        {
            using (OLMSDBEntities oLMSDB = new OLMSDBEntities())
            {
                var gener = oLMSDB.Genres.FirstOrDefault(t => t.GenreId == id);
                oLMSDB.Genres.Remove(gener);
                return oLMSDB.SaveChanges() > 0;
            }

        }

        public static bool updateMusicType(int id, string name, string detail)
        {
            using (OLMSDBEntities oLMSDB = new OLMSDBEntities())
            {
                var genres = oLMSDB.Genres.FirstOrDefault(t => t.GenreId == id);
                genres.Name = name;
                genres.Description = detail;
                return oLMSDB.SaveChanges() > 0;
            }
        }
    }
}

完成效果图如下

首先是主界面，开始添加音乐类型

在这里插入图片描述
输入之后点击确定
在这里插入图片描述
提示添加成功，然后就可以返回主界面了
在这里插入图片描述

主界面已经有了刚才添加的数据

在这里插入图片描述

然后开始编辑

在这里插入图片描述

修改之后，点击保存

在这里插入图片描述

提示修改成功后，返回主界面，下面是修改后的

在这里插入图片描述
下面是删除的效果图

在这里插入图片描述

提示删除成功之后，就删除了，下面是效果图
在这里插入图片描述

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原文地址：https://www.cnblogs.com/a1439775520/p/12946063.html