ASP.NET Web——GridView完整增删改查示例(全篇幅包含sql脚本)大二结业考试必备技能

Posted 2023-04-01 红目香薰

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ASP.NET Web——GridView

完整增删改查示例(全篇幅包含sql脚本)大二结业考试必备技能

环境说明

系统要求：win7/10/11

开发语言：C#

开发工具：Visual Studio 2012/2017/2019/2022，本示例使用的是Visual Studio 2017

项目创建：ASP.NET Web应用程序(.NET Framework)

数据库：SQLServer 2012/2014/2017/2019，本示例使用的是SQLServer 2014

数据库工具：Navicat

功能演示

ASP.NET Web增删改查演示(ASP.NET Web——GridView完整增删改查示例(全篇幅包含sql脚本)大二结业考试必备技能)

数据库脚本

建表语句

CREATE TABLE [dbo].[users] (
[id] varchar(32) COLLATE Chinese_PRC_CI_AS NOT NULL DEFAULT (replace(newid(),'-','')) ,
[createDate] datetime NOT NULL DEFAULT (getdate()) ,
[userName] varchar(20) COLLATE Chinese_PRC_CI_AS NOT NULL ,
[age] int NOT NULL ,
[introduce] varchar(200) COLLATE Chinese_PRC_CI_AS NOT NULL ,
CONSTRAINT [PK__users__3213E83F0E2177B8] PRIMARY KEY ([id])
)
ON [PRIMARY]
GO

信息插入

INSERT INTO [dbo].[users] ([id], [createDate], [userName], [age], [introduce]) VALUES (N'1a19c0945dfc44e98a715ffccdb1cc54', N'2223-08-08 18:18:22.000', N'superGirl777', N'17', N'超级女孩');
GO
INSERT INTO [dbo].[users] ([id], [createDate], [userName], [age], [introduce]) VALUES (N'1EBB75FB1DD64B678413894A4B736484', N'2222-08-08 18:18:22.000', N'貂蝉', N'16', N'吕布爱妻');
GO
INSERT INTO [dbo].[users] ([id], [createDate], [userName], [age], [introduce]) VALUES (N'7979e6d162c44ccbaf47fd3b0172ecf3', N'2222-01-01 01:01:01.000', N'周瑜', N'32', N'大都督');
GO
INSERT INTO [dbo].[users] ([id], [createDate], [userName], [age], [introduce]) VALUES (N'9BFE04E8999F415D9224CCFCEEF40927', N'2222-08-08 18:18:22.000', N'赵子龙', N'27', N'子龙浑身都是胆');
GO

创建ASP.NET Web项目

选择左侧菜单栏中的【Web】项目，右侧会弹出对应的ASP.NET Web应用程序(.NET Framework)

选择创建【Web窗体】

创建三层关系

创建类库并完成三层关系

三层关系

引入方式

注意层级引入顺序

完成DAL层DBHelper

注意换成自己的数据库连接

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;

namespace DAL

    public class DBHelper
    
        //数据库连接地址
        private static string url = "Data Source=.;Initial Catalog=test;Integrated Security=True";
        public static DataTable Query(string sql)
        
            SqlConnection conn = new SqlConnection(url);//创建链接
            SqlDataAdapter sdap = new SqlDataAdapter(sql,conn);//闭合式查询
            DataSet ds = new DataSet();//结果集
            sdap.Fill(ds);//将闭合式查询的结果放置到结果集中
            return ds.Tables[0];//返回结果集中的第一项
        
        public static bool NoQuery(string sql) 
            SqlConnection conn = new SqlConnection(url);//创建链接
            conn.Open();//打开数据库连接
            SqlCommand cmd = new SqlCommand(sql,conn);//声明操作
            int rows=cmd.ExecuteNonQuery();//执行操作
            conn.Close();//关闭数据库连接
            return rows > 0;//判断是否操作成功

完成DAL层UsersDAL.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DAL

    public class UsersDAL
    
        /// <summary>
        /// 查询所有
        /// </summary>
        /// <returns></returns>
        public static DataTable GetAll() 
            string sql = "select * from users";
            return DBHelper.Query(sql);
        
        /// <summary>
        /// 模糊查询
        /// </summary>
        /// <param name="userName"></param>
        /// <returns></returns>
        public static DataTable GetSelectByName(string userName)
        
            string sql = "select * from users where userName like '%" + userName + "%'";
            return DBHelper.Query(sql);
        
        /// <summary>
        /// 添加操作DAL
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="age"></param>
        /// <param name="introduce"></param>
        /// <returns></returns>
        public static bool AddInfo(string userName, int age, string introduce) 
            string id = Guid.NewGuid().ToString("N");
            string createDate = "2023-1-4 15:24:15";
            string sql = string.Format("insert into users values('0','1','2',3,'4')",
                id, createDate, userName, age, introduce);
            return DBHelper.NoQuery(sql);
        
        /// <summary>
        /// 删除语句
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public static bool DeleteById(string id) 
            string sql = "delete from users where id='" + id + "'";
            return DBHelper.NoQuery(sql);
        
        /// <summary>
        /// 根据id进行精准查询
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public static DataTable GetSelectById(string id)
        
            string sql = "select * from users where id='"+id+"'";
            return DBHelper.Query(sql);
        
        /// <summary>
        /// 修改
        /// </summary>
        /// <param name="id"></param>
        /// <param name="age"></param>
        /// <param name="introduce"></param>
        /// <returns></returns>
        public static bool UpdateById(string id,string age,string introduce) 
            string sql = string.Format("update users set age=0,introduce='1' where id='2'",
                age,introduce,id);
            return DBHelper.NoQuery(sql);

完成BLL层UsersBLL.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BLL

    public class UsersBLL
    
        public static DataTable GetAll()
        
            return DAL.UsersDAL.GetAll();
        
        public static DataTable GetSelectByName(string userName)
        
            return DAL.UsersDAL.GetSelectByName(userName);
        
        public static bool AddInfo(string userName, int age, string introduce)
        
            return DAL.UsersDAL.AddInfo(userName, age, introduce);
        
        public static bool DeleteById(string id)
        
            return DAL.UsersDAL.DeleteById(id);
        
        public static DataTable GetSelectById(string id)
        
            return DAL.UsersDAL.GetSelectById(id);
        
        public static bool UpdateById(string id, string age, string introduce)
        
            return DAL.UsersDAL.UpdateById(id,age,introduce);

完成视图层Index.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Index.aspx.cs" Inherits="Demo8.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>
    <link href="Content/bootstrap.css" rel="stylesheet" />
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <p>
                <asp:TextBox runat="server" ID="selectKey"></asp:TextBox>
                <asp:Button runat="server" Text="查询" OnClick="Unnamed_Click"/>
            </p>
            <a href="AddInfo.aspx" class="btn btn-primary">添加数据</a>
            <asp:GridView CssClass="table table-bordered table-hover" runat="server" ID="showList" AutoGenerateColumns="false" OnRowCommand="showList_RowCommand">
                <Columns>
                    <asp:BoundField DataField="id" HeaderText="编号"/>
                    <asp:BoundField DataField="createDate" HeaderText="创建时间"/>
                    <asp:BoundField DataField="userName" HeaderText="昵称"/>
                    <asp:BoundField DataField="age" HeaderText="年龄"/>
                    <asp:BoundField DataField="introduce" HeaderText="简介"/>
                    <asp:TemplateField>
                        <ItemTemplate>
<asp:LinkButton runat="server" CommandName="UpdateById" CommandArgument='<%# Eval("id") %>'
    CssClass="btn btn-primary">修改</asp:LinkButton>
<asp:LinkButton runat="server" CommandName="DeleteById" CommandArgument='<%# Eval("id") %>'
    OnClientClick="return confirm('是否删除此行?')" CssClass="btn btn-primary">删除</asp:LinkButton>
                        </ItemTemplate>
                    </asp:TemplateField>
                </Columns>
            </asp:GridView>
        </div>
    </form>
</body>
</html>

完成后台Index.aspx.cs

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

namespace Demo8

    public partial class Index : System.Web.UI.Page
    
        protected void Page_Load(object sender, EventArgs e)
        
            if (!IsPostBack)
            
                //绑定数据
                this.showList.DataSource = BLL.UsersBLL.GetAll();
                //显示数据
                this.showList.DataBind();
            
        

        protected void Unnamed_Click(object sender, EventArgs e)
        
            string selectKey = this.selectKey.Text;
            this.showList.DataSource = BLL.UsersBLL.GetSelectByName(selectKey);
            //显示数据
            this.showList.DataBind();
        

        protected void showList_RowCommand(object sender, GridViewCommandEventArgs e)
        
            if (e.CommandName == "DeleteById")
            
                BLL.UsersBLL.DeleteById(e.CommandArgument.ToString());
                Response.Redirect("Index.aspx");
             else if (e.CommandName == "UpdateById") 
                Response.Redirect("UpdateById.aspx?id="+e.CommandArgument.ToString());

完成视图层AddInfo.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AddInfo.aspx.cs" Inherits="Demo8.AddInfo" %>

<!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>
            <p>
                <asp:TextBox runat="server" ID="userName" placeholder="请输入昵称"></asp:TextBox>
            </p>
            <p>
                <asp:TextBox runat="server" ID="age" placeholder="请输入年龄"></asp:TextBox>
            </p>
            <p>
                <asp:TextBox runat="server" ID="introduce" placeholder="请输入简介"></asp:TextBox>
            </p>
            <p>
                <asp:Button runat="server" Text="添加" OnClick="Unnamed_Click"/>
            </p>
        </div>
    </form>
</body>
</html>

完成后台AddInfo.aspx.cs

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

namespace Demo8

    public partial class AddInfo : System.Web.UI.Page
    
        protected void Page_Load(object sender, EventArgs e)
        

        

        protected void Unnamed_Click(object sender, EventArgs e)
        
            string userName=this.userName.Text;
            int age=int.Parse(this.age.Text);
            string introduce = this.introduce.Text;
            if (string.IsNullOrEmpty(userName) || string.IsNullOrEmpty(this.age.Text)
                || string.IsNullOrEmpty(introduce)) 
                Response.Write("<script>alert('参数不允许有空存在!');</script>");
                return;
            
            bool isf=BLL.UsersBLL.AddInfo(userName,age,introduce);
            if (isf)
            
                Response.Redirect("Index.aspx");
            
            else 
                Response.Write("<script>alert('添加失败!');</script>");

完成视图层UpdateById.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="UpdateById.aspx.cs" Inherits="Demo8.UpdateById" %>

<!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>
            <p>
                <asp:TextBox runat="server" ID="id" ReadOnly="true"></asp:TextBox>
            </p>
            <p>
                <asp:TextBox runat="server" ID="age"></asp:TextBox>
            </p>
            <p>
                <asp:TextBox runat="server" ID="introduce"></asp:TextBox>
            </p>
            <p>
                <asp:Button runat="server" Text="提交修改" OnClick="Unnamed_Click"/>
            </p>
        </div>
    </form>
</body>
</html>

完成后台UpdateById.aspx.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace Demo8

    public partial class UpdateById : System.Web.UI.Page
    
        protected void Page_Load(object sender, EventArgs e)
        
            if (!IsPostBack) 
                string id = Request.QueryString["id"];
                DataTable dt = BLL.UsersBLL.GetSelectById(id);
                this.id.Text = dt.Rows[0]["id"].ToString();
                this.age.Text = dt.Rows[0]["age"].ToString();
                this.introduce.Text = dt.Rows[0]["introduce"].ToString();
            
        

        protected void Unnamed_Click(object sender, EventArgs e)
        
            string id=this.id.Text;
            string age = this.age.Text;
            string introduce = this.introduce.Text;
            if (
                string.IsNullOrEmpty(id)||
                string.IsNullOrEmpty(age)||
                string.IsNullOrEmpty(introduce)
                ) 
                Response.Write("<script>alert('参数不允许为空!');<script>");
                return;
            
            BLL.UsersBLL.UpdateById(id,age,introduce);
            Response.Redirect("Index.aspx");

最终执行效果：

项目源码地址：

ASP.NETWeb-GridView完整增删改查示例项目源码-大二结业考试必备技能-C#文档类资源-CSDN下载

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