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Winform操作Access数据库增删改操作学习笔记

此程序是本人学习Winform操作Access数据库时学习笔记。

程序源码来源于:《Visual C# 2008 程序开发入门与提高 》赵增敏 编著

操作方法:

1.新建一个Winform项目,并将该项目设置为启动项目;

2.复制数据库文件到程序根目录下。

3.添加3个Label、两个TextBox、一个ListBox,四个Button控件。

4.窗体底部Label修改名称为“labelMsg”,两个文本框修改名称为:textboxSurname,textboxName。

5.列表框命名为ListBoxEmployee,四个按钮修改名称为:buttonNew、buttonMdodify、buttonDelete、buttonExit.

6.设置窗体、标签、文本框、按钮的Text属性。

程序截图:

源码如下:

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Data.OleDb;namespace ACCESS增删改操作源码{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private OleDbConnection conn;        private OleDbDataAdapter da;        private DataSet ds;        //以下方法用于填充列表框        private void ListBoxFill()        {            if (this.ds.Tables[0].Rows != null) this.ds.Tables[0].Rows.Clear();            this.listBoxEmployee.DataSource = null;            this.listBoxEmployee.Items.Clear();            this.da.Fill(ds, "雇员");            this.listBoxEmployee.DataSource = ds.Tables["雇员"];            this.listBoxEmployee.DisplayMember = "姓名";            this.listBoxEmployee.ValueMember = "雇员ID";        }        //加载窗体时执行以下事件处理程序        private void Form1_Load(object sender, EventArgs e)        {            string NorthwindConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Northwind.mdb;";            string quueryString = "select 雇员ID,姓氏,名字,姓氏+名字 AS 姓名 from 雇员";            this.conn = new OleDbConnection(NorthwindConnectionString);            this.ds = new DataSet();            this.ds.Tables.Add("雇员");            this.da = new OleDbDataAdapter(quueryString, conn);            //对数据适配器设置插入命令,insert 语句中包含的问号表示查询参数            this.da.InsertCommand = new OleDbCommand("insert into 雇员(姓氏,名字)values(?,?)", conn);            this.da.InsertCommand.Parameters.AddWithValue("姓氏", "");            this.da.InsertCommand.Parameters.AddWithValue("名字", "");            //对数据适配器设置更新命令,update 语句中包含的问号表示查询参数            this.da.UpdateCommand = new OleDbCommand("update 雇员 set 姓氏=?,名字=? where 雇员ID=?", conn);            this.da.UpdateCommand.Parameters.AddWithValue("姓氏", "");            this.da.UpdateCommand.Parameters.AddWithValue("名字", "");            this.da.UpdateCommand.Parameters.AddWithValue("雇员ID", -1);            //对数据适配器设置删除命令,delete 语句中包含的问号表示查询参数            this.da.DeleteCommand = new OleDbCommand("delete * from 雇员 where 雇员ID=?", conn);            this.da.DeleteCommand.Parameters.AddWithValue("ID", -1);            //用雇员姓名信息填充列表框            this.ListBoxFill();        }        //当单击"新增"按钮时执行以下事件处理程序        private void buttonNew_Click(object sender, EventArgs e)        {            if (this.textBoxSurName.Text == "" || this.textBoxName.Text == "")            {                this.labelMsg.Text = "姓氏和名字不能为空";                return;            }            //通过parameter对象向insert 语句传递参数            this.da.InsertCommand.Parameters["姓氏"].Value = http://www.mamicode.com/this.textBoxSurName.Text;            this.da.InsertCommand.Parameters["名字"].Value = http://www.mamicode.com/this.textBoxName.Text;            DataRow dr = this.ds.Tables[0].NewRow();         //在数据表中新增一行            dr["姓氏"] = this.textBoxSurName.Text;              //为该行的姓氏列设置值            dr["名字"] = this.textBoxName.Text;              //为该行的名字列设置值            this.ds.Tables[0].Rows.Add(dr);                  //将该行添加到数据表的行集合中。            this.da.Update(this.ds, "雇员");                 //将更新保存到数据库表中。            this.ListBoxFill();                              //再次填充列表框            this.listBoxEmployee.SelectedIndex = this.listBoxEmployee.Items.Count - 1;            this.labelMsg.Text = "新纪录添加成功";            this.textBoxSurName.Text = "";            this.textBoxName.Text = "";            this.textBoxSurName.Focus();        }        //当单击"更改"按钮时执行一下处理程序        private void buttonModify_Click_1(object sender, EventArgs e)        {            int selectedIndex = this.listBoxEmployee.SelectedIndex;            //通过 parameter 对象向 update 语句传递参数            this.da.UpdateCommand.Parameters["雇员ID"].Value = http://www.mamicode.com/this.listBoxEmployee.SelectedValue;"姓氏"].Value = http://www.mamicode.com/this.textBoxSurName.Text;"名字"].Value = http://www.mamicode.com/this.textBoxName.Text;"雇员"].Select("雇员ID=" + this.listBoxEmployee.SelectedValue)[0];            dr["姓氏"] = this.textBoxSurName.Text;            dr["名字"] = this.textBoxName.Text;            this.da.Update(this.ds, "雇员");            this.ListBoxFill();            this.listBoxEmployee.SelectedIndex = selectedIndex;            this.labelMsg.Text = "选定的记录已经被更新";        }        //当单击"删除"按钮时执行以下事件处理程序        private void buttonDelete_Click_1(object sender, EventArgs e)        {            //通过parameter 对象向 delete 语句传递参数            this.da.DeleteCommand.Parameters["ID"].Value = http://www.mamicode.com/this.listBoxEmployee.SelectedValue;"雇员ID=" + this.listBoxEmployee.SelectedValue)[0];            dr.Delete();            this.da.Update(this.ds, "雇员");            this.ListBoxFill();            this.labelMsg.Text = "选定的记录已经被删除";        }        //当在列表框中单击一项时执行以下事件处理程序        private void listBoxEmployee_Click(object sender, EventArgs e)        {            DataRow dr = null;            if (this.listBoxEmployee.SelectedIndex != -1)            {                dr = this.ds.Tables[0].Select("雇员ID=" + this.listBoxEmployee.SelectedValue)[0];                this.textBoxSurName.Text = dr["姓氏"].ToString();                this.textBoxName.Text = dr["名字"].ToString();            }        }        //当单击 退出 按钮时执行以下事件处理程序        private void buttonExit_Click_1(object sender, EventArgs e)        {            Application.Exit();        }    }}

 项目工程源码下载:

链接:http://pan.baidu.com/s/1c0d9HN6 密码:qtgb

Winform操作Access数据库增删改操作学习笔记