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 = this.textBoxSurName.Text; this.da.InsertCommand.Parameters["名字"].Value = 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 = this.listBoxEmployee.SelectedValue; this.da.UpdateCommand.Parameters["姓氏"].Value = this.textBoxSurName.Text; this.da.UpdateCommand.Parameters["名字"].Value = this.textBoxName.Text; //获取当前选择的数据行 DataRow dr = this.ds.Tables["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 = this.listBoxEmployee.SelectedValue; //获取要删除的数据行 DataRow dr = this.ds.Tables[0].Select("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
时间: 2024-12-29 17:17:19