//==========
动态程序部分================
using
System;
using
System.Collections.Generic;
using
System.ComponentModel;
using
System.Data;
using
System.Data.SqlClient;
using
System.Drawing;
using
System.Text;
using
System.Windows.Forms;
namespace
WindowsApplication1
{
public partial class Form8 : Form
{
public Form8()
{
InitializeComponent();
}
DataBase mydatabase = new DataBase();
//
注意:下面两个变量ds,dt很重要,负责保留状态信息。
public DataSet ds = new DataSet();
public DataTable dt = new DataTable();
/// <summary>
///
更新数据信息
/// </summary>
public void updatData()
{
String sql = "select * from student";
if (mydatabase.doUpdate(ds, sql, dt.TableName))
{
MessageBox
.Show("
数据更新成功"
, "
提示"
, MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
MessageBox.Show("
数据更新失败,请检查数据是否合法!"
, "
提示"
, MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
/// <summary>
///
初始化加载事件代码
/// </summary>
private void Form8_Load(object sender, EventArgs e)
{
ds = mydatabase.GetDataSet("select * from student");
dt = ds.Tables[0];
dataGridView1.DataSource = dt.DefaultView;
}
/// <summary>
///
更新数据信息
/// </summary>
private void btnUpdata_Click(object sender, EventArgs e)
{
updatData();//
更新数据
}
///
<summary>
///
删除数据信息
/// </summary>
private void btnDelete_Click(object sender, EventArgs e)
{
if (DialogResult.Yes == MessageBox.Show("
数据删除后将不可恢复,真的要删除吗?"
, "
提示"
, MessageBoxButtons.YesNo, MessageBoxIcon.Warning))
{
dataGridView1.Rows.RemoveAt(dataGridView1.CurrentRow.Index);
dataGridView1.Refresh();
updatData();//
更新数据
}
}
/// <summary>
///
到头
/// </summary>
private void button1_Click(object sender, EventArgs e)
{
int i = dataGridView1.SelectedRows[0].Index;
dataGridView1.Rows[i].Selected = false;
dataGridView1.Rows[0].Selected = true;
showmess();
}
/// <summary>
///
下一条
/// </summary>
private void button3_Click(object sender, EventArgs e)
{
int i = dataGridView1.SelectedRows[0].Index;
if (i < dataGridView1.Rows.Count - 1)
{
dataGridView1.Rows[i].Selected = false;
dataGridView1.Rows[i + 1].Selected = true;
showmess();
}
else
{
MessageBox
.Show("
已经是最后一项了!"
, "
提示"
, MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
/// <summary>
///
上一条
/// </summary>
private void button2_Click(object sender, EventArgs e)
{
int i = dataGridView1.SelectedRows[0].Index;
if (i != 0)
{
dataGridView1.Rows[i].Selected = false;
dataGridView1.Rows[i - 1].Selected = true;
showmess();
}
else
{
MessageBox
.Show("
已经是第一项了!"
, "
提示"
, MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
/// <summary>
///
到尾
/// </summary>
private void button4_Click(object sender, EventArgs e)
{
int i = dataGridView1.SelectedRows[0].Index;
dataGridView1.Rows[i].Selected = false;
dataGridView1.Rows[dataGridView1.Rows.Count - 1].Selected = true;
showmess();
}
/// <summary>
///
底部显示信息
/// </summary>
private void showmess()
{
toolStripStatusLabel1.Text = string.Format("
当前是第{0}条记录,共{1}条记录"
,dataGridView1.SelectedRows[0].Index+1,dataGridView1.Rows.Count);
toolStripProgressBar1.Value = (int)((double)(dataGridView1.SelectedRows[0].Index) / dataGridView1.Rows.Count*100);
}
///
退出系统
private void btnExit_Click(object sender, EventArgs e)
{
Application.Exit();
}
}
}