516) ADO.NET 또 다른 소스.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsApplication4
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}



DataTable table = null;

private void button1_Click(object sender, EventArgs e)
{

table = new DataTable("classtable");
DataColumn column;
DataRow row;


column = new DataColumn();
column.DataType = Type.GetType("System.String");
column.ColumnName = "이름";
column.AllowDBNull = false;
table.Columns.Add(column);

column = new DataColumn();
column.DataType = Type.GetType("System.Int32");
column.ColumnName = "국어";
column.AllowDBNull = false;
table.Columns.Add(column);


column = new DataColumn();
column.DataType = Type.GetType("System.Int32");
column.ColumnName = "영어";
column.AllowDBNull = false;
table.Columns.Add(column);

column.DataType = Type.GetType("System.Int32");
column = new DataColumn();
column.ColumnName = "수학";
column.AllowDBNull = false;
table.Columns.Add(column);

column.DataType = Type.GetType("System.Double");
column = new DataColumn();
column.ColumnName = "평균";
column.AllowDBNull = false;
table.Columns.Add(column);

row = table.NewRow();
row[0] = "전광식";
row[1] = 90;
row[2] = 80;
row[3] = 70;
row[4] = (90 + 80 + 70) / 3.0;
table.Rows.Add(row);

row = table.NewRow();
row[0] = "권오윤";
row[1] = 60;
row[2] = 60;
row[3] = 55;
row[4] = (60 + 60 + 55) / 3.0;
table.Rows.Add(row);

row = table.NewRow();
row[0] = "고정욱";
row[1] = 60;
row[2] = 60;
row[3] = 65;
row[4] = (60 + 60 + 65) / 3.0;
table.Rows.Add(row);

dataGrid1.DataSource = table;
}

private void button2_Click(object sender, EventArgs e)
{
try
{

string name = textBox1.Text;
int kor = Convert.ToInt32(textBox2.Text.Trim());
int eng = Convert.ToInt32(textBox3.Text.Trim());
int math = Convert.ToInt32(textBox4.Text.Trim());
int avg = (kor + eng + math) / 3;

DataRow row = table.NewRow();
row[0] = name;
row[1] = kor;
row[2] = eng;
row[3] = math;
row[4] = avg;
table.Rows.Add(row);
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
textBox4.Text = "";

}
catch
{
MessageBox.Show("입력값이 잘못되었습니다");
}




}

private void button3_Click(object sender, EventArgs e)
{
try
{
int index = dataGrid1.CurrentRowIndex;

int kor = Convert.ToInt32(textBox2.Text.Trim());
int eng = Convert.ToInt32(textBox3.Text.Trim());
int math = Convert.ToInt32(textBox4.Text.Trim());

DataRow row = table.Rows[index];
row.BeginEdit();
row[0] = textBox1.Text;
row[1] = kor;
row[2] = eng;
row[3] = math;
row.EndEdit();
MessageBox.Show("편집저장");
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
textBox4.Text = "";

}
catch
{
MessageBox.Show("잘못입력");
}


}



private void button4_Click(object sender, EventArgs e)
{
int index = dataGrid1.CurrentRowIndex;

DataRow row = table.Rows[index];
row.Delete();


}

private void button5_Click(object sender, EventArgs e)
{
table.Rows.Clear();
}

private void dataGrid1_MouseMove(object sender, MouseEventArgs e)
{
try
{
int index = dataGrid1.CurrentRowIndex;
DataRow row = table.Rows[index];

textBox1.Text = (string)row[0];
textBox2.Text = Convert.ToString(row[1]);
textBox3.Text = Convert.ToString(row[2]);
textBox4.Text = Convert.ToString(row[3]);
}
catch
{

}


}
}
}