แบบฝึกหัด

โปรแกรมที่ 12.1

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

        }

        private void get_text_Click(object sender, EventArgs e)

        {

            MessageBox.Show(MessageText.Text, "Output");

        }

    }

}

โปรแกรมที่  12.2

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void add_Click(object sender, EventArgs e)

        {

            Int32 A, B, X;

            A = Convert.ToInt32(input_A.Text);

            B = Convert.ToInt32(input_B.Text);

            X = A + B;

            Output.Text = X.ToString();

        }

    }

}

โปรแกรมที่12.3

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void show_Click(object sender, EventArgs e)

        {

            image.ImageLocation = "C:\\Documents and Settings\\Student\\Desktop\\1\\pic1.jpg";

            image.Load();

        }

        private void delete_Click(object sender, EventArgs e)

        {

            image.Image = null;

        }

    }

}