c# windows编程控件学习-1

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

namespace proj9_1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Form myform = new Form1_1();
            myform.ShowDialog();

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //MessageBox.Show("3个按钮", "信息提示", MessageBoxButtons.AbortRetryIgnore);
            listBox1.Items.Add("清华大学"); listBox1.Items.Add("北京大学");
            listBox1.Items.Add("北京航空航天大学"); listBox1.Items.Add("人民大学");
            listBox1.Items.Add("南京大学"); listBox1.Items.Add("武汉大学");
            listBox1.Items.Add("山东大学"); listBox1.Items.Add("复旦大学");
            enbutton();
        }

        private void enbutton()
        {
            if (listBox1.Items.Count == 0)
            {
                button7.Enabled = false; button8.Enabled = false;
            }
            else
            {
                button7.Enabled = true; button8.Enabled = true;
            }
            if (listBox2.Items.Count == 0)
            {
                button9.Enabled = false; button10.Enabled = false;
            }
            else
            {
                button9.Enabled = true; button10.Enabled = true;
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Form myform = new Form1_2();
            myform.Show();
        }

        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void groupBox1_Enter(object sender, EventArgs e)
        {

        }

        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {
            MessageBox.Show("3个按钮", "信息提示", MessageBoxButtons.AbortRetryIgnore);
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (checkBox1.Checked && checkBox3.Checked && !checkBox2.Checked && !checkBox4.Checked)
            {
                MessageBox.Show("您答对了，真的很棒！！！", "信息提示", MessageBoxButtons.OK);
            }
            else
                MessageBox.Show("您答错了，继续努力。", "信息提示", MessageBoxButtons.OK);
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (radioButton3.Checked)
            {
                MessageBox.Show("您选对了", "提示", MessageBoxButtons.OK);
            }
            else if (radioButton1.Checked || radioButton4.Checked)
            {
                MessageBox.Show("您选错了", "提示", MessageBoxButtons.OKCancel);
            }
            else
            {
                MessageBox.Show("您选错了，这是数据库系统", "提示", MessageBoxButtons.OKCancel);
            }
        }

        private void button5_Click(object sender, EventArgs e)
        {
            pictureBox1.Image = Image.FromFile("E:\flac3d.jpg");

        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {

        }

        private void button6_Click(object sender, EventArgs e)
        {
            if (textBox1.Text != "")
                if (!comboBox1.Items.Contains(textBox1.Text))
                    comboBox1.Items.Add(textBox1);
        }



        private void button7_Click(object sender, EventArgs e)
        {
            if (listBox1.SelectedIndex >= 0)
            {
                listBox2.Items.Add(listBox1.SelectedItem);
                listBox1.Items.RemoveAt(listBox1.SelectedIndex);
            }
            enbutton();
        }
        private void button8_Click(object sender, EventArgs e)
        {
            foreach (var item in listBox1.Items)
            {
                listBox2.Items.Add(item);
            }
            enbutton();
            listBox1.Items.Clear();
        }

    }
}