1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Data;
  5 using System.Drawing;
  6 using System.Linq;
  7 using System.Text;
  8 using System.Threading.Tasks;
  9 using System.Windows.Forms;
 10 
 11 namespace proj9_1
 12 {
 13     public partial class Form1 : Form
 14     {
 15         public Form1()
 16         {
 17             InitializeComponent();
 18         }
 19 
 20         private void button1_Click(object sender, EventArgs e)
 21         {
 22             Form myform = new Form1_1();
 23             myform.ShowDialog();
 24 
 25         }
 26 
 27         private void Form1_Load(object sender, EventArgs e)
 28         {
 29             //MessageBox.Show("3个按钮", "信息提示", MessageBoxButtons.AbortRetryIgnore);
 30             listBox1.Items.Add("清华大学"); listBox1.Items.Add("北京大学");
 31             listBox1.Items.Add("北京航空航天大学"); listBox1.Items.Add("人民大学");
 32             listBox1.Items.Add("南京大学"); listBox1.Items.Add("武汉大学");
 33             listBox1.Items.Add("山东大学"); listBox1.Items.Add("复旦大学");
 34             enbutton();
 35         }
 36 
 37         private void enbutton()
 38         {
 39             if (listBox1.Items.Count == 0)
 40             {
 41                 button7.Enabled = false; button8.Enabled = false;
 42             }
 43             else
 44             {
 45                 button7.Enabled = true; button8.Enabled = true;
 46             }
 47             if (listBox2.Items.Count == 0)
 48             {
 49                 button9.Enabled = false; button10.Enabled = false;
 50             }
 51             else
 52             {
 53                 button9.Enabled = true; button10.Enabled = true;
 54             }
 55         }
 56 
 57         private void button2_Click(object sender, EventArgs e)
 58         {
 59             Form myform = new Form1_2();
 60             myform.Show();
 61         }
 62 
 63         private void richTextBox1_TextChanged(object sender, EventArgs e)
 64         {
 65 
 66         }
 67 
 68         private void groupBox1_Enter(object sender, EventArgs e)
 69         {
 70 
 71         }
 72 
 73         private void checkBox1_CheckedChanged(object sender, EventArgs e)
 74         {
 75             MessageBox.Show("3个按钮", "信息提示", MessageBoxButtons.AbortRetryIgnore);
 76         }
 77 
 78         private void button3_Click(object sender, EventArgs e)
 79         {
 80             if (checkBox1.Checked && checkBox3.Checked && !checkBox2.Checked && !checkBox4.Checked)
 81             {
 82                 MessageBox.Show("您答对了，真的很棒！！！", "信息提示", MessageBoxButtons.OK);
 83             }
 84             else
 85                 MessageBox.Show("您答错了，继续努力。", "信息提示", MessageBoxButtons.OK);
 86         }
 87 
 88         private void button4_Click(object sender, EventArgs e)
 89         {
 90             if (radioButton3.Checked)
 91             {
 92                 MessageBox.Show("您选对了", "提示", MessageBoxButtons.OK);
 93             }
 94             else if (radioButton1.Checked || radioButton4.Checked)
 95             {
 96                 MessageBox.Show("您选错了", "提示", MessageBoxButtons.OKCancel);
 97             }
 98             else
 99             {
100                 MessageBox.Show("您选错了，这是数据库系统", "提示", MessageBoxButtons.OKCancel);
101             }
102         }
103 
104         private void button5_Click(object sender, EventArgs e)
105         {
106             pictureBox1.Image = Image.FromFile("E:\\flac3d.jpg");
107 
108         }
109 
110         private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
111         {
112 
113         }
114 
115         private void button6_Click(object sender, EventArgs e)
116         {
117             if (textBox1.Text != "")
118                 if (!comboBox1.Items.Contains(textBox1.Text))
119                     comboBox1.Items.Add(textBox1);
120         }
121 
122 
123 
124         private void button7_Click(object sender, EventArgs e)
125         {
126             if (listBox1.SelectedIndex >= 0)
127             {
128                 listBox2.Items.Add(listBox1.SelectedItem);
129                 listBox1.Items.RemoveAt(listBox1.SelectedIndex);
130             }
131             enbutton();
132         }
133         private void button8_Click(object sender, EventArgs e)
134         {
135             foreach (var item in listBox1.Items)
136             {
137                 listBox2.Items.Add(item);
138             }
139             enbutton();
140             listBox1.Items.Clear();
141         }
142 
143     }
144 }