窗口应用设计

Form2
 private void button1_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,继续努力吧", "信息提示", MessageBoxButtons.OK);
        }

Form3

  private void button1_Click(object sender, EventArgs e)
        {
            if (radioButton3.Checked)
                 MessageBox.Show("您选对了,这是微软公司开发的操作系统","信息提示", MessageBoxButtons.OK);
            else if (radioButton1.Checked || radioButton4.Checked)
                MessageBox.Show("您选错了,这是程序设计语言", "信息提示", MessageBoxButtons.OK);
            else
                MessageBox.Show("您选错了,这是数据库管理系统", "信息提示", MessageBoxButtons.OK);
        }

Form4

 private void button1_Click(object sender, EventArgs e)
        {
            pictureBox1.Image = Image.FromFile("SPRING.jpg");
        }

        private void button2_Click(object sender, EventArgs e)
        {
            pictureBox1.Image = Image.FromFile("SUMMER.jpg");
        }

        private void button3_Click(object sender, EventArgs e)
        {
            pictureBox1.Image = Image.FromFile("FALL.jpg");
        }

        private void button4_Click(object sender, EventArgs e)
        {
            pictureBox1.Image = Image.FromFile("WINTER.jpg");
        }
Form5

 private void button1_Click(object sender, EventArgs e)
        {
             if (textBox1.Text != "")
                 if (!comboBox1.Items.Contains(textBox1.Text))
                     comboBox1.Items.Add(textBox1.Text); //不添加重复项
        }

Form6

  private void Form7_Load(object sender, EventArgs e)
        {
            listBox1.Items.Add("清华大学");
            listBox1.Items.Add("北京大学");
            listBox1.Items.Add("浙江大学");
            listBox1.Items.Add("南京大学");
            listBox1.Items.Add("武汉大学");
            listBox1.Items.Add("中国科技大学");
            listBox1.Items.Add("中国人民大学");
            listBox1.Items.Add("华中科技大学");
            listBox1.Items.Add("复旦大学");
            enbutton();         //调用enbutton()方法
        }
        private void enbutton()     //自定义方法
        {
            if (listBox1.Items.Count == 0)
            {
                button1.Enabled = false;
                button2.Enabled = false;
            }
            else
            {
                button1.Enabled = true;
                button2.Enabled = true;
            }
            if (listBox2.Items.Count == 0)
            {
                button3.Enabled = false;
                button4.Enabled = false;
            }
            else
            {
                button3.Enabled = true;
                button4.Enabled = true;
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (listBox1.SelectedIndex >= 0)
            {
                listBox2.Items.Add(listBox1.SelectedItem);
                listBox1.Items.RemoveAt(listBox1.SelectedIndex);
            }
            enbutton();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            foreach (object item in listBox1.Items)
                listBox2.Items.Add(item);
            listBox1.Items.Clear();
            enbutton();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (listBox2.SelectedIndex >= 0)
            {
                listBox1.Items.Add(listBox2.SelectedItem);
                listBox2.Items.RemoveAt(listBox2.SelectedIndex);
            }
            enbutton();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            foreach (object item in listBox2.Items)
                listBox1.Items.Add(item);
            listBox2.Items.Clear();
            enbutton();
        }

Form7
 private void Form8_Load(object sender, EventArgs e)
        {
            checkedListBox1.Items.Add("中国");
            checkedListBox1.Items.Add("美国");
            checkedListBox1.Items.Add("俄罗斯");
            checkedListBox1.Items.Add("英国");
            checkedListBox1.Items.Add("法国");
            checkedListBox1.CheckOnClick = true;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            foreach(object item in checkedListBox1.CheckedItems)
                listBox1.Items.Add(item);
        }

标签：窗口,listBox1,Items,void,object,private,Add,应用,设计
来源： https://blog.csdn.net/qq_55080421/article/details/122105514