4单元练习

private void numericUpDown1_ValueChanged(object sender, EventArgs e)
        {
            trackBar1.Value = (int)numericUpDown1.Value;
        }

        private void trackBar1_Scroll(object sender, EventArgs e)
        {
            numericUpDown1.Value = trackBar1.Value;
        }
    }

 private void hScrollBar2_Scroll(object sender, ScrollEventArgs e)
        {
            this.BackColor = Color.FromArgb(hScrollBar1.Value, hScrollBar2.Value, hScrollBar3.Value);
        }

        private void hScrollBar3_Scroll(object sender, ScrollEventArgs e)
        {
            this.BackColor = Color.FromArgb(hScrollBar1.Value, hScrollBar2.Value, hScrollBar3.Value);
        }
//备注：在每个滚动条的hScrollBar2_Scroll里面都放上this.BackColor = Color.FromArgb(hScrollBar1.Value, hScrollBar2.Value, hScrollBar3.Value);

 private void trackBar2_Scroll(object sender, EventArgs e)
        {
            progressBar1.Value = trackBar2.Value;
            this.Opacity = 0.5 + (double)trackBar2.Value / 100;//设置透明状态
        }

private void radioButton2_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton1.Checked == true)
                comboBox1.SelectedIndex =1;
        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            switch (comboBox1.SelectedIndex)
            {
                case 0:radioButton1.Checked = true;break;
                case 1:radioButton2.Checked = true;break;
                case 2:radioButton3.Checked = true;break;
            }
        }

        private void radioButton1_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton1.Checked == true)
                comboBox1.SelectedIndex = 0;
        }

        private void radioButton3_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton1.Checked == true)
                comboBox1.SelectedIndex = 2;
        }

  private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {
            if (checkBox1.Checked == true)
                listBox1.Items.Add("English");
            else
                listBox1.Items.Remove("English");

        }

     //checkBox2,checkBox3和此相似

 private void domainUpDown1_SelectedItemChanged(object sender, EventArgs e)
        {
            // IBindingListView.Value = (int)numericUpDown1.Value;
            listBox2.SelectedIndex = domainUpDown1.SelectedIndex;
        }

        private void listBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            domainUpDown1.SelectedIndex = listBox2.SelectedIndex;
        }