4单元练习

Test4_1

 

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;
        }
    }

Test4_2

 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);

 2，3，4，5 的题都相似。

Test4_6

 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
        }

 Test4_7

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;
        }

7,8相似

Test4_9

  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

Test4_10

 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;
        }

 Test4_11

Test4-12

private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {   if (checkBox1.Checked == true)
            {
                monthCalendar1.ShowToday = true;
            }
            else
                monthCalendar1.ShowToday = false;
        }
//选中checkBox2,3时，代码相似

 Test4_13

 private void timer1_Tick(object sender, EventArgs e)
        {
            {
                if (this.progressBar1.Value == this.progressBar1.Maximum)
                {
                    this.progressBar1.Value = this.progressBar1.Minimum;
                }
                else
                    this.progressBar1.Value += 5;
            }
            
                if (this.progressBar2.Value == this.progressBar2.Maximum)
                { this.progressBar2.Value = this.progressBar2.Minimum; }
                else
                    this.progressBar2.Value += 20;
            
        }//Timer的Enabled 为TURE

 Test4_14

Test4_15

  private void button1_Click(object sender, EventArgs e)
        {
            // if(button1.Click==true)
            this.timer1.Start();
            this.button1.Enabled = false;
            this.button2.Enabled = true;

        }//button2相反的设定

　第16题基本相似，略过

Test4_17

18题与19题相似

Test4_19

 private void timer1_Tick(object sender, EventArgs e)
        {

            this.dateTimePicker1.Value = this.dateTimePicker1.Value.AddSeconds(1);

        }//使计时器的时间比当前时间快1秒
 private void button1_Click(object sender, EventArgs e)
        {
            if (this.dateTimePicker1.Enabled == false)
                this.dateTimePicker1.Enabled = true;//使计时器控件为打开
            this.button1.Enabled = false;//使button1不能被选中
            this.timer1.Start();//使计时器为打开状态
            this.button2.Enabled = true;//使button2能被选中
        }
//butoon2的代码与button1相反

 Test4_20

 private void timer1_Tick(object sender, EventArgs e)
        {
            monthCalendar1.SelectionStart = monthCalendar1.SelectionStart.AddDays(1);
        }//只有添加日期的一点不一样，其余跟19题一样