基于《C#中switch选择语句配合下拉列表控件完成季节判断与窗体颜色变化》视频讲解源代码:

设计界面:

c语言switch语句与if语句的转换(中switch选择语句配合下拉列表完成季节判断与窗体颜色变化代码)(1)

季节判断与窗体背景颜色变化

季节判断:

private void button1_Click(object sender, EventArgs e) { switch(comboBox1.SelectedIndex 1) { case 3: case 4: case 5: textBox1.Text = "春季"; break; case 6: case 7: case 8: textBox1.Text = "夏季"; break; case 9: case 10: case 11: textBox1.Text = "秋季"; break; case 12: case 1: case 2: textBox1.Text = "冬季"; break; } }

窗体背景颜色变化:

private void comboBox2_SelectedIndexChanged(object sender, EventArgs e) { switch(comboBox2.SelectedIndex) { case 0: this.BackColor=Color.Red; break; case 1: this.BackColor = Color.Yellow; break; case 2: this.BackColor = Color.Blue; break; case 3: this.BackColor = Color.Green; break; case 4: this.BackColor = Color.Pink; break; } }

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