基于《C#中switch選擇語句配合下拉列表控件完成季節判斷與窗體顔色變化》視頻講解源代碼：

設計界面：

季節判斷與窗體背景顔色變化

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; } }

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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