組合框和計時器在Visual Studio 2012

Question

編輯後的代碼是：

private void Form1_load(object sender, EventArgs e) 
{ 
} 

private void ComboBox1_SelectedIndexChanged(object sender, System.EventArgs e) 

    { 
     try 
     { 
      if (comboBox1.Text == "Present") 
      { 

       label47.Text = DateTime.Now.ToShortDateString(); 
       label9.Text = DateTime.Now.ToShortTimeString(); 
      } 
     } 
     catch (Exception) 
     { 

     } 
    } 
} 
} 

Answer 1

使用選定的索引更改事件

private void ComboBox1_SelectedIndexChanged(object sender,System.EventArgs e) 
{ 
try 
{ 
    if(ComboBox1.Text == "present") 
    { 
     label.Text = DateTime.Now.ToString(@"MM\/dd\/yyyy HH:mm"); 
    } 
}catch(Exception) 
{ 
} 
}