void ToAdd()//准备新增分组
{
Operation = true;
button1.Text = "确认新增";
textBox1.Text = "";
numericUpDown1.Value = 50;
LB.ClearSelected();
LB.Focus();
}
void ToAdd()
{
Operation = true;
button2.Text = "确认新增";
textBox1.Text = "";
dateTimePicker1.Value = DateTime.Now;
checkBox1.Checked = false;
LB.ClearSelected();
label2.Text = "";
label4.Text = "";
LB.Focus();
}