一个if上的两个ComboBox SelectedIndex

Question

private void cboFrom_SelectedIndexChanged(object sender, EventArgs e)
{
    if (cboFrom.SelectedIndex == 1 && cboTo.SelectedIndex == 2) 
        Price.Text = "1000"; 
    else if (cboFrom.SelectedIndex == 1 && cboTo.SelectedIndex == 3)
        Price.Text = "2000";
}

此代码应将Label Text（Price.Text）更改为我在此if语句中设置的值，但它不会执行任何操作。< / p>