private void bindingNavigatorAddNewItem_Click(object sender, EventArgs e)
 {
     using (销售明细录入 mForm = new 销售明细录入())
     {
         mForm.ShowDialog();
     }
 }
 private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
 {
     using (销售明细录入 mForm = new 销售明细录入())
     {
         mForm.ShowDialog();
     }
 }