private void btoDelete_Click(object sender, EventArgs e)
{
if (lvLessons.SelectedItems.Count == 0)
{
return;
}
if (MessageBox.Show("确定要删除吗?", "", MessageBoxButtons.OKCancel) == DialogResult.OK)
{
int i = CourseManageAction.delopenCourse(lvLessons.SelectedItems[0].SubItems[0].Text.Trim());
MessageBox.Show(i + " row(s) affected");
}
CourseManageAction.loadAllCourse(lvCourse);
}