private void deleteCousInfos(object sender, EventArgs e)
{
ContextMenuStrip context = (ContextMenuStrip)sender;
int info = teacherBll.deleteCourse(context.Text, tea_id);
if (info > 0)
{
MessageBox.Show("删除成功", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
showCourse();
}
else
{
MessageBox.Show("删除失败", "提示错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}