private void btncapnhat_Click(object sender, EventArgs e)
{
if (kiemtra())
{
sinhvien sv = new sinhvien();
sv = GetSinhvien();
bool kqsua = qlsv.sua(sv, sv.mssv, sstheoma);
if (kqsua)
{
this.loadlistview();
qlsv.ghifile();
}
}
}
