protected void btnEdit_Click(object sender, EventArgs e)
{
string MaMH = "";
if (Request.QueryString["MaMH"] != null)
{
MaMH = Request.QueryString["MaMH"];
}
MonHoc.MonHoc_Update(txtTenKhoa.Text, Convert.ToInt32(txtTinChi.Text), Convert.ToInt32(MaMH));
Response.Redirect("Coursemanagement.aspx");
Response.Write("<script>alert('Sửa thành công')</script>");
}