public vanphongchibo checklogin(string taikhoan, string matkhau)
{
vanphongchibo curuser = null;
db_connection();
cmd = new SqlCommand();
cmd.CommandText = "Select taikhoan,matkhau,hoten,capdo from users where taikhoan=@taikhoan and matkhau=@matkhau";
cmd.Parameters.AddWithValue("@taikhoan", taikhoan);
cmd.Parameters.AddWithValue("@matkhau", matkhau);
cmd.Connection = connect;
SqlDataReader login = cmd.ExecuteReader();
if (login.Read())
{
string tk = login.GetString(0);
string mk = login.GetString(1);
string ht = login.GetString(2);
int cd = login.GetInt32(3);
if (cd == 1)
{
curuser = new vanphongchibo(tk, mk, ht, cd);
}
else
{
curuser = new vanphongdanguy(tk, mk, ht, cd);
}
// connect.Close();
}
return(curuser);
}
private void button1_Click(object sender, EventArgs e)
{
vanphongchibo curuser = db.checklogin(textBoxtaikhoan.Text, textBoxmatkhau.Text);
if (textBoxtaikhoan.Text == "")
{
labelthongbaotaikhoan.Visible = true;
}
else if (textBoxmatkhau.Text == "")
{
labelthongbaomatkhau.Visible = true;
}
else if (curuser != null)
{
this.Hide();
formhethongquanly htql = new formhethongquanly();
htql.Show();
}
else
{
labelthongbao.Visible = true;
}
}
