public bool checkLogin(string txtName, string txtPass, studentDataSet dts)
{
DataTable dt = new DataTable();
if (dts.student.Count() > 0)
{
dt = dts.Tables["Student"];
var q = from qds in dt.AsEnumerable()
where qds.Field <string>("S_ID").ToString().Trim() == txtName.ToString().Trim() &&
qds.Field <string>("S_cardID").ToString().Trim() == txtPass.ToString().Trim()
select new
{
userID = qds.Field <string>("S_ID").ToString(),
userpass = qds.Field <string>("S_cardID").ToString()
};
if (q.Count() <= 0)
{
return(false);
}
else
{
return(true);
}
}
else
{
return(false);
}
}
private void button1_Click(object sender, EventArgs e)
{
student c = new student();
bool resLog = false;
studentDataSet ds = studentDataSet;
resLog = c.checkLogin(textBox1.Text, textBox2.Text, ds);
if (resLog)
{
Form2 frm1 = new Form2();
frm1.ShowDialog();
frm1.Activate();
this.Hide();
this.Close();
}
else
{
MessageBox.Show("ใส่ข้อมูลผิด");
textBox1.Text = "";
textBox2.Text = "";
textBox1.Focus();
}
}