Question

string strqry = "select dob from master_studentpersonal where stud_id= '" +
                                                           TextBox1.Text + "'";
DataTable dt = mc.selectQryDataTable2(strqry);
DataView dv = new DataView(dt);
DateTime dob = new DateTime();
if (dob != null)
{
    if (dob <= new DateTime(2004, 01, 01) &&
        dob <= new DateTime(2005, 12, 31))
    {
        TextBox6.Text = "Group A";

    }
    else if (dob <= new DateTime(2003, 12, 31) &&
             dob <= new DateTime(2002, 01, 01))
    {
        TextBox6.Text = "Group B";
    }
}

plz help me friends

Answer 1

dob will never be null, both because you assign it and because DateTime is a value type. Doesn’t fix your problem, but it’ll tidy your code 😉

More importantly though, you never assign a value to it, so it’s going to pick up an arbitrary value like DateTime.MinValue (at a guess).