Question

I have

staff table
staff_Id
staff_Accesscode values (access123,code123,staff12)....

i have done like this for getting all values in staff_accesscode

DataTable dt2 = null;
string sql = @"SELECT staff_AccessCode FROM staff";
dt2 = xxxxxx.GetData(sql, gBaseUrl);
if (dt2 != null && dt2.Rows.Count > 0)
{
   accessname = dt2.Rows[0]["staff_AccessCode"].ToString();
}

but the problem is it returns only last value stored in staff_Accesscode, I mean it returns only this value (staff12)

now i want to get the all values stored in staff_Accesscode field and further i want to check this value with the txtbox.text

Answer 1

You are accessing the first row (with index 0) only.
You might iterate through the complete result set:

for ( int i = 0; dt2 != null && i < dt2.Rows.Count; ++i )
{
    String tmp = dt2.Rows[ i ]["staff_AccessCode"].ToString();
    if ( tmp.Equals( what_ever_variable_or_constant /* e.g., txtbox.Text */ ) )
    {
        accessname = tmp;
        //break; ?
    }
}