NullReferenceException was unhandled

[maria cristina]

I make a windows form application with 4 text fields.
And I connect the database to it. When I run the program I want to display the data in text fields but it displays nothing as shown below:



and then I always got the error "NullReferenceE xception was unhandled". I don't know if why this happen. My codes is :

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace EmployeesDatabase
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

        }
        DatabaseConnection objConnect;
        string conString;

        DataSet ds;
        DataRow dRow;

        int MaxRows;
        int inc = 0;

        private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
                objConnect = new DatabaseConnection();
                conString = Properties.Settings.Default.EmployeesConnectionString;

                objConnect.connection_string = conString;
                objConnect.Sql = Properties.Settings.Default.SQL;

                ds = objConnect.GetConnection;
                MaxRows = ds.Tables[0].Rows.Count;


                NavigateRecords();
            }
            catch (Exception err)
            {
                MessageBox.Show(err.Message);
            }
        }

        private void NavigateRecords()
        {
            dRow = ds.Tables[0].Rows[t];
            txtFirstName.Text = dRow.ItemArray.GetValue(1).ToString();
            txtSurname.Text = dRow.ItemArray.GetValue(2).ToString();
            txtJobTitle.Text = dRow.ItemArray.GetValue(3).ToString();
            txtDepartment.Text = dRow.ItemArray.GetValue(4).ToString();
        }
    }
}

This is the screen show when I run the program, the error is in the method "NavigateRecord s". How can I solve this? Thanks in advance!

[ThatThatGuy]

Do check the count in the 'MaxRows' Variable before calling NavigateRecords (), I strongly feel there are no record returning from your query

[2147483648]

u r absolutely r8 that that why
without rows he is asking to navigagate the records........