Updating Progress bar value while values are inserted into database

See more:

C#

MS-Access

i am developing an application in c# that extracts data from a text file & inserts those values into the database. the amount of data to be inserted is way too huge(>100000) & while the data is being inserted, the application shows "Not responding"...

my requirements
1) How do i avoid the "Not Responding" Message
2) i want to update the progress bar as the data is inserted into the database, to show the progress

here is the code that i am using to store into the db

string str;
            List<data> gd = new List<data>();
            try
            {
                using (StreamReader sr = new StreamReader("C:\\Windows\\Temp\\op.txt"))
                {
                    string line;
                    while ((line = sr.ReadLine()) != null)
                    {
                        string[] arr = line.Split(new char[] { ' ' }, System.StringSplitOptions.RemoveEmptyEntries);
                        while (sr.Peek() > 0)
                        {

                            string[] s = new string[] { " " };
                            char[] c = new char[] { ' ' };
                            str = sr.ReadLine();
                            arr = str.Split(c);

                            data d = new data();
                            d.date = arr[0];
                            d.time = arr[1];
                            d.lat = Convert.ToDouble(arr[3]);
                            d.lon = Convert.ToDouble(arr[4]);
                            if (arr[6] == "")
                            {
                                d.depth = arr[7];
                            }
                            else
                            {
                                d.depth = arr[6];
                            }
                            if (arr[8] == "")
                            {
                                d.mag = arr[9];
                            }
                            else
                            {
                                d.mag = arr[8];
                            }
                            //MessageBox.Show(d.depth);
                            OleDbConnection cn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Application.StartupPath + "/earthDB.mdb;Persist Security Info=True");
                            OleDbCommand cmd = new OleDbCommand();
                            cn.Open();
            cmd.Connection = cn;
           
            cmd.CommandText = "insert into Nass values(@DateTime,@Latitude,@Longitude,@Depth,@Magnitude)";

            cmd.Parameters.AddWithValue("@DateTime",d.date +" "+d.time);
            cmd.Parameters.AddWithValue("@Latitude",d.lat);
            cmd.Parameters.AddWithValue("@Longitude",d.lon);
            cmd.Parameters.AddWithValue("@Depth",d.depth);
            cmd.Parameters.AddWithValue("@Magnitude",d.mag);

            try
            {
                cmd.ExecuteNonQuery();
                cn.Close();

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                cn.Close();
            }
            finally
            {
                cn.Close();
            }

plzz help..