check checkbox from database in datagridview in c#

This is my code

private void Attendance_Load(object sender, EventArgs e) { WindowState = FormWindowState.Maximized; dtp_INTime.Value = DateTime.Now; dtp_INTime.Format = DateTimePickerFormat.Custom; dtp_INTime.CustomFormat = "dd-MMM-yyyy hh:mm"; dtp_INTime.MaxDate = DateTime.Now; dtp_OUTTime.Value = DateTime.Now; dtp_OUTTime.Format = DateTimePickerFormat.Custom; dtp_OUTTime.CustomFormat = "dd-MMM-yyyy hh:mm"; dtp_OUTTime.MaxDate = DateTime.Now; dataGridView1.AutoGenerateColumns = false; dataGridView1.AllowUserToAddRows = false; Binddata(); }

        private void Binddata()
        {
            con.Close();
            DataTable dt = new DataTable();
            SqlCommand cmd = new SqlCommand("select * from tbl_AttecndanceCheck", con);
            con.Open();
            SqlDataReader dr = cmd.ExecuteReader() ;
            dt.Load(dr);

            dataGridView1.AutoGenerateColumns = false;
            //dataGridView1.AllowUserToAddRows = false;

            dataGridView1.Columns[1].DataPropertyName = dt.Columns[0].ToString();
            dataGridView1.Columns[2].DataPropertyName = dt.Columns[1].ToString();

            dataGridView1.Columns[3].DataPropertyName = dt.Columns[2].ToString();

           if(dt.Rows.Count>0)
           {
               for (int i = 1; i < dt.Rows.Count; i++)
               {

                   if (Convert.ToBoolean(dt.Rows[i]["Status"]) == true)
                    {


                       MessageBox.Show("Hai");

                       DataGridViewCheckBoxCell ch1 = new DataGridViewCheckBoxCell();
                       ch1 = (DataGridViewCheckBoxCell)dataGridView1.Rows[i].Cells[7];

                       ch1.Selected = true;

                      // dataGridView1.Rows[i].Cells["Status"].Value = true;

                       //dataGridView1.Rows[i].Cells["Status"].Value = true;

                       //this.dataGridView1.Rows[i].Cells[7].Value ="True";

                       //dataGridView1.Rows[i].Cells[7].Value = 1;

                   }
               }


            }
           dataGridView1.DataSource = dt;