Unable to update Gridview changes back to SQLite

I am trying to create a simple windows form to

1. Display all data from SQLite table (Completed)
2. Display data in grid view and make the grid editable(Completed) (I marked the Grid view as editable in Windows Form)
3. Insert/Update/Delete the data in SQLite table based on the changes in grid view. (Problem!). I tried to set the Insert/Update/Delete using SQLiteCommandBuilder but nothing worked :(

Thanks in advance.

FillData is used to populate the in Grid view and updatechanges click should be insert/update/delete from SQLLite based on the changes in grid view.

private void FillData()
    {
        SQLiteConnection conn = new SQLiteConnection(objLogic.dbConnection);
        dtReviewers.AutoGenerateColumns = true;
        string selectCommand = "SELECT * FROM Student";
        da = new SQLiteDataAdapter(selectCommand, conn);
        conn.Open();
        ds = new DataSet();
        SQLiteCommandBuilder commandBuilder = new SQLiteCommandBuilder(da);
        da.Fill(ds, "Design1");
        dtReviewers.DataSource = ds.Tables[0];
        //dtReviewers.DataMember = "Design1";
    }
    private void UpdateChanges_Click(object sender, EventArgs e)
    {
        SQLiteConnection conn = new SQLiteConnection(objLogic.dbConnection);
        try
        {
            dtReviewers.EndEdit();

            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                ds.Tables[0].Rows[i].AcceptChanges();
                //if (dtReviewers.Rows[i].RowState == DataRowState.Modified)
                //{
                ds.Tables[0].Rows[i].SetModified();
                //}
            }     
           // SQLiteCommandBuilder oBuilder = new SQLiteCommandBuilder(da);
           // da.UpdateCommand = oBuilder.GetUpdateCommand();
            //da.AcceptChangesDuringUpdate = true;


            da.Update(ds.Tables[0]);
            ds.AcceptChanges();
            conn.Close();
        }
        catch (Exception ex)
        {
            throw ex;
        }

    }