How to update the access DB with oledbadapter

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C#

WinForms

Hi Friends...
I have a written a function in a separate class file which return Dataset. This function help me to bind the datagridview.

public DataSet dsreturn_edit(DataSet ds, String qry)
        {
            try
            {

                if (conn.State == ConnectionState.Closed)
                { conn.Open(); }

                OleDbCommand itemcmd = new OleDbCommand(qry, conn);
                OleDbDataAdapter adapter = new OleDbDataAdapter(itemcmd);
                adapter.Fill(ds, "DailyData");
                return ds;
            }
            catch (Exception ex)
            {
                MessageBox.Show("There was an error loading data to dataset. DETAIL: " + ex.ToString(), "My Application");
            }
            finally
            {
                conn.Close();
            }
            return ds;
        }

In the form load event I am binding the Datagridview like this

BindingSource bs = new BindingSource();
           DataSet ds = new DataSet();
           bs.DataSource = dc.dsreturn(ds, "Select ID,FullName,Mobile,DOB,Gender,Status from Family").Tables[0];
           dataGridView1.DataSource = bs;

My requirement is to update the datagridview with a button click. I need to use like this.

adapter.Update(dataTable);

Problem is that, in the form i am not using any adapter object. My ultimate is to update the DB with Update Keyword