Get DataTable From Gridview

bool firstTime = true;

    System.Data.DataTable dt;

    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

    {

        if (e.Row.RowType == DataControlRowType.DataRow)

            if (this.firstTime)

            {

                System.Data.DataView dv =

                     (e.Row.DataItem as System.Data.DataRowView).DataView;

                this.dt = dv.ToTable();               

                this.firstTime = false;

            }

    }