ＳＱＬのＳＥＬＥＣＴで指定分の数のみの読み出し

protected void SqlDataSource1_Selecting(object sender, SqlDataSourceSelectingEventArgs e)
{
    string sqlStr = string.Format("SELECT KairanID, MenuID, KairanMei, ReleaseFlg, Hiduke, DelFlg FROM KairanMaster Order BY KairanID");
    SqlConnection conn = new SqlConnection(connStr);
    DataSet ds = new DataSet();

    try
    {
        SqlDataAdapter adapter = new SqlDataAdapter(sqlStr, conn);
        num = adapter.Fill(ds);
    }
    catch (Exception ex)
    {
        Response.Write(ex.Message);
    }
    if (ds.Tables.Count > 0)
    {
        :
        :
    }
    conn.Dispose();
}