protected void btnGo_Click(object sender, EventArgs e) { obj = new Reproduce(); dtSongsTable = ((DataTable)Session["TBLSONGS"]).Copy(); //look for the sound among the three songs string value = ""; if (ddlFrog.SelectedIndex == 0 && ddlDragonFly.SelectedIndex == 0 && ddlCriket.SelectedIndex == 0) { lblMensaje.Text = "You have selected no sound!!"; } else { if (ddlFrog.SelectedIndex > 0) { value = ddlFrog.SelectedValue; } if (ddlDragonFly.SelectedIndex > 0) { value = ddlDragonFly.SelectedValue; } if (ddlCriket.SelectedIndex > 0) { value = ddlCriket.SelectedValue; } lblMensaje.Text = obj.captureMessage(value, dtSongsTable); } }