protected void ddlCampaña_SelectedIndexChanged(object sender, EventArgs e) { Cargar_Members(); if (ddlCampaña.SelectedValue.ToString() != "N/A") { btnAgregarAlertasMail.Enabled = true; IList <UserCampaign> uC = n.GetSubscriptors(ddlCampaña.SelectedValue.ToString()); foreach (GridViewRow grd in grdMembers.Rows) { CheckBox chk = (CheckBox)grd.FindControl("chkAlertar"); chk.Enabled = true; foreach (UserCampaign u in uC) { if (Membership.GetUser(grd.Cells[0].Text).ProviderUserKey.ToString() == u.UserID.ToString()) { chk.Checked = true; } } } } else { btnAgregarAlertasMail.Enabled = false; } }