Bulleted List Master Detail with DisplayMode=LinkButton (C#)

Hi,
I need to do the following: after calling a web service, the result of that call is a list. I need to display that list in a Master/Detail way using a bulleted list for the Master data and the LinkButton DisplayMode for the Detail data of each item.

With the code I currently have, I can display the Master data of the list with the Button1_click event handler, but I cannot display the details with the BulletedListMedicare_click.

when I use

LabelMedicare3.Text = supList.SupplierDatas[n].CompanyName

to access the data in the list, I get an error. This may have to do with the scope of the list, but I am new to C# so am lost.

Thanks in advance and regards.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml;
using System.Configuration;
using System.Data;
using System.Web.Security;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls.Adapters;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.IO;
using System.Xml.XPath;
using System.Xml.Xsl;
using System.Net;


using InfoSoftGlobal;

public partial class Medicare : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }


    protected void Button1_Click(object sender, EventArgs e)
    {
        medicare.MediCareSupplier mc = new medicare.MediCareSupplier();
        medicare.SupplierDataList supList;
        bool resOK;
        resOK = mc.GetSupplierByZipCode(TextBox1.Text, out supList);

        for (int i = 0; i < supList.TotalRecords; i++)
        {
            BulletedListMedicare.Items.Add(supList.SupplierDatas[i].CompanyName);

        }

    }

    protected void BulletedListMedicare_click(object sender,BulletedListEventArgs e)
    {
        ListItem li = BulletedListMedicare.Items[e.Index];
        LabelMedicare1.Text = "You selected = " + li.Text + ", with value = "
            + li.Value;
        LabelMedicare2.Text = "The Index of Item you clicked: " + e.Index + "<br> The value of Item you clicked: " + BulletedListMedicare.Items[e.Index].Text;
        this.BulletedListMedicare.Focus();
        int n = e.Index;
LabelMedicare3.Text = supList.SupplierDatas[n].CompanyName;

        
    }

}

Select allOpen in new window