Need Help with making a dynamic check box

I decided to go with a database instead. I am having a problem though.

So I am using a database that will have say 10values letters and 10image urls in it. So I am going to make a check box for each one and a image box for each one.

I have managed to make the text boxes appear and the images but I want the user to choose what check boxes they want and then hit a button. When they hit the button it would go through all the checkboxes and see if they where selected(this is where I run into problems).

However I am doing all this code in the page_load and it seems that after it has finished loading those boxes that where made can't be access. So now I can't check which ones where selected.

So in my button I have

protected void Button1_Click(object sender, EventArgs e)
    {

        if (test.Checked == true)
        {
            ArrayList arrary = new ArrayList();
            arrary.Add(test.ID);
            Response.Write(test.ID + "checked" + "
");
         }
    }

So the line where I have test.checked, test being the checkbox object name does not work since it can't access it anymore

Here is my full code

1    using System;
2    using System.Data;
3    using System.Configuration;
4    using System.Collections;
5    using System.Web;
6    using System.Web.Security;
7    using System.Web.UI;
8    using System.Web.UI.WebControls;
9    using System.Web.UI.WebControls.WebParts;
10   using System.Web.UI.HtmlControls;
11   using System.Data.SqlClient;
12   
13   public partial class Default4 : System.Web.UI.Page
14   {
15       
16       protected void Page_Load(object sender, EventArgs e)
17       {
18           SqlConnection conn = new SqlConnection("Server=localhost\\SqlExpress;Database=Japanese;" + 
19               "Integrated Security=True");
20           SqlCommand comm = new SqlCommand("SELECT HiriganaID,letter,image FROM test", conn);
21           conn.Open();
22           SqlDataReader reader = comm.ExecuteReader();
23           while (reader.Read())
24           {
25               CheckBox test = new CheckBox();
26               
27               test.ID = (string) reader["letter"];
28   
29               Image image = new Image();
30               image.ImageUrl = (string)reader["image"];
31               Panel1.Controls.Add(image);
32               Panel1.Controls.Add(new LiteralControl("<br />"));
33               Panel1.Controls.Add(new LiteralControl(" "));
34               Panel1.Controls.Add(new LiteralControl(" "));
35               Panel1.Controls.Add(new LiteralControl(" "));
36               Panel1.Controls.Add(test);
37               Panel1.Controls.Add(new LiteralControl("<br />"));
38           }
39           reader.Close();
40           conn.Close();
41       }
42       protected void Button1_Click(object sender, EventArgs e)
43       {
44   
45           if (test.Checked == true)
46           {
47               ArrayList arrary = new ArrayList();
48               arrary.Add(test.ID);
49               Response.Write(test.ID + "checked" + "<br />");
50            } 
51       }
52      
53      
54   }
55   
56   
57

So this leads me to believe that I am not putting my code in the right place. So what am I doing wrong?