Why are my .NET CheckListBox Items not selected?

Question

I have a web application I am programming that builds a SQL query based on user input. I am currently using a few check boxes without problems. However, instead of hard-coding the check boxes, I dynamically populated them on Page_Load with the following code:

protected void Page_Load(object sender, EventArgs e)
{
    //init();
    sql.Open();

    if (!Page.IsPostBack)
    {

        SqlCommand cmd = new SqlCommand("SELECT DISTINCT [value] FROM [table]", sql);
        SqlDataReader rdr = cmd.ExecuteReader();
        while (rdr.Read())
            chkLst.Items.Add(rdr[0].ToString());
        rdr.Close();
    }
    sql.Close();
}

Populating works perfectly. However, when I try to retrieve chkLst.Items.Selected property, it's always set to false, and thus renders the list useless for filtering. Below is the relevant segment of my code that executes on submit:

foreach (ListItem li in chkLst.Items)
    if (li.Selected)
        cmd += li.Text;

Since the Selected property is always false, my command always comes up empty. What can I do to fix this?

Answer 1

Someone else had answered my question, but it looks like his answer was deleted, either by him or SO's read-only period today.

The solution was to populate my list in Page_Init instead of Page_Load.

Thanks to the now anonymous respondent!