You just have to wrap the code in `Page_Load` in a `!Page.IsPostBack`-check:
protected void Page_Load(object sender, EventArgs e) { if(!IsPostBack) { // code here that should be executed only at the first time // and not on consecutive postbacks } }
As suggested, you can also try `AppendDataBoundItems`

Use Page.IsPostback() in your aspx code (server-side). Like this:
private void Page_Load() { if (!IsPostBack) { // the code that only needs to run once goes here } }
This code will only run the *first* time the page is loaded and avoids stepping on user-entered changes to the form.