private void ParsePostbackData()
{
if (_postdata == null && this.Page.IsPostBack) {
var json = this.Page.Request.Form["__brewstate"];
if (!String.IsNullOrEmpty(json)) {
var js = new JavaScriptSerializer();
js.RegisterConverters(new JavaScriptConverter[] { new JavaScriptConverters.PostBackHashConverter() });
_postdata = js.Deserialize<List<PostBackHash>>(json);
}
}
if (_postdata == null) {
_postdata = new List<PostBackHash>();
}
}