Hi all,
I'm beginning learn NHibernate. I write an application about Department, I assign all Department in TreeView if page not post back. When page post back, this TreeView disapear. I don't understand it?
This Code:

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
BindTreeView();
}

protected void BindTreeView()
{
//Some code NHibernate get TreeNode Department and assign in TreeView
}


Please help me!