PagedDataSource and UpdatePanel don't work together - asp.net

Question

I have a problem with PagedDataSource and UpdatePanel.When I use AsyncPostBackTrigger in my buttons, paging in my page disappear.
Here's asp code:
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:DataList ID="DataListGallery" runat="server" RepeatColumns="3" RepeatDirection="Horizontal" OnItemDataBound="DataListGallery_ItemDataBound" >
<ItemTemplate>
<asp:HiddenField ID="FieldPhoneId" Value='<%# Eval("Phone_InfoID") %>' runat="server" />
<asp:ImageButton ID="btnShop" OnClick="btnShop_Click" ImageUrl="images/cart.gif" CssClass="left_bt_item" title="header=[خريد] body=[ ] fade=[on]" runat="server" />
<asp:ImageButton CssClass="left_bt_item" title="header=[مورد علاقه] body=[ ] fade=[on]" OnClick="btnFavourite_Click" ID="btnFavourite" ImageUrl="images/unfav.png" runat="server" />
.
.
.
Here's C# code(load event):
protected void Page_Load(object sender, EventArgs e)
{
//http://www.aspdotnetfaq.com/Faq/how-to-determine-whether-an-asynchronous-partial-postback-has-occurred-on-page.aspx
// get a reference to ScriptManager and check if we have a partial postback
if (ScriptManager.GetCurrent(this.Page).IsInAsyncPostBack)
{
// partial (asynchronous) postback occured
// insert Ajax custom logic here
}
// enable property is re-creating page controls
else if (!Page.IsPostBack || enable)
{
//enable = false;
if (Page.Request["Page"] != null || Page.Request["Page"] != "")
{
.
.
.
And a button with AsyncPostBackTrigger:
protected void btnFavourite_Click(object sender, ImageClickEventArgs e)
{
// Access to real ImageButton from repeater
ImageButton ib = (ImageButton)sender;
HiddenField hf = (HiddenField)ib.Parent.FindControl("FieldPhoneId");
Favourite objFav = new Favourite(Convert.ToInt32(hf.Value));
Guid userId = objFav.GetUserIdFromUserName(User.Identity.Name);
using (var context = new MobileGalleryEntities())
{
try
{
// Delete favorited
if (objFav.HadFavorited(User.Identity.Name))
{
int phoneInfoId = Convert.ToInt32(Convert.ToInt32(hf.Value));
// Remove favourite
objFav.RemoveFromFavourite(userId);
// Change image
ib.ImageUrl = "~/images/unfav.png";
}
// Add favorite
else
{
// Add phone
objFav.AddToFavourite(userId);
// Change image
ib.ImageUrl = "~/images/favs.gif";
}
}
catch (Exception ex)
{
}
}
}
Here's DataBound event:
protected void DataListGallery_ItemDataBound(object sender, DataListItemEventArgs e)
{
if (User.Identity.IsAuthenticated)
{
try
{
// Get LoginView for access to ImageButton on it.
var loginView = e.Item.FindControl("LoginView1");
ImageButton btnCom = (ImageButton)e.Item.FindControl("btnCompare");
//ImageButton btnFav = (ImageButton)loginView.FindControl("btnFavourite");
ImageButton btnFav = (ImageButton)e.Item.FindControl("btnFavourite");
btnFav.Visible = true;
ImageButton btnShop = (ImageButton)e.Item.FindControl("btnShop");
btnShop.Visible = true;
//HiddenField hf = (HiddenField)loginView.FindControl("FieldPhoneId");
HiddenField hf = (HiddenField)e.Item.FindControl("FieldPhoneId");
List<int> listFav = (List<int>)Session["Fav"];
if (listFav.Contains(int.Parse(hf.Value)))
btnFav.ImageUrl = "~/images/favs.gif";
}
catch(Exception ex)
{
}
}
else
{
ImageButton btnFav = (ImageButton)e.Item.FindControl("btnFavourite");
btnFav.Visible = false;
ImageButton btnShop = (ImageButton)e.Item.FindControl("btnShop");
btnShop.Visible = false;
}
}
When I fire btnFavourite button, paging in my page disapear. but when i use FullPostBack it's work.
Notice that when I use FullPostBack, I re-create controls such as paging control and other control but when I use AsyncPostBackTrigger I didn't re-create controls.
What am I doing?
Thanks.

Answer 1

I have to re-create controls again the same as FullPostBack.