Sys.WebForms.PageRequestManagerTimeoutException: The server request timed out

[EVERIAL]

Good morning !

We are using a treeview for our Web Application.

This treeview is created from SQL requests.
On first load, I only load "visible" nodes (treeview is not expanded by default).

For example I load 3500 nodes (objects). And when the user expands a node, I call a new SQL request in order to display childs...
The matter is that sometimes, SQL request are a little important, and after around 1 minute the treeview timeout !

I have this error : Sys.WebForms.PageRequestManagerTimeoutException: The server request timed out.

Here is the definition of the treeview :

<telerik:RadTreeView ID="radTreeView" runat="server" CheckBoxes="True" CheckChildNodes="True"
                                Height="200px" MultipleSelect="True" OnNodeCheck="radTreeView_NodeCheck" OnNodeExpand="radTreeView_NodeExpand"
                                OnPreRender="radTreeView_PreRender" Skin="WebBlue" TriStateCheckBoxes="True" OnNodeClick="radTreeView_NodeClick"
                                Width="100%" meta:resourcekey="radTreeViewResource1">
                            </telerik:RadTreeView>

Can you please tell me how to avoid this timeout ?

Thanks and have a good day

[Kalina]

Hi Ibee,

Retrieving a large amount of data to populate a control has always been a tricky task.

The Sys.WebForms.PageRequestManagerTimeoutException is usually raised by the PageRequestManager class to return an error when an asynchronous postback has exceeded the specified time for processing.

You can optimize the RadTreeView performance using this online help article.
Additionally I can suggest you set the AsyncPostBackTimeout property of the script manager that you use to higher than the default value (the default value is 90 seconds) - please take a look at this MSDN article.
I hope this helps.

All the best,
Kalina
the Telerik team

[EVERIAL]

Ok thanks for the help !

I modified AsyncPostBackTimeout  of the script manager and so that I can now control this timeout...

And I am going to have a look to the optimizations of RadTreeView.

Warmly,
Jean

[Sunil]

Thanks
ScriptManager.GetCurrent(this).AsyncPostBackTimeout = 400;
This is worked.
But
In my case, am binding data to grid view(ASP .NET), it is very slow can u please suggest to increase the performance.

Yhanks