RadGrid Q1 2009 PageSizeChanged event issue.

[PPSDevs]

I am using RadGrid Q1 2009 in my application. I have set the pagesize of the grid to 50. While running the application, when I change the pagesize to 10 or 20, the OnPageSizeChanged event doesn't fire. As a result of this, the grid is not binding to the datasource and the grid doesn't show up.

However, if I set the pagesize to 10, then on changing the page size, then OnPageSizeChanged event gets fired appropriately.

Can anyone tell me what am I doing wrong or how to get around this problem.

[Todd Anglin]

Hello Manjeet-

Sorry to hear about your trouble. Are you using a declarative data source with your RadGrid or are you doing custom ("advanced") data binding? If you're using data source controls, you shouldn't need to interact with the PageSizeChanged event. Changing the page size should happen automatically without issue. 

That said, I have observed some strange behavior with the PageSizeChanged event. It seems there are some scenarios when this event is not firing. In my own tests, when the initial page size was 5 and I changed it to 10, the event did not fire. When initial size was 20 and I changed it to 10, the event did not fire. When the initial size was 20 and I changed it to 50, though, the event did fire! Same with 10 to 20. Not sure why this behavior is inconsistent.

My paging worked, of course, despite the strange event firing because of the data source controls. If you're not using a data source control, I expect you may be having more trouble. I'd suggest opening a support ticket and reporting the (seeming) bug so that the support team can log-it for an upcoming service pack.

-Todd

[Kevin Jones]

I have the exact same problem.  Does anyone know of a solution?

[Pavel]

Hi guys,

Indeed the problem can be observed with the latest official release. I have informed our developers about this issue and they will hopefully fix it for the upcoming service pack (scheduled for release in the beginning of April). Please excuse us for the temporary inconvenience. I have updated your Telerik points for your feedback.

Kind regards,
Pavel
the Telerik team

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[Sivaparamesh]

Could you please let me know if this problem is resolved and patch has been release or not ?

[Pavel]

Hi Sivaparamesh,

Indeed the problem is fixed in our latest release. You can refer the the following article for details on the easiest way to upgrade.

Regards,
Pavel
the Telerik team

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[Vadimko]

Hi Pavel

Good 1 April joke! 2009.
I faced the same problem with 2010.2.826.35.
Consider the markup:

<telerik:RadGrid ID="rgd" runat="server" AllowPaging="true" AllowSorting="True" AutoGenerateColumns="False"
OnNeedDataSource="rdGrid_NeedDataSource" OnPageSizeChanged="rdGrid_OnPageSizeChanged"
OnItemDataBound="rdGrid_ItemDataBound" OnSortCommand="rdGrid_SortCommand"
PagerStyle-Mode="NextPrevAndNumeric">

The rdGrid_OnPageSizeChanged handler is never called.
The POST request is executed on "Page size" RadComboBox change,
__EVENTARGUMENT= FireCommand:rgd$ctl00;PageSize;50
__EVENTTARGET= rgd
OnLoad and other page methods are executed but not that one.
NeedDataSource is called initially and on prev, next, page button clicks.

So if the page size feature is not working, how to hide it?
Besides the NextPrevAndNumeric mode name is wrong since it must display only Next, Prev and page buttons, but no page size!

Thank you
Vadim

[Pavel]

Hello Vadimko,

I am attaching a test page which is working as expected on my end with our latest release. Let us know how to modify it in order to replicate the undesired behavior you are experiencing.

Regards,
Pavel
the Telerik team