Infragistics Forums

Hi Guys.

Am I missing something here? I have a WebCombo inside a Repeater control and in the Repeaters ItemDataBound Event I am adding 2 handlers.

AddHandler colourCombo.SelectedRowChanged, AddressOf wcmbAssocColours_SelectedRowChanged

AddHandler colourCombo.InitializeLayout, AddressOf wcmbColours_InitializeLayout

The InitializeLayout event triggers OK, but the SelectedRowChanged event doesn't trigger at all even though it is Posting back.

Any ideas?

Andy.

Hello Andy,

Thanks for writing. From what I see in the code you have pasted, everything seems perfect and is a good approach. Is it possible that something in the ASPX setup is missing? For example, have you set the AutoPostBack property of the combobox to true? If you paste your Repeater ItemTemplate with the combobox inside, this will certainly provide additional clues.

I also have one additional suggestion.- you can hook the event handlers directly on the combobox declaration, e.g.

...

<ItemTemplate>

    <igcmb:combobox runat="server" ID="..." OnSelectedRowChanged="..."  OnInitializeLayout="..."
 

</ItemTemplate> 

... 

Hi Rumen.

Thanks for replying.

Your sugestion to hook the handler in the aspx declaration works a treat.

 <igcmbo:WebCombo ID="wcmbAssocColours" runat="server" OnSelectedRowChanged="wcmbAssocColours_SelectedRowChanged"

But I can't figure out why adding the handler in the Repeaters ItemDataBound event works for the InitializeLayout event but not the SelectedRowChanged event even though it is causing a postback. I have used this approach many times without issue.

Anyway, many, many thanks for your help.

Andy.

Hello Andy,

Glad I was able to help and thanks for sharing the solution in forums - certainly will be helpful for other customer as well.

Just wanted to follow-up that I think I know what is going on under the hood and why SelectedRowChanged did not fire. This most probably has something to do with Page Lifecycle and events (Init, Load, PreRender, etc). Event handlers that are fired on postback like SelectedRowChanged need to be hooked in the OnInit state of the page (this is what the VS.NET designer does by default), whereas I believe in your case ItemBound for Repeater could be fired later on (by default it is in PreRender, if declarative datasource is used). This side-effect affects only SelectedRowChanged since it is a postback event, while InitializeLayout does not trigger postback - hence no problems.

The solution you are currently using seems to be the better one, if you do need to do it with code, you can force DataBinding the Repeater in the page OnInit event (by calling Repeater1.DataBind() explicitly in the OnInit event of the page) 

Hope this helps.

Hi Rumen.

That's makes sense, you're a star.

Thanks again.

 Andy