Hi,

which event of the AspxGridView can I use to make sure at any time the key of a selected row had been written to a (http)Session variable?  

I have tried to use the BeforePerfomDataSelect as wel as the focusRowChanged and to override the DataBind, but I still have the problem that when the grid is loaded for the first time I have no key written to the Http Session.

I use the pager and have the AllowFocusedRow=true;

Thanks,

Albert Jan

Hello Albert,

I'm not sure I understand the scenario. Can you describe it in more detail and perhaps upload a sample please?

Also, you might consider using the ASPxClientGridView.SelectionChanged Event on the client side to invoke CustomCallBack.

Thanks.

Hi Mehul,

In many places in my application I use controls that should display content related  to the selected row in the gridviews. So I have inherited the Gridview, and I want the GridView to save the keyvalue of the selected row to the Http session.

This works fine when the user has realy clicked a row, but when the page is first loaded, the gridview shows  the first line as being selected, but on the serverside I haven't been able to set the key to a session variable. So when the user moves to a different (part of the) page the information displayed is not related to the selected row.

The example included performs a custom callback when the second tab is chosen. This works when the user has selected a row, but fails when the user immediately clciks the orders tab.

 

Thanks

 

Albert Jan

Hello Albert,

Take a look at this tutorial that maintains the focused rows even between page changes. If the session variable is null then it select the first row but perhaps you can save this somewhere and reload it if it's null:

Enable one row selection in the grid with Radiobuttons

Thanks.

Hi Mehul,

Thanks for your answer. However the given example still depends on the user to click the row. This also works in my solution. But when in my solution the page is just opened the gridview displays the first row as being selected(the first row has the focus). Without the user selecting a row the information on the server should be consistent with the page displayed and therefore the server should 'know' the keyvalue of the row that seems to be selected (and have it stored as Session variable).

 

Thanks

 

Albert Jan

Hi Mehul, 

"but perhaps you can save this somewhere and reload it if it's null:" 

I don't understand this part of your anwer. How should I do this? 

Thanks,

Albert Jan

Hi Albert,

The next major ASPxGridView version (7.3) will contain the
SettingsBehavior.ProcessFocusedRowChangedOnServer property. If you set it
to true, a callback(postback) will be sent to the server once a focused row
is changed and thus you will be able to trap this moment and save the
focused row key value to a session variable.

For now, to resolve the problem, you may handle the FocusedRowChanged server
side event. It will be triggered when the current page is changed or the
grid is loaded for the first time.

Thanks,
Plato

Developer Express Support

Great to head the new version will have this event!

Thank you for your help,

Albert Jan

Hello Albert,

You can download the beta for 2007 vol 3 now if you're a DXperience customer:

http://www.devexpress.com/Products/NET/DXperience/WhatsNew2007v3/index.xml

Thanks.