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Infragistics WebDataGrid stalls on paging large datasets

By , 06/25/2014 4:12 PM

A common scenario while using Infragistics WebDataGrid is to have an unbound column, whose cell’s value is determined at runtime in InitializeRow event, something like

Private Sub xmyGrid_InitializeRow(ByVal sender As Object, ByVal e As GridControls.RowEventArgs) Handles xmyGrid.InitializeRow
   '... some code
   e.Row.Items(0).Value = SomeCalculatedData
   '... some more code
End Sub

This works fine if you bind the grid to a small data set (and you should!) But if, due to circumstances out of your control, you bind it to a dataset with tens of thousand of records you might be screwed. Even if you enable paging (and you most definitely should!) you may find yourself living in a shotgun shack in a situation that changing page takes forever and eventually crashes. If you do – change the above line to

e.Row.Items(0).Text = SomeCalculatedData

note using of .Text property, which is String, instead of .Value which is Object. Since you’re assigning the calculated data for presentation only – no need to change underlying value – and this makes all the difference.

Flipping pebbles

By , 06/25/2014 3:31 PM

Big Flip Clock

As far as smartwatches go – Pebble is a lot of fun. But after playing around with Watchface Generator, Canvas for Pebble and numerous other apps I wanted something more, something that only Pebble SDK could provide. A coder in me wanted to code.

Enter CloudPebble – an amazing online development environment that runs in your browser, has a full-blown C compiler and connects to your watch to run/debug compiled apps. Plus your projects are stored on the cloud and available anywhere you can get online.

Yes you program Pebble in classic C – and it’s a lot of fun. And my first real attempt at custom watchface (pictured above) is old-style flip clock, you can get it here. It is based on amazing pebble bitmap library by Gregoire Sage

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