Silverlight Tip of the Day #13 - How to Get an Images Dimensions in Silverlight.

presentão de Ano Novo: dúzias de dicas e tutoriais de Silverlight ;)

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essa lista eu copiei desse blog bárbaro (acompanhe por RSS você também): uma lista de dicas super úteis

Silverlight Tips of the Day - Summary Outline

Silverlight Tips of the Day - Blog by Mike Snow — Fri, 02 Jan 2009 22:56:49 GMT

The purpose of this post is to create an outline summary all the blogs from my Silverlight tips of the

Quick Silverlight tip: Why my ActualWidth and ActualHeight equal 0? | Tamir Khason - Just code

Thu, 01 Jan 2009 08:54:00 GMT

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re: Silverlight Tip of the Day #13 - How to Get an Images Dimensions in Silverlight.

mike.snow — Mon, 03 Nov 2008 18:04:35 GMT

Hard to say looking at your code. If you zip up a sample project, email it to msnow at microsoft.com I will take a quick look at it for you.

Thanks,

--Mike

re: Silverlight Tip of the Day #13 - How to Get an Images Dimensions in Silverlight.

WzBn — Mon, 03 Nov 2008 15:33:40 GMT

Hi, thanks for the data, but I'm try to useit in the way below, but the event it is not fired.

Do you have any suggestion?

Thnaks in advance

Private Sub UpdateBackground(ByVal mmImg As System.IO.MemoryStream)

Try

Dim Img As New BitmapImage

Img.SetSource(mmImg)

Dim imbck As New Image

AddHandler Img.DownloadProgress, AddressOf BckgDonloadProgress

With imbck

.Source = Img

.HorizontalAlignment = HorizontalAlignment.Left

.VerticalAlignment = VerticalAlignment.Top

.Stretch = Stretch.None

End With

ThisPage.MainArea.Children.Add(imbck)

Catch ex As Exception

ThisPage.ShowError(ex)

End Try

End Sub

Public Sub BckgDonloadProgress(ByVal sender As Object, ByVal e As DownloadProgressEventArgs)

Try

If e.Progress = 1 Then

Dim Wd, Hg As Double

Wd = CDbl(CType(sender, BitmapImage).GetValue(Canvas.HeightProperty))

Hg = CDbl(CType(sender, BitmapImage).GetValue(Canvas.WidthProperty))

If ScreenCollection(CurrentScreen).Width < Wd Then ScreenCollection(CurrentScreen).Width = Wd

If ScreenCollection(CurrentScreen).Height < Hg Then ScreenCollection(CurrentScreen).Height = Hg

end if

Catch ex As Exception

ThisPage.ShowError(ex)

End Try

End Sub

???????????????????????????? ???????? ?????????????????? ???????????????? ???????? - ?????????? - ???????????? ????.????

Tue, 05 Aug 2008 03:20:58 GMT

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Quick Silverlight tip: Why my ActualWidth and ActualHeight equal 0?

Just Code - Tamir Khason — Sat, 12 Jul 2008 08:22:03 GMT

If you’ll try to use ActualWidth and ActualHight of controls with explicitly set Width and Height, you

Quick Silverlight tip: Why my ActualWidth and ActualHeight equal 0?

Just code - Tamir Khason — Sat, 12 Jul 2008 08:21:59 GMT

If you’ll try to use ActualWidth and ActualHight of controls with explicitly set Width and Height, you

re: Tip of the Day #13 - How to Get an Images Dimensions in Silverlight.

mike.snow — Fri, 11 Jul 2008 18:21:09 GMT

Rajeev- Yes, you may post. I added a link to your site from my "Silverlight Resources" section. Your site is great!

re: Tip of the Day #13 - How to Get an Images Dimensions in Silverlight.

RajeevGoel — Fri, 11 Jul 2008 17:40:19 GMT

Mike,

Great Tip of the Day. I've been trying to figure out how to do this for a while now.

Is it okay with you if I post this and other samples from your blog onto http://silverlightnuggets.com?

Thanks,

Rajeev

rgoel@silverlightnuggets.com

re: Tip of the Day #13 - How to Get an Images Dimensions in Silverlight.

Guillaume Andre — Tue, 08 Jul 2008 07:26:47 GMT

If you are in a Canvas you can also use SizeChanged event.

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re: Tip of the Day #13 - How to Get an Images Dimensions in Silverlight.

mike.snow — Tue, 01 Jul 2008 18:02:42 GMT

Hey Rob, when you retreive an image from a web server you will be creating the image locally correct? At this time you add theDownloadProgress event and then get its size. I might, however, be reading your question wrong. If you send me some sample code (msnow@microsoft.com) I can take a look for you.

As for your second question, until the image is actually added to the canvas it's not really loaded. I believe this is done to save memory and for better resource management.