Performance - Memory Usage - WPF Discussion Boards

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Re: WPF ComboBox

mark_w_21-Apr-09 22:33

mark_w_

21-Apr-09 22:33

Many thanks for your reply.

That still does not do what i want, i am starting to think that i am going about this the wrong way Frown | :(

Put simply what i need is a combobox with a datasource of list of my objects (all the same type). Then when the form loads i want the combobox to have preselected an object of my choice (what ever was saved in xml/db)

I am new to wpf and the mvvm pattern, and this is getting a bit frustrating!!

ps for info i changed the colour class to the following as the other throw an exception

public class Colour
{
   public string Description { get; set; }
    public override bool Equals(object obj)
    {
        if(obj.GetType()== typeof(Colour))
        return this.Description == ((Colour) obj).Description;

        return base.Equals(obj);
    }

    public override int GetHashCode()
    {
        return base.GetHashCode() ^ this.Description.GetHashCode();
    }


}

Analog CLock in WPF

kiemchung20-Apr-09 0:57

kiemchung

20-Apr-09 0:57

I want creat a Analog Clock in WPF. Help me! Please, Thanks so much.

Re: Analog CLock in WPF

Pete O'Hanlon20-Apr-09 1:32

Pete O'Hanlon

20-Apr-09 1:32

A simple search would have found this[^].

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

My blog | My articles | MoXAML PowerToys | Onyx

Throwing videos using Silverlight

pavanip19-Apr-09 20:24

pavanip

19-Apr-09 20:24

Hi,

I am developing one application using silverlight and .Net.There are some videos to watch.There are some features like rotate,scaling video using silverlight.Now I want to develop feature Throw videos using silverlight like in the following site.
http://www.etsy.com/color.php?ref=fp_nav_colors.If u open that link there are some bubbles,if you click those bubles you will find some images.In that we can throw those images to anywhere. I want to develop that feature using silverlight in my site.Can please anyone help me how to do that task using silverlight and .Net.

Thanks in advance
Pavani

Re: Throwing videos using Silverlight

Michael Sync23-Jul-09 20:47

Michael Sync

23-Jul-09 20:47

pavanip wrote:
Can please anyone help me how to do that task using silverlight and .Net.

you can consider hiring some Silverlight consultants to get it done.

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

Microsoft MVP (Silverlight), WPF/Silverlight Insiders

CFormView in WPF

Member 377636719-Apr-09 18:13

Member 3776367

19-Apr-09 18:13

I have a MFC dll, which one inherit the CFormView and I add a textbox in that FormView. I want to load that dll from WPF and display it in the window as a control. If anyone have an idea about this, please help me.

Re: CFormView in WPF

Pete O'Hanlon19-Apr-09 21:52

Pete O'Hanlon

19-Apr-09 21:52

Why would you want to do this? It's easy enough (i.e. trivial) to do exactly this in WPF, so why would you want to go to all the trouble of adding in an external DLL to do this? BTW - I'm not the one who voted 1.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

My blog | My articles | MoXAML PowerToys | Onyx

Performance - Memory Usage

Jammer19-Apr-09 9:24

Jammer

19-Apr-09 9:24

Hi All,

I've just started looking into this in relation to an app I've made. It's a fairly simple app, most of the pages just have a handful of controls (the main one being Infragistics Grid) spread over a few pages. The app has been designed and implemented using Prism (Composite).

When I first launch the app I'm seeing nearly 60Mb of ram in use before the application has opened any data files. I'm currently going through the WPF Performance Suite tools to see what this shows up. Any tips would be good!

Anyone else experiencing anything like this with their apps?

Jammer
My Blog | Article(s)

Re: Performance - Memory Usage

Roman Lerman20-Apr-09 22:14

Roman Lerman

20-Apr-09 22:14

It is normal. See comments here.[^]

Re: Performance - Memory Usage

Jammer21-Apr-09 8:26

Jammer

21-Apr-09 8:26

Interesting comments. I had bookmarked that article but it had slipped my mind, thanks for pointing me to it.

Jammer
My Blog | Article(s)

Databinding in UserControl [modified]

mikla52119-Apr-09 6:43

mikla521

19-Apr-09 6:43

I'm stuck (as usual).
A have a user control with 6 textboxes. But to make it easier, I'm trying to break down the problem a bit and lets say there is one textbox.
USERCONTROL1.XAML:CS

public partial class AttenuationBox : UserControl
{ 
    private String justAtest;
    public String ATest { get { return justATest; } set { ...

    public String LowChRx
    {
        get { return tbLowChRX.Text; }
        set { tbLowChRX.Text = value; }
    }
...
}

USERCONTROL1.XAML

<textbox name="tbLowChRX" text="{Binding Path=ATest}"></textbox>

Now I want tbLowChRX to be bound to justAtest. But just can't get it to work. Must be something I have missed in Source or Path or...

modified on Sunday, April 19, 2009 12:49 PM

Re: Databinding in UserControl

Mark Salsbery19-Apr-09 7:44

Mark Salsbery

19-Apr-09 7:44

You will need to make sure the source is right on the binding.

Here's a simple example of one way to do it:
WPF: Binding to Properties in your UserControl or Window[^]

I'm not sure why you'd want to bind directly to the field, nor do I think
you can, but you should be able to bind to the ATest property. Of course, for
change notifications when the property is updated, you may want to make that a
dependency property.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Databinding in UserControl

mikla52119-Apr-09 18:38

mikla521

19-Apr-09 18:38

Oh, my fault, the intention was to bind to the property Smile | :)

Re: Databinding in UserControl

Mark Salsbery19-Apr-09 19:13

Mark Salsbery

19-Apr-09 19:13

Then that example at the link works... Smile | :)

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Error

Saiyed Alam18-Apr-09 5:43

Saiyed Alam

18-Apr-09 5:43

Hello Friends I am getting these errors in my wpf application. Any help would be appreciated as I am totally new to this environment/

Error 1 'System.Windows.Data.BindingListCollectionView' does not contain a definition for 'AddNew' and no extension method 'AddNew' accepting a first argument of type 'System.Windows.Data.BindingListCollectionView' could be found (are you missing a using directive or an assembly reference?) D:\Other\Personal\WPF\Tutorial\Windows Client\Zip Files\Wpf-Data-MasterDetail_CS\WpfMasterDetail_CS\WpfMasterDetail_CS\Window1.xaml.cs 77 29 WpfMasterDetail_CS

Error 2 'System.Windows.Data.BindingListCollectionView' does not contain a definition for 'CommitNew' and no extension method 'CommitNew' accepting a first argument of type 'System.Windows.Data.BindingListCollectionView' could be found (are you missing a using directive or an assembly reference?) D:\Other\Personal\WPF\Tutorial\Windows Client\Zip Files\Wpf-Data-MasterDetail_CS\WpfMasterDetail_CS\WpfMasterDetail_CS\Window1.xaml.cs 78 29 WpfMasterDetail_CS

Error 3 'System.Windows.Data.BindingListCollectionView' does not contain a definition for 'RemoveAt' and no extension method 'RemoveAt' accepting a first argument of type 'System.Windows.Data.BindingListCollectionView' could be found (are you missing a using directive or an assembly reference?) D:\Other\Personal\WPF\Tutorial\Windows Client\Zip Files\Wpf-Data-MasterDetail_CS\WpfMasterDetail_CS\WpfMasterDetail_CS\Window1.xaml.cs 89 29 WpfMasterDetail_CS

Error 4 'System.Windows.Data.BindingListCollectionView' does not contain a definition for 'AddNew' and no extension method 'AddNew' accepting a first argument of type 'System.Windows.Data.BindingListCollectionView' could be found (are you missing a using directive or an assembly reference?) D:\Other\Personal\WPF\Tutorial\Windows Client\Zip Files\Wpf-Data-MasterDetail_CS\WpfMasterDetail_CS\WpfMasterDetail_CS\Window1.xaml.cs 121 29 WpfMasterDetail_CS

Error 5 'System.Windows.Data.BindingListCollectionView' does not contain a definition for 'CommitNew' and no extension method 'CommitNew' accepting a first argument of type 'System.Windows.Data.BindingListCollectionView' could be found (are you missing a using directive or an assembly reference?) D:\Other\Personal\WPF\Tutorial\Windows Client\Zip Files\Wpf-Data-MasterDetail_CS\WpfMasterDetail_CS\WpfMasterDetail_CS\Window1.xaml.cs 122 29 WpfMasterDetail_CS

Error 6 'System.Windows.Data.BindingListCollectionView' does not contain a definition for 'RemoveAt' and no extension method 'RemoveAt' accepting a first argument of type 'System.Windows.Data.BindingListCollectionView' could be found (are you missing a using directive or an assembly reference?) D:\Other\Personal\WPF\Tutorial\Windows Client\Zip Files\Wpf-Data-MasterDetail_CS\WpfMasterDetail_CS\WpfMasterDetail_CS\Window1.xaml.cs 129 33 WpfMasterDetail_CS

Load MFC CFormView from WPF

Member 377636718-Apr-09 0:17

Member 3776367

18-Apr-09 0:17

Re: Load MFC CFormView from WPF

Mark Salsbery19-Apr-09 7:54

Mark Salsbery

19-Apr-09 7:54

It's not going to be simple if you don't have a good grasp on native/managed interop
and initialization/use of MFC DLLs.

Here's a couple starting places...

Kinds of DLLs[^]

WPF and Win32 Interoperation Overview[^]

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Tabcontrol layout with Prism

Abhinav S17-Apr-09 20:00

Abhinav S

17-Apr-09 20:00

I am implementing a scenario where I'm loading 3 or 4 views inside the tabcontrol. My tabcontrol region is defined using the TabControlRegionAdapter. I am able to load these views into this region without any problems. However, I am unable to control the layout of the tab control once these views get loaded. Thus my views scroll out of my page (so to speak) and are not visible on the screen. I understand that the tab control uses ItemsControl to display its content. I tried defining the layout using ItemsTemplate but even that seemed to have no effect.

How can I control the layout of the content inside a tab so that all my views can be completely visible on the screen? Also, is there a solution such that as I resize my browser, this content too gets automatically resized? In my present scenario, as I resize my window, more and more of my view content gets clipped.

Thanks for any help or guidance in advance.

Unselect text in textbox on textbox lostfocus event.

pc.rajesh.singh17-Apr-09 4:45

pc.rajesh.singh

17-Apr-09 4:45

I am working in WPF. Normally on lost focus of textbox , text are unselected. But if I set the value e.handled = true on lostfocus event handler, unselection doesn't happen. I need to set e.handled = true to prevent the event from bubbling up. Note: I am not stopping from lostfocus being triggered. LostFocus takes place, its just that, automatic unselection doesn't happen and I want the unselection to take place.

Private Sub MyTextBox_LostFocus(ByVal sender As Object, ByVal e As RoutedEventArgs)
e.Handled = True
End Sub

Re: Unselect text in textbox on textbox lostfocus event.

sivaddrahcir20-Apr-09 7:26

sivaddrahcir

20-Apr-09 7:26

Try setting the TextBox.SelectionLength property to 0 in your LostFocus handler method.

Blog:
http://windowsclientdevelopment.spaces.live.com
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Re: Unselect text in textbox on textbox lostfocus event.

pc.rajesh.singh23-Apr-09 23:53

pc.rajesh.singh

23-Apr-09 23:53

Well setting that only leaves the textedit cursor blinking in the text box even after lost focus. I have already tried via default selection property settings e.g selectionlength or selectionstart, all results in setting the cursor blinking in the text box even if the next control get focus. Just tab through the text box and see the behviour of the cursor on txtFirst and txtSecond
< textbox x:name="txtTest" lostfocus="txtFirst_LostFocus" xmlns:x="#unknown" / >
< textbox x:name="txtFirst" lostfocus="txtFirst_LostFocus" xmlns:x="#unknown" / >
< textbox x:name="txtSecond" lostfocus="txtSecond_LostFocus" xmlns:x="#unknown" / >
< textbox x:name="txtFourth" xmlns:x="#unknown" / >

Private Sub txtFirst_LostFocus(ByVal sender As Object, ByVal e As RoutedEventArgs)
e.Handled = True
End Sub

Private Sub txtSecond_LostFocus(ByVal sender As Object, ByVal e As RoutedEventArgs)
e.Handled = True
End Sub

Re: Unselect text in textbox on textbox lostfocus event.

sivaddrahcir24-Apr-09 7:58

sivaddrahcir

24-Apr-09 7:58

I see what you are saying about the caret staying in the TextBox that looses focus. Try setting the IsEnabled property to False and then True again after you set e.Handled = True. That seems to make the caret go away for me.

Blog:
http://windowsclientdevelopment.spaces.live.com
FAQs:
http://windowspresentationfoundation.wikispaces.com
http://windowsmobile.wikispaces.com
http://vsto.wikispaces.com

How to download file from a physical location in Silverlight? urgent.........

salon17-Apr-09 3:49

salon

17-Apr-09 3:49

Hi all,

I want to download xml or any other file from physical location like C:\Documents and Settings\All Users\Documents\Test.xml and open a Save Dialog box to allow user to save it in desired location

Is it possible in Silverlight 2.0?
Can we do it in xaml.cs file?
If yes then plz share the code with me.....
Its very urgent.........

Thanks in advance,

Re: How to download file from a physical location in Silverlight? urgent.........

Mark Salsbery17-Apr-09 8:42

Mark Salsbery

17-Apr-09 8:42

salon wrote:
Is it possible in Silverlight 2.0?

Opening a file you can do using the OpenFileDialog class, so the user
effectively needs to give permission first.

Saving a file, no, not in Silverlight 2.

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: How to download file from a physical location in Silverlight? urgent.........

Braulio Dez17-Apr-09 9:01

Braulio Dez

17-Apr-09 9:01

Another option (not elegant but works) could be to perform a ping pong using services:

- Send your file to the server again using a WCF service, store it in session.
- Call a javascript method from SL that will make a request to a custom HTTP hanlder.
- That custom HTTP hanlder would return the file that was in session as an attachment (first time the nasty bar from IE would appear... you are going to download something...).

In my application I needed to export a DB Diagram to JPEG and to perform an export as well to an HTML report, I used that approach (ping pong Smile | :)

), I could set an attribute (attachment) and IE would ask me to save the JPEG as a file.

If you want to take a look at how it behaves:

http://www.dbschemaeditor.com

HTH Braulio

/// -------------------------
     Braulio Díez

     DBSchemaEditor.com
     Free Silverlight based DB Schema Modeling Tool
/// -------------------------

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