Re: WPF custom control - WPF Discussion Boards

DahrkDaiz29-Jun-09 5:16

29-Jun-09 5:16

I have a "Queue Editor" user control that keeps a list of queues. I have an Add button that's attached to a CreateQueue Command. This binding works great. However, I have a combo box in a separate place of the application that has a current list of available queues. The first item in the list, when selected, should fire the CreateQueue command.
I can't seem to figure out how to manually fire the command. I tried using the Execute method, but it requires the target UIElement, which to me seems pointless considering that routed commands are "supposed" to touch all the controls and only be handled by those controls that care about it. The other problem is that combo box in question does not, nor should it, know about the Queue Editor else where in the application. Any advice?

Re: Manually firing WPF RoutedCommand

Pete O'Hanlon29-Jun-09 6:06

Pete O'Hanlon

29-Jun-09 6:06

DahrkDaiz wrote:
Any advice?

Yes. Don't use a routed command - use a Mediator instead. It's far more lightweight, and you can see a sample in action in my Twitter application here[^].

"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

Re: Manually firing WPF RoutedCommand

User 27100929-Jun-09 15:48

User 271009

29-Jun-09 15:48

You can use an attached behavior to execute the command.

Download this code from Jaime's and my training sessions.

http://www.cookingwithxaml.com/content/ChicagoLob/demos.zip[^]

Look in the Southridge project for the RibbonTabSelectedBehavior.

Then modify it for your purposes. You can also do a search on "wfp attached behaviors" and read up on these.

Cheers, Karl

» CodeProject 2008 MVP, CodeProject 2009 MVP

My Blog | Mole's Home Page |
XAML Power Toys Home Page

Just a grain of sand on the worlds beaches.

modified 27-Feb-21 21:01pm.

Message Removed

29-Jun-09 4:54

N_tro_P

29-Jun-09 4:54

Message Removed

Re: Images and Namespaces

Gideon Engelberth29-Jun-09 6:29

Gideon Engelberth

29-Jun-09 6:29

You should be able to say Source="../Images/Img.png"

This is not a namespace problem perse, just one that looks like it because of the way most people group their files into namespaces combined with how the XAML compiler/parser compiles and looks up resources.

WPF custom control

Vinod C S29-Jun-09 4:21

Vinod C S

29-Jun-09 4:21

Hi,
I am developing WPF custom controls. My problem is how can get an event when the user has deleted a control from the Cider (WPF designer). The Unloaded event is triggered for a control when its deleted from cider and also when the WPF Window is closed. I want a event which is fired only when a control is deleted from cider.

// Register the callback for the control Unload event 
// This Callback is called for control deletion and when the WPF window(.XAML) 
// is closed in cider.               
this.Unloaded += new RoutedEventHandler(ControlUnloadedCallBack);
.
.
.
 private void FSFControlUnloaded(object sender, RoutedEventArgs e) {
   // notification called
   }

thanks in advance,
Vinod C S

Re: WPF custom control

Christian Graus29-Jun-09 11:13

Christian Graus

29-Jun-09 11:13

You can detect in code if you are in the designer, so put your code inside the event inside a block so it doesn't fire at runtime.

Christian Graus

Driven to the arms of OSX by Vista.

"! i don't exactly like or do programming and it only gives me a headache." - spotted in VB forums.

I can do things with my brain that I can't even google. I can flex the front part of my brain instantly anytime I want. It can be exhausting and it even causes me vision problems for some reason. - CaptainSeeSharp

Re: WPF custom control

Vinod C S29-Jun-09 19:42

Vinod C S

29-Jun-09 19:42

Hi,
Thanks for the answer.
but what I want to know is the exact event name which gets triggered when the control is deleted from the cider. can you tell the exact event which gets triggered?

Thanks,
vinod

Eliminating The standard shape of a bitmap(actually xaml based) button, How to :)?

cppwxwidgetsss29-Jun-09 1:12

cppwxwidgetsss

29-Jun-09 1:12

Hi I am new in WPF so in advance I apologize if it is just a simple question
I have a vector based (actually xaml based) image in the resources
and I want to have a button that just contain that image
and I don't want to have a button that just contain that image ,I want a button that does n't have the traditional standard shape of a button, I mean I want a BitmapButton only a bitmap I want to appear instead of button , nothing else
I have a code that do this but still show that standard view that I don't like
Please Tell me what should I do to eliminate that.
Thank you
P.S
Here is the code:

<Button Grid.Row="5" Height="75" Width="220" Padding="2" >
          <ContentControl Template="{StaticResource Credit-Card}" />
      </Button>

Re: Eliminating The standard shape of a bitmap(actually xaml based) button, How to :)?

Mark Salsbery29-Jun-09 6:41

Mark Salsbery

29-Jun-09 6:41

You'll probably want to change the template of the button to give it a different
layout. The section "Creating a ControlTemplate" in the Controls Overview[^]
has an example.

Mark

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

How can I use Application Idle Event in WPF?

Kunal Chowdhury «IN»28-Jun-09 23:00

Kunal Chowdhury «IN»

28-Jun-09 23:00

Hi,

Is there any way to use the Application Idle event in WPF? I want to display a message when the application goes to idle period of over 5 minutes. How can I achieve this? I am using WPF (C#) 3.5 SP1. Please guide me.

Regards,
- Kunal Chowdhury (My Blog)

Re: How can I use Application Idle Event in WPF?

Christian Graus28-Jun-09 23:32

Christian Graus

28-Jun-09 23:32

Idle in what way ?

Re: How can I use Application Idle Event in WPF?

Kunal Chowdhury «IN»29-Jun-09 2:15

Kunal Chowdhury «IN»

29-Jun-09 2:15

idle means => user is not doing anything using any input (like: keyboard or mouse etc.). He is not using the machine for a long period (say about 5 minutes)

Regards,
- Kunal Chowdhury (My Blog)

Re: How can I use Application Idle Event in WPF?

Ravi Mori29-Jun-09 2:40

Ravi Mori

29-Jun-09 2:40

I can give you some hint..hope this help you..
Make some global variable say 'xyz' in app.xaml and initialize it to 0.

and take one timer whose code executes after each minute and increase value of variable 'xyz' by 1 and if it become 5, then write code what you want..

and for anything you do using keyboard or mouse input at that time make the value of 'xyz' to 0..

Re: How can I use Application Idle Event in WPF?

Kunal Chowdhury «IN»29-Jun-09 3:44

Kunal Chowdhury «IN»

29-Jun-09 3:44

Dear Ravi,
Thanks for the suggestion. Actually I was not in desk at that time when u pinged me. I will check the same & will inform u tomorrow . Thanks again.... Smile | :)

Regards,
- Kunal Chowdhury (My Blog)

Re: How can I use Application Idle Event in WPF?

Kunal Chowdhury «IN»29-Jun-09 20:02

Kunal Chowdhury «IN»

29-Jun-09 20:02

Ravi,
I checked the same. This will not help me in my case.

ravimori wrote:
for anything you do using keyboard or mouse input at that time make the value of 'xyz' to 0..

This will be quite difficult if I use two many Windows in my application. This will also produce huge garbage code.... Frown | :(

Lets see.... if anyone has any solution for that....
Hope, will get the answer soon.... Smile | :)

Regards,
- Kunal Chowdhury (My Blog)

Need some feed back on my new Silverlight articles

ProtoBytes28-Jun-09 16:43

ProtoBytes

28-Jun-09 16:43

Hi,

I just completed two articles on Silverlight. The first is real basic 1.0 stuff. The second is 2.0 and more architechuraly involved but geard toward developers. I would like some community feed back and any performance results you find while testing the code. I am working on an older Pentuim 4 willimina with low memory. I'm getting bad performance results, I'd like to know what beefier systems report.

Thanks in Advance,

~TheArch

Re: Need some feed back on my new Silverlight articles

ProtoBytes28-Jun-09 16:46

ProtoBytes

28-Jun-09 16:46

~err!

The Link!

XAML Graphics Series - Part 2 Silverlight 2.0 Desktop Art Animation[^]

Silverlight 3 Offline Application from Notification Area

nmreddy8328-Jun-09 8:11

nmreddy83

28-Jun-09 8:11

I am curious to put my Out Of Browse application in Notification Area (Tray Icon). Especially when user minimizes my Out of Browser applications it should keep one ICON in Notification Area. Once he gets some alert or To-Do operation, it will show one “Notification Window” (like Outlook New Mail Notification Window). Is it possible to these kind of operations in Silverlight

Re: Silverlight 3 Offline Application from Notification Area

Mark Salsbery29-Jun-09 9:29

Mark Salsbery

29-Jun-09 9:29

I'm pretty sure the trust restrictions of Silverlight apps
will prevent you from using the system tray.

Mark

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

Re: Silverlight 3 Offline Application from Notification Area

nmreddy8329-Jun-09 12:24

nmreddy83

29-Jun-09 12:24

thank you Mark,
Can we customize Silverlight by extending dll's or can we use any third party controls to take care of Tray Area from Silverlight Out Of Browser application..

I am looking for these from long time, I believe once we get these futures we can do lot for our clients.

thank you,
-nm reddy

Re: Silverlight 3 Offline Application from Notification Area

Mark Salsbery29-Jun-09 13:43

Mark Salsbery

29-Jun-09 13:43

Silverlight is a browser plugin and thus is meant to be cross-platform compatible.

The notification area is Windows specific. It's unlikely we'll see this
feature in Silverlight any time soon.

You should use WPF for full trust, full .NET framework features.

Mark

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

Re: Silverlight 3 Offline Application from Notification Area

Pete O'Hanlon29-Jun-09 21:35

Pete O'Hanlon

29-Jun-09 21:35

You can't do this because Silverlight is meant to respect the security Sandbox of the browser. That means that there are lots of operations you can't do such as interact with the desktop or file system outside of Isolated Storage. This is important because it helps to protect you from downloading malicious content from outside sources.

If you need desktop interaction, write a WPF application and download it using Click Once.

"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

WPF MediaElement to play a UDP Stream

jklanka27-Jun-09 21:00

jklanka

27-Jun-09 21:00

Hi All,

I am streaming a video using a VLC player swith UDP option. So that I can open the stream from any other PC's VLC player using the URL. For example udp://@239.239.239.1:1234

But I am trying WPF MediaElement to open the stream and it is not working with a xaml file. Please help me how I can I play a VLC stream on a XAML file.

Thanks

jklanka

Re: WPF MediaElement to play a UDP Stream

Christian Graus28-Jun-09 10:33

Christian Graus

28-Jun-09 10:33

The MediaElement control, is basicallly Windows Media Player under the hood. So, if WMP can't play it, neither can the MediaElement.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.