WPF Discussion Boards

Pete O'Hanlon17-Aug-09 22:41

17-Aug-09 22:41

An easy way to do this is to specify a Uri to the image as in the following code:

myImage.BeginInit();
myImage.Source = new BitmapImage(new Uri(file));
myImage.EndInit();

Obviously, you'll have to pass the fully qualified file name into the Uri, but this code will work.

"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.

Wolfram Steinke18-Aug-09 14:15

Wolfram Steinke

18-Aug-09 14:15

How does one go about putting it on the button?
It must be possible but documentation on this topic worse than ever and impossible to find.

Happy programming!!

Christian Graus18-Aug-09 15:24

Christian Graus

18-Aug-09 15:24

There same property you set in XAML, you can set in code.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Pete O'Hanlon18-Aug-09 21:42

18-Aug-09 21:42

It's not that hard to do, and there are plenty of samples on the web. Your XAML looks like this:

<Button>
  <Image x:Name="myImage" />
</Button>

"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.

Wolfram Steinke19-Aug-09 1:43

Wolfram Steinke

19-Aug-09 1:43

Thanks for your assistance.
There are heaps of examples that load images from embedded resources for sure. So far I have found only one that half works the way I need it to work.

Happy programming!!

Pete O'Hanlon19-Aug-09 2:22

19-Aug-09 2:22

I'm glad I could help then.

"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.

WPF user interface stored in DB

Paint.Net for WPF

sufiyan_ansari117-Aug-09 6:27

sufiyan_ansari1

17-Aug-09 6:27

Hi,

How do I import the DLL Libraries and of Paint.Net and use them in my WPF Application?
Paint.Net is an Open Source Program and it comes bundled with the DLL Libraries but when i try loading them in the WPF/VS08/VS10 it says cannot load the DLL.

Thank You,
Cheers.

Re: Paint.Net for WPF

Christian Graus17-Aug-09 16:54

Christian Graus

17-Aug-09 16:54

What does it say EXACTLY ?

You're not going to be able to do what you're trying to do, in any case.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

kstxx17-Aug-09 0:49

kstxx

17-Aug-09 0:49

Hi.

I have a strange problem to solve. I am new in WPF. I have a gruop of people(admins) who can modify user interface by Visual Studio and we have group who do not have Visual Studio installed and they are not programmers or admins but they should have a ability to modify user interface - the question is how to do that. Can we store user interface made by Visual Studio in database? Can we make own application which can be used just like Visual Studio by people who are not admins or programmers - this app should load interface from DB and modify it and then save it back to the DB. In this app I need drag/drop functionallity, toolbox with controls loaded from DB and Canvas on which user will modify interface. Finally user can save his work to DB and programmers should have ability to load this interface and open it in Visual Studio.

regards

Re: WPF user interface stored in DB

Pete O'Hanlon17-Aug-09 1:13

17-Aug-09 1:13

mpiotrek wrote:
Can we store user interface made by Visual Studio in database?

You could, as long as the UI is done entirely in XAML this isn't too hard to achieve. If you use a pattern like MVVM (google it), you don't need to put code behind the view at all. Alternatively, these users could use Expression Blend which was designed for just this task.

"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.

Re: WPF user interface stored in DB

kstxx17-Aug-09 1:19

kstxx

17-Aug-09 1:19

Ok. I understand. Interface would be in XAML. But what with events for example ondrag, onclick etc. Is this a big deal?

Re: WPF user interface stored in DB

Pete O'Hanlon17-Aug-09 1:36

17-Aug-09 1:36

Take a look at MVVM - you can separate your logic out into something called a ViewModel. I wrote an article[^] a couple of months ago that used MVVM and there's virtually no code behind the views. Download it, read through the code, and read up on the pattern. Sacha Barber's currently running a series on MVVM in WPF that is well worth reading, and you can find more information from the likes of Josh Smith and Karl Shifflett.

"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.

Calling IContextMenu with a WPF ContextMenu - need HMENU

seguso16-Aug-09 22:38

seguso

16-Aug-09 22:38

Hi,

I am writing a WPF application (www.tabbles.net) with file managament capabilities. I need to show the same file context menus that Explorer does. I assume I have to query all shell extensions installed on the user's machine. In particular, for each shell extension, I have to invoke IContextMenu::QueryContextMenu[^]. The problem is that QueryContextMenu requires an HMENU as argument, but I am using the WPF ContextMenu class, which does not seem to have a method for obtaining an HMENU. How can I obtain the required HMENU to pass to the QueryContextMenu? Thanks a lot for any solution or workaround to my problem.

modified on Monday, August 17, 2009 5:09 AM

Re: Calling IContextMenu with a WPF ContextMenu - need HMENU

Pete O'Hanlon16-Aug-09 23:22

16-Aug-09 23:22

HMENU is actually a handle to the menu. In order to get a handle, you need to wrap your context menu in a HwndSource object, which gives you the handle you need.

"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.

Applying a selection effect on 3D models

Etienne_12316-Aug-09 7:01

Re: Applying a selection effect on 3D models

16-Aug-09 7:01

Hi Guys

I want to add a selection effect to my 3d models so that when I select a model it fades to another color, and when deselecting it, it should fade back to it's original color again. The idea I have is to create a Storyboard, and somewhere in the code behind start the Storyboard when a certain model is selected, but, how would I go about specifying the actual fade effect e.g brown to red?

Pete O'Hanlon16-Aug-09 9:35

16-Aug-09 9:35

You could do this using a ColorAnimationUsingKeyFrames as in the following sample:

<Window
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  x:Class="FadeSample.Window1"
  x:Name="Window"
  Title="Window1"
  Width="640" Height="480">
  <Window
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  x:Class="FadeSample.Window1"
  x:Name="Window"
  Title="Window1"
  Width="640" Height="480">
  <Window.Resources>
    <Storyboard x:Key="OnClick1">
      <ColorAnimationUsingKeyFrames 
        BeginTime="00:00:00" Storyboard.TargetName="button" 
        Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)">
        <SplineColorKeyFrame KeyTime="00:00:01" Value="#FFEF1407"/>
      </ColorAnimationUsingKeyFrames>
    </Storyboard>
  </Window.Resources>
  <Window.Triggers>
    <EventTrigger 
      RoutedEvent="ButtonBase.Click" SourceName="button">
      <BeginStoryboard Storyboard="{StaticResource OnClick1}"/>
    </EventTrigger>
  </Window.Triggers>

  <Grid x:Name="LayoutRoot">
    <Button 
      HorizontalAlignment="Left" 
      VerticalAlignment="Top" 
      Content="Button" 
      RenderTransformOrigin="3.339,5.055" 
      Margin="120,115,0,0" 
      Background="#FFDF891A" 
      x:Name="button"/>
  </Grid>
</Window>

"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.

Re: Applying a selection effect on 3D models

Etienne_12317-Aug-09 7:07

Re: Applying a selection effect on 3D models

17-Aug-09 7:07

Thanks for the code sample, appreciate it very much.
Will try it as soon as possible and report back

Etienne_12318-Aug-09 4:55

Need help with styling a groupbox

18-Aug-09 4:55

Okay I understand how this works, but in the sample you gave me the Storyboard.TargetProperty is = (Panel.Background). How would I specify the animation to applied to a ModelVisual3D(3D model) instead? Also remember, the ModelVisual3D's aren't specified in the xaml, it get's rendered at runtime.

Etienne_12315-Aug-09 9:50

Re: Need help with styling a groupbox

15-Aug-09 9:50

Hi
I defined a Style in my xaml to be used on all Groupboxes, but there's ONE groupbox's background property that has to be different from the others. I tried setting this property in the code behind, but no luck. Any ideas?

Here's the code for the style:

<!--A style that formats all groupboxes--><br />
       <Style TargetType="GroupBox"><br />
           <Setter Property="Template"><br />
               <Setter.Value><br />
                   <ControlTemplate TargetType="GroupBox"><br />
                       <Grid><br />
                           <Grid.RowDefinitions><br />
                               <RowDefinition Height="Auto"/><br />
                               <RowDefinition Height="*"/><br />
                           </Grid.RowDefinitions><br />
                           <Border Grid.Row="0" BorderBrush="White" BorderThickness="2,2,2,1" CornerRadius="0,12,0,0" ><br />
                               <ContentPresenter Margin="4" ContentSource="Header" RecognizesAccessKey="True" /><br />
                           </Border><br />
                           <Border Grid.Row="1" BorderBrush="White" BorderThickness="2,0,2,2" CornerRadius="0,0,0,12" ><br />
                               <ContentPresenter Margin="4" /><br />
                           </Border><br />
                       </Grid><br />
                   </ControlTemplate><br />
               </Setter.Value><br />
           </Setter><br />
       </Style>

Pete O'Hanlon15-Aug-09 10:56

15-Aug-09 10:56

If all you need to do is have one groupbox that behaves slightly differently to the others in it's styling, all you need to do is create a new style that targets a groupbox, and give it a key. By default, (as long as you add it after the groupbox above) it will inherit the settings of the groupbox, and you can change the background property as appropriate. All you need do then is apply the style to the groupbox in question - you have the key to use 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.

Re: Need help with styling a groupbox

Etienne_12315-Aug-09 21:42

Re: Need help with styling a groupbox

15-Aug-09 21:42

"All you need do then is apply the style to the groupbox in question - you have the key to use here. "

This is exactly my question, how do I apply this specific style to the specific groupbox?

Etienne_12315-Aug-09 22:06