Re: wpf xbap listbox problem - WPF Discussion Boards

float Dependency Property Exception

17-Apr-08 18:26

Uros,

give this a try and post the results. Change the Opacity of all controls to 100%. Ensure that you are not using any BitMapEffects and lets us know how the animation works.

Cheers, Karl

» CodeProject 2008 MVP
» Microsoft MVP - Client App Dev

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modified 27-Feb-21 21:01pm.

RNEELY17-Apr-08 9:33

RNEELY

17-Apr-08 9:33

Please help me resolve the exception that get's thrown below when I try to run an app with one simple float dependency property. It is a default WPF window app with the following added to Window 1 to create a float dependency property:

<br />
    public partial class Window1 : Window<br />
    {<br />
        public Window1()<br />
        {<br />
            InitializeComponent();<br />
        }<br />
        public static readonly DependencyProperty DependFloatProperty =<br />
            DependencyProperty.Register("DependFloat",<br />
            typeof(float),<br />
            typeof(Window1),<br />
            new UIPropertyMetadata(0.0));<br />
        public float DependFloat<br />
        {<br />
            get { return (float)GetValue(DependFloatProperty); }<br />
            set { SetValue(DependFloatProperty, value); }<br />
        }<br />
    }<br />

Following is the xaml:

<br />
<Window x:Class="Dependent.Window1"<br />
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"<br />
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"<br />
    Title="Window1" Height="300" Width="300"><br />
    <Grid><br />
    </Grid><br />
</Window><br />

When I run the app I get the following exception:
System.Windows.Markup.XamlParseException was unhandled
Message="Cannot create instance of 'Window1' defined in assembly 'Dependent, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. Exception has been thrown by the target of an invocation. Error in markup file 'Window1.xaml' Line 1 Position 9."
Source="PresentationFramework"
LineNumber=1
LinePosition=9
...

Sincerely,
-Ron

Re: float Dependency Property Exception

Pete O'Hanlon17-Apr-08 9:55

17-Apr-08 9:55

Your dependency property is declared incorrectly. Basically, it's not seeing the 0.0 as a float. Try replacing it with

public static readonly DependencyProperty DependFloatProperty =
    DependencyProperty.Register("DependFloat",
    typeof(float),
    typeof(Window1),
    new UIPropertyMetadata((float)0));

Deja View - the feeling that you've seen this post before.

Re: float Dependency Property Exception

RNEELY17-Apr-08 10:00

RNEELY

17-Apr-08 10:00

Yes that worked. Thanks. Smile | :)

Sincerely,
-Ron

wpf xbap listbox problem

pat3d216-Apr-08 9:03

pat3d2

16-Apr-08 9:03

Hi,

I have created a listbox with items in XAML file using VS2008. (for a WPF Browser application)
I'm selecting a item with the mouse, and when I'm using the up and down keys of the keyboard and reach the top or the bottom of the listbox, it goes out the listbox.

Is there a way not to leave the listbox ?

I hope I'm clear enough in my explanation.

If anyone can help.

Thanks in advance,

Pat3d

My code:

<Page xmlns:my="clr-namespace:System.Windows.Shapes;assembly=PresentationFramework" x:Class="WpfBrowserStyleTest.Page1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:dropShadow="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero"
Title="Page1" Width="562" ShowsNavigationUI="False">
<Grid Height="263" Width="488">
<Grid.RowDefinitions>
<RowDefinition Height="176.346*" />
<RowDefinition Height="86.654*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="325.422*" />
<ColumnDefinition Width="162.578*" />
</Grid.ColumnDefinitions>
<dropShadow:SystemDropShadowChrome Color="#71000000" Margin="0,0,0,79.083" HorizontalAlignment="Left" Width="159.984">
<ListBox SelectionMode="Multiple" IsTabStop="False">
<ListBoxItem>test</ListBoxItem>
<ListBoxItem>test2</ListBoxItem>
<ListBoxItem>test3</ListBoxItem>
<ListBoxItem>test4</ListBoxItem>
<ListBoxItem>test</ListBoxItem>
<ListBoxItem>test2</ListBoxItem>
<ListBoxItem>test3</ListBoxItem>
<ListBoxItem>test4</ListBoxItem>
</ListBox>
</dropShadow:SystemDropShadowChrome>
<Button Grid.Column="1" Height="23" Margin="40.905,50.245,46.359,0" Name="button1" VerticalAlignment="Top">Button</Button>
</Grid>
</Page>

Re: wpf xbap listbox problem

RNEELY18-Apr-08 4:48

RNEELY

18-Apr-08 4:48

Try

<br />
<ListBox SelectionMode="Multiple" KeyboardNavigation.DirectionalNavigation="Cycle"><br />

Sincerely,
-Ron

Re: wpf xbap listbox problem

pat3d223-Apr-08 7:27

pat3d2

23-Apr-08 7:27

Thanks Ron,

It's working fine with KeyboardNavigation.DirectionalNavigation="Cycle"

Pat

Problem with UserControl [modified]

koleraba14-Apr-08 15:23

koleraba

14-Apr-08 15:23

Hi everybody

I have a problem, for which, I don't seem to find the answer
I Created a User Control, in wpf. In that control I defined a Dependency Property as(all the smaller than signs are replaced with '[', and grater than signs are replaced with ']'):

public static DependencyProperty ItemsProperty = DependencyProperty.Register("Items", typeof(ObservableCollections[SomeClass]), typeof(MyUserControl), new PropertyMetadata(new ObservableCollection[SomeClass]);

I also implemented the standard Getter / Setter for that property as

public ObservableCollection[SomeClass] Items
{
get{return (ObservableCollection[SomeClass])GetValue(ItemsProperty)};
set{SetValue(ItemsProperty, value);}
}

In the constructor of the user control I subscribe to the CollectionChanged event as:

public MyUserControl()
{
InitializeComponent();
Item.CollectionChanged += new NotifyCollectionChangedEventHandler(items_CollectionChanged);
}

and in the event handler I have the code that does what is needed

private void items_CollectionCHanged(object sender, NotifyCollectionChangedEventArgs e)
{
//Build control foreach item in e.NewItems and add them to UI and remove from UI controls foreach item in e.OldItems
}

I add UserControls to my window as follows:
[StackPanel]
[local:MyUserControl]
[local:MyUserControl.Items]
[local:SomeClass .... /]
[local:SomeClass .... /]
[/local:MyUserControl.Items]
[/local:MyUserControl]
[local:MyUserControl]
[local:MyUserControl.Items]
[local:SomeClass .... /]
[local:SomeClass .... /]
[local:SomeClass .... /]
[local:MyUserControl.Items]
[local:MyUserControl]

[/StackPanel]

From the start everything worked fine, but if I add two or more instances of MyUserControl, to the window, the first instance is OK, but the other one contains also the items that was defined in the first one. For the example above one of the UserControls whould have 2 instances of control that is build in the CollectionChanged event handler, and the other one would have 5 of them. Does anybody know how to solve this problem. Any advice will be appriciated!

Uroš

<div class="ForumMod">modified on Monday, April 14, 2008 9:33 PM</div>

Re: Problem with UserControl

Insincere Dave14-Apr-08 16:33

Insincere Dave

14-Apr-08 16:33

The problem is that the dependency property is static, therefore the default value only gets initialized once and the same collection is used for all the controls. In the dependency property use the default null and create the collection in the constructor.

See http://msdn2.microsoft.com/en-us/library/aa970563.aspx

Re: Problem with UserControl

koleraba15-Apr-08 0:11

koleraba

15-Apr-08 0:11

Great. That solved my problem. Thanks

Photo Gallery using Silver light

r aa j14-Apr-08 3:43

r aa j

14-Apr-08 3:43

hi,

anybody know how to get the photo gallery using silver light

plz reply me...

Rajendran.AL

Re: Photo Gallery using Silver light

Michael Sync14-Apr-08 17:53

Michael Sync

14-Apr-08 17:53

Hello,

Have you tried using this project[^]? It seems pretty nice..

There are a lot of samples in Silverlight Gallery[^]. You can probably find the sample that you want.

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

Re: Photo Gallery using Silver light

r aa j15-Apr-08 18:16

r aa j

15-Apr-08 18:16

thanks alot.

Rajendran.AL

How can i use DataGridView in WPF Application?

bankey101011-Apr-08 1:24

bankey1010

11-Apr-08 1:24

Hi All,

I want to use DataGridView which should be editable in my WPF application.
In Form Base application we can simply use DataGridView But here i am
unable to use it, what cade i have to written in XAML.
So Please any body suggest me what i have to do to use DataGridView in WPF.

Thanks
Bankey

User 27100911-Apr-08 2:02

11-Apr-08 2:02

Bankey,

You can download and use distribute for free, the datagrid controls from eXceed or Infragistics.

You can also write you own, depending on how much functionality you require.

Cheers, Karl

» CodeProject 2008 MVP
» Microsoft MVP - Client App Dev

My Blog | Mole's Home Page | MVP Profile

Just a grain of sand on the worlds beaches.

modified 27-Feb-21 21:01pm.

Pete O'Hanlon11-Apr-08 3:13

11-Apr-08 3:13

Karl Shifflett wrote:
You can also write you own, depending on how much functionality you require.

It's surprising that more people don't do this - considering how easy it is to extend and restyle controls like the ListView.

Deja View - the feeling that you've seen this post before.

Pete O'Hanlon11-Apr-08 2:23

11-Apr-08 2:23

If you don't want to download something like the Infragistics or Exceed grids (and really you should look at them - they are very good), you could always host the WinForms DataGridView.

If you're running VS 2008, the steps to do this are:

1. Reference System.Windows.Forms and WindowsFormIntegration in your project.
2. Add a WindowsFormsHost element to your XAML and put the grid inside

:<WindowsFormsHost Height="100" Width="200">
    <wf:DataGridView x:Name="dg" />
</WindowsFormsHost>

3. Add the following declaration to your XAML:

xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"

Deja View - the feeling that you've seen this post before.

User 27100911-Apr-08 3:32

11-Apr-08 3:32

Pete,

I'll be off line starting tomorrow and will be back on line 28 April.

I'll try and gets of pictures. I didn't get any at MIX08 so I guess I should for this trip.

Cheers!!!

Karl

Cheers, Karl

» CodeProject 2008 MVP
» Microsoft MVP - Client App Dev

My Blog | Mole's Home Page | MVP Profile

Just a grain of sand on the worlds beaches.

modified 27-Feb-21 21:01pm.

Pete O'Hanlon11-Apr-08 4:11

11-Apr-08 4:11

Karl Shifflett wrote:
I'll try and gets of pictures. I didn't get any at MIX08 so I guess I should for this trip.

Cool. I'll try to hold the fort here while you're away Big Grin | :-D

Enjoy your trip.

Deja View - the feeling that you've seen this post before.

User 27100911-Apr-08 4:30

11-Apr-08 4:30

Pete O'Hanlon wrote:
I'll try to hold the fort

When they starting piling up, remember the Alamo! Do leave you post!! LOL...

Josh & I have classes together over there will be a great time!

Thanks! Cool | :cool:

Cheers, Karl

» CodeProject 2008 MVP
» Microsoft MVP - Client App Dev

My Blog | Mole's Home Page | MVP Profile

Just a grain of sand on the worlds beaches.

modified 27-Feb-21 21:01pm.

Pete O'Hanlon11-Apr-08 4:51

11-Apr-08 4:51

Karl Shifflett wrote:
Josh & I have classes together over there will be a great time!

I'm jealous. I bet that's one hell of a time.

Deja View - the feeling that you've seen this post before.

User 27100911-Apr-08 3:31