WPF Discussion Boards

Re: How to stretch Colum header in WPF datagrid?

Pete O'Hanlon27-Jul-10 0:30

27-Jul-10 0:30

I haven't tried it, but I should imagine that all you need to do is set a style with a TargetType of tk:DataGridColumnHeader, and set the TextWrapping in there.

"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

How to bind the Stackpanel object into ListView

DavJes26-Jul-10 2:00

DavJes

26-Jul-10 2:00

Hi ,

In WPF, am trying to create ListView, Which binds with list of class KPI objects. Where the KPI class contains Name(string), StackPanel(which contains TextBlock + Image).

I want to show only the StackPanel into the list , not the Name property. How do we bind the stack panel object alone .

<listview name="lvKPI" grid.row="1" margin="5,5,5,78"
="" selectionmode="Single" itemssource="{Binding KPICollection}" itemcontainerstyle="{StaticResource alternatingListViewItemStyle}" alternationcount="2">
<listview.view>
<gridview.columns>

Re: How to bind the Stackpanel object into ListView

Michael Eber27-Jul-10 17:38

Michael Eber

27-Jul-10 17:38

you need to define the stackpanel in a column template.

Re: How to bind the Stackpanel object into ListView

DavJes4-Aug-10 21:41

DavJes

4-Aug-10 21:41

Hi,

thanks. Can u pl help me here giving me example for this ?

thanks

Re: How to bind the Stackpanel object into ListView

Michael Eber5-Aug-10 7:08

Michael Eber

5-Aug-10 7:08

Here you go

Removing specific object from a container and add it to another

sadas232341s24-Jul-10 3:48

sadas232341s

24-Jul-10 3:48

I figured out how to see if an object within a container is a specific object, but how to translate it to another container? The following doesn' t work.

foreach (UIElement el in LayoutRoot.Children)
{
    if (el is Button)
    {
        LayoutRoot.Children.Remove(el);
        StackPanel1.Children.Add(el);
    }
}

Re: Removing specific object from a container and add it to another

Parwej Ahamad24-Jul-10 7:30

Parwej Ahamad

24-Jul-10 7:30

As per my understadning, it is containing reference of button so it may be the cause.

Try with following DeepCopy approach:

foreach (UIElement el in LayoutRoot.Children)
{ 
   if (el is Button) 
   { 
        string shapestring = XamlWriter.Save(el);  
        StringReader stringReader = new StringReader(shapestring);
        XmlTextReader xmlTextReader = new XmlTextReader(stringReader);
        UIElement DeepCopyobject = (UIElement)XamlReader.Load(xmlTextReader);
        StackPanel1.Children.Add(DeepCopyobject); 
        LayoutRoot.Children.Remove(el);           
   }
}

If it is not working or if you have any other approach then please let me know.

Thanks,

Parwej Ahamad
ahamad.parwej@gmail.com

Re: Removing specific object from a container and add it to another

Michael Eber27-Jul-10 12:10

Michael Eber

27-Jul-10 12:10

If you run that code in debug mode you WILL experience an exception.
You cannot remove an item from a collection that is being enumerated. So what I do in that case is this:

List<int> itemsToRemove = new List<int>();
for ( int index = 0; index<LayoutRood.Children.Count; index++ )
{
      if ( LayoutRoot.Children[index] is Button )
           itemsToRemove.Add(index);
}
// Next process the items to move
foreach ( int element in itemsToRemove )
{
   Button oldElement = LayoutRoot.Children[element] as Button;
   LayoutRood.Children.RemoveAt(element);
   StackPanel1.Children.Add(oldElement);
}

Take this one warning into account: you MIGHT get an exception that the element is already a member of another collection. The exception will point at your StackPanel1 add to the elements. If that happens then do the following:

Button newElement = new Button;
newElement.Name = oldElement.Name;
     .
     .
     .
// you get the idea
// now add the new instance of the button to the collection

Data binding to static resource: shown to work in VS but not when run

Jonathan Davies24-Jul-10 2:36

Jonathan Davies

24-Jul-10 2:36

Hi,
I'm following a Data Binding example from: microsoft[^] which displays the expected result in the VS2008 design window on XP but not when I run it. The XML looks OK to me with the XMLDataProver in a Resource :

<XmlDataProvider x:Key="MoreColors" XPath="/colors">

and the ListBox attribute :

ItemsSource="{Binding Source={StaticResource MoreColors}, XPath=color/@name}">

, any ideas why it displays data in the ListBox in design mode in VS2008 but doesn't display any data in the ListBox when its run?

<Window x:Class="WpfText2LableBinding.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">

    <StackPanel>
        <StackPanel.Resources>
            <XmlDataProvider x:Key="MoreColors" XPath="/colors">
                <x:XData>
                    <colors >
                        <color name="pink"/>
                        <color name="white"/>
                        <color name="black"/>
                        <color name="cyan"/>
                        <color name="gray"/>
                        <color name="magenta"/>
                    </colors>
                </x:XData>
            </XmlDataProvider>
        </StackPanel.Resources>

        <TextBlock Width="248" Height="24" Text="Colors:" TextWrapping="Wrap"/>

       <ListBox x:Name="lbColor" Width="248" Height="56" IsSynchronizedWithCurrentItem="True" 
            ItemsSource="{Binding Source={StaticResource MoreColors}, XPath=color/@name}">
       </ListBox>
            
    </StackPanel>
</Window>

Re: Data binding to static resource: shown to work in VS but not when run

Pete O'Hanlon24-Jul-10 4:25

Pete O'Hanlon

24-Jul-10 4:25

I answered this here[^]. Add the namespace I mention in the answer and you are good to go.

"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: Data binding to static resource: shown to work in VS but not when run

Jonathan Davies24-Jul-10 7:18

Jonathan Davies

24-Jul-10 7:18

Thanks, you identified the cause though I think your linked solution is wrong (in this case anyway). It's now working but I had to use:

<br />
           <x:XData><br />
                    <colors xmlns=""><br />

rather then the

<br />
           <x:XData xmlns=""><br />
                    <colors ><br />

in your link. I found another MS example which uses xmlns in this manner:

<StackPanel.Resources>
    <XmlDataProvider x:Key="InventoryData" XPath="Inventory/Books">
      <x:XData>
        <Inventory xmlns="">
          <Books>
            <Book ISBN="0-7356-0562-9" Stock="in" Number="9">
              <Title>XML in Action</Title>
              <Summary>XML Web Technology</Summary>
            </Book>

User Control Height is 0 before its drawn to screen.

Poohshoes23-Jul-10 15:33

Poohshoes

23-Jul-10 15:33

Hey Guys,

I am drawing custom user controls onto a Canvas using a placement algorithm, the problem is that when the placement algorithm runs the controls Height has not yet been calculated and is 0 causing other object around it to be placed invalidly, how can I get it so that the height is set before I run my placement algorithm?

Cheers,
Ian

Re: User Control Height is 0 before its drawn to screen.

Kunal Chowdhury «IN»24-Jul-10 4:44

Kunal Chowdhury «IN»

24-Jul-10 4:44

Hi Ian,

You can set a fixed height and width to your UserControl and then you will have the ActualHeight property set to it before drawing it to the screen.

Don't forget to Click on [Vote] and [Good Answer] on the posts that helped you.

Re: User Control Height is 0 before its drawn to screen.

Poohshoes26-Jul-10 4:38

Poohshoes

26-Jul-10 4:38

Do you mean that I set the User Controls .Width and .Height properties?

Re: User Control Height is 0 before its drawn to screen.

Kunal Chowdhury «IN»26-Jul-10 5:04

Kunal Chowdhury «IN»

26-Jul-10 5:04

Yes, you have to set the height & width of the UserControl in the XAML itself, else it will set after rendering.
Have a look into the following code snippet for setting the dimension of the control:

<UserControl ...
             ...
             Height="200" Width="400">



</UserControl>

Don't forget to Click on [Vote] and [Good Answer] on the posts that helped you.

Re: User Control Height is 0 before its drawn to screen.

Poohshoes26-Jul-10 8:18

Poohshoes

26-Jul-10 8:18

But the control is created programmatically in code.

Re: User Control Height is 0 before its drawn to screen.

Kunal Chowdhury «IN»26-Jul-10 8:29

Kunal Chowdhury «IN»

26-Jul-10 8:29

If you created it programmatically, then use the following way to set the height & width of the usercontrol:

MyUserControl uc = new MyUserControl();
uc.Height = 200.0;
uc.Width = 400.0;
...
...
...
LayoutRoot.Children.Add(uc);

Let me know, if you have any queries.

Don't forget to Click on [Vote] and [Good Answer] on the posts that helped you.

WPF controls on web [modified]

Prasoon Chaudhary22-Jul-10 21:58

Prasoon Chaudhary

22-Jul-10 21:58

I've developed several WPF controls and themes, and would like to showcase them. I've created another WPF application which contains them all, which works fine. Now, I want to put those controls onto web. Is it possible without re-writing the whole code for Silverlight? I've few problems due to Silverlight restrictions. I am using 3.5 framework.

Also, can we edit/create a Silverlight project in Visual C# 2008 express edition?

modified on Friday, July 23, 2010 5:13 AM

Re: WPF controls on web

Jammer27-Jul-10 0:49

Jammer

27-Jul-10 0:49

WPF != Silverlight ... ish! Wink | ;)

You need Web Developer Express to do Silverlight ...

Jammer
My Blog | Articles | DMon | SampleSort

Re: WPF controls on web

Jugortha27-Jul-10 13:20

Jugortha

27-Jul-10 13:20

You can create a WPF Bowser application an XBAP
http://www.xbap.org/tutorial.html

Every one among us was a beginner once

Re: WPF controls on web

Pete O'Hanlon27-Jul-10 21:50

Pete O'Hanlon

27-Jul-10 21:50

That's not, actually, a good suggestion - while you can create a WPF browser app, it's not going to run on certain browsers, and not on a Mac or Linux box. This limits the target audience who can view what he's done.

"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

Binding ListBoxes to Calender

carrigart22-Jul-10 14:38

carrigart

22-Jul-10 14:38

Hi,
Looking for a bit of help. I have two listboxes and a calender control.
One listbox contains different years (2010,2011,2012 etc) and my other listbox contains the months of the year. What I'm trying to do is bind what is selected in the listboxes and then display the correct month and year. I have the binding setup for one direction.
My calender xaml looks as follows

<calender>
<calender.displaydate>
<multibinding converter="{StaticResource myConverter}">
<binding elementname="lstYears" path="SelectedItem">
<binding elementname="lstMonths Path=" selecteditem"="">

My converter class is as follows

Public Class ListBoxToDateConverter
Implements IMultiValueConverter

Public Function Convert(ByVal values() ....etc
Dim year As ListBoxItem = CType(values(0), ListBoxItem)
Dim month As ListBoxItem = Ctype(values(1), ListBoxItem)

' Create my date object from the data and return it ....
.
.
.
return date
End Function

Anyways I dont know how to do the ConvertBack() function. Kinda lost as what to do. Any help would be appreciated

A weird WPF build-time error [modified]

makumazan8422-Jul-10 4:26

makumazan84

22-Jul-10 4:26

I have a xaml file, which has a codeline, something like.

xmlns:a="http://schemas.someadress.com/bla/bla/bla" - the name is defined in an assembly which contains that desired namespace.

Above mentioned namespace contains a class, that I'd like to use in my xaml. But I cannot build the project with this file, bc Visual Studio throws me an error
"The tag '<my class="" name="">' doesn't exist in a namespace "http://schemas.someadress.com/bla/bla/bla" Line A Position B"

Interesting enough, that the intellisence can see that class in "a:" - when I start typing it pops up the class that I need. Adress "http://schemas.someadress.com/bla/bla/bla" is correct - I've copypasted it from an assemblyinfo. Besides, other xaml files in a project can perfectly use that specific class from that assembly.

Note, that this question comes from a WPF noobie, and can sound dumb. Still, I've spent more than an hour and ran out of ideas.
Any help will be greatly appreciated.

Thanks in advance
------------
UPDATE: I got this one figured. The problem was that the project's compilation settings were set for .NET Framework 4.0 Client Profile. Once I switched to a regular 4.0, everything got fixed

modified on Friday, July 23, 2010 9:12 AM

Unable to read bmp and gif files in Silverlight [modified]

yogesh_kumar_agarwal21-Jul-10 23:48

yogesh_kumar_agarwal

21-Jul-10 23:48

<br />
                        BitmapImage imageSource = new BitmapImage();<br />
                        Stream stream = fu.File.OpenRead();<br />
                        BinaryReader binaryReader = new BinaryReader(stream);<br />
                        byte[] currentImageInBytes = binaryReader.ReadBytes((int)stream.Length);<br />
                        stream.Position = 0;<br />
                        imageSource.SetSource(stream);<br />
                        imagePreview.Source = imageSource;<br />
<br />

catastrophic failure error occoured,Plz help

HI after a lot of RND i got something like imagetool on codeplex did anyone has some idea how to use the same.

HI All its done, my problem is been resolved now, I used imagetool classes to convert gif and bmp files, but still looking for TIFF decoder, did any one have teh solution for the same????

Thanks

modified on Friday, July 23, 2010 12:13 AM

Trouble testing Custom Installation screen [modified]

vikas amin21-Jul-10 8:21

vikas amin

21-Jul-10 8:21

My friend had trouble testing Custom Installation screen for silverlight application then we found
out a nice way to debug/test is disabling the plugin. Have posted on my blog an article about Silverlight(.NET 3.0) it is about how to test Silverlight Installation Screen.

http://avikas.blogspot.com/2010/07/test-silverlight-installation-screen.html

Vikas Amin
Credit Suisse

-- Modified Wednesday, July 21, 2010 4:44 PM

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