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You're welcome.
"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
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I've got two groups in my datagrid. First one is the main group and the second is the subgroup, what I want to do is hide the Main group and just show the subgroups in my data grid. Here is the code:
ListCollectionView collection = new ListCollectionView(bdata);
collection.GroupDescriptions.Add(new PropertyGroupDescription("tid"));
collection.GroupDescriptions.Add(new PropertyGroupDescription("PkgName"));
dataGrid1.ItemsSource = collection;
Any help would be great.
Thanks
Salman
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Hi,
In my silverlight page i took silver light control : MenuControl 's MenuBar and a image. At run time the menubar's list is hiding back to the image, how to make it view the menubarlist forward of the image at run time.Please suggest me .
With Regards,
CH.Gayatri
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In your xaml, set the canvas.zindex property to a higher value (than the image) for the menubarlist control.
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Hi all,
I have a canvas ( naming cn ) with MouseButtonDown event, i also have three textblocks in it.
When i press a textblock in canvas, the event is raised with the sender is canvas ( of course ).
How could i get the name of clicked-textblock ?
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Check out the original source property of the event and see if it contains that text block.
For more information, see here[^].
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I solve it.
Thank you for your support !
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I am somewhat new to WPF and am loving the data binding, but it seems that I am still having a little bit of a rough time getting some things to work, one being this issue. I currently have an object that has a "Name" member variable as well as a few other member variables which I have made public accessors for. I then poulated a global List of these objects from a tab delimited file.
I now have a listbox in my main window that I want to databind to the "Name" variable of each object listed in my List<> of these objects. In my XAML I currently have the below code where m_netObjArr is my global List<networkidobject> which for each of my NetworkIDObjects I want to access their "Name" accessor.
<ListBox Height="Auto" Name="lbNetSelect" Width="Auto" MouseRightButtonDown="lbNetSelect_MouseRightButtonDown"
SelectionChanged="lbNetSelect_SelectionChanged" ItemsSource="{Binding ElementName=window1.m_netObjArr, Path=Name }"/>
Any help or direction would be great! Thanks everyone!
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1. What is m_netObjArr?
2. If it is a member variable, then is it a public variable?
Variable in a class has to bound like,
{Binding ElementName=window1, Path=m_netObjArr.Name}
or
{Binding ElementName=window1, Source=m_netObjArr, Path=Name}
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m_netObjArr is my public global List<> of my NetworkIDObjects: m_netObjArr<networkidobjects>
NetworkIDObjects is an object containing a number of variables that I populate from an XML file. I want to populate my Listbox with the "Name" variable value for each of the NetworkIDObjects in my List<networkidobjects> and I do have a public accessor for Name. Thanks for your time!
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You can bind the list box to the collection and set the display member path property to the property name wich is name in this case and you will have all names displayed in the list
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Dear friends,
I have wpf application
i could double click on the exe and N number of instance, but i want only one application to run.
how to do that?
any idea? suggestion?
Thank You
Joe.I
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You have to take over the creation of the main form yourself, rather than using the StartupUri. A common way to do this is, in the OnStartup, detect whether or not another instance of the application is running by using a system wide mutex. Here's an example that does a basic level of checking:
private Mutex _mutex;
private override OnStartup(StartupEventArgs e)
{
_mutex = new Mutex(false, @"Global\\MyApplicationIdentifier");
if (_mutex.WaitOne(0, false))
{
base.OnStartup(e);
}
else
{
Application.Current.Shutdown();
}
}
"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
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Thanks Pete O'Hanlon,
It works fine.
Thank you
by
Joe
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Joe - you're welcome. Glad to help.
"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
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you have to implement the singleton pattern in this case
move the startupuri attribute form the app.xaml and make the constructor of the statup window as private
then define a static method within the form and instanciate that form within that static method
private LunchWindow()
{
InitializeComponent();
}
static public LunchWindow Singleton()
{
return new LunchWindow();
}
override the OnStartup method of the app.cs and call that static method within the scope of the on startup method
public partial class App : Application
{
protected override void OnStartup(StartupEventArgs e)
{
LunchWindow singleInstance = LunchWindow.Singleton();
singleInstance.Show();
}
}
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BechBej wrote: you have to implement the singleton pattern in this case
Errm, no you don't. Unless I am missing something really basic here, a singleton has no effect in this case because the singleton is per application domain.
The generally accepted way to do this is to use a Mutex to determine whether or not there is an instance of the application currently running.
"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
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I have a WPF app (that I didn't write - I just have the "pleasure" of fixing). The StartupUri in the app.xaml references mainwindow.xaml. But for some reason, I have a completely different page BasicView.xaml that is getting loaded first, prior to the MainWindow. Any idea what could be causing this?
Thanks
Phil
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Check what's in your code behind App.xaml.cs.
"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
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Check the code behind at the two levels at the app.cs and at the Mainwindow.cs then tell me whether is there a code there
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I am using C# Express 2010 on an XP box targeting .Net 4.0.
I have been following some examples from an article in MSDN Magazine[^]
At design time the ListBoxItems are visible, but at run time the ListBox is empty.
Here is the code, this is it, there's no code behind.
<StackPanel>
<StackPanel.Resources>
<XmlDataProvider x:Key="MoreColours" XPath="/colours">
<x:XData>
<colours>
<colour name="pink"/>
<colour name="white"/>
<colour name="black"/>
<colour name="cyan"/>
<colour name="gray"/>
<colour name="magenta"/>
</colours>
</x:XData>
</XmlDataProvider>
</StackPanel.Resources>
<TextBlock Width="248" Height="24" Margin="0, 5, 0, 0" Text="Colours:" TextWrapping="Wrap"/>
<ListBox x:Name="lboxColour" Width="248" Height="56" Margin="0,0,0,3" IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding Source={StaticResource MoreColours}, XPath=colour/@name}"/>
<TextBlock Width="248" Height="24" Margin="0,5,0,0" Text="You selected colour:"/>
<TextBlock Width="248" Height="24" Text="{Binding ElementName=lboxColour, Path=SelectedItem.Content, Mode=OneWay}"
Background="{Binding ElementName=lboxColour, Path=SelectedItem.Content, Mode=OneWay}"/>
</StackPanel>
The results are the same if I extract the XML to an external File, as here
<StackPanel>
<StackPanel.Resources>
<XmlDataProvider x:Key="Colours" Source="Colours.xml" XPath="/colours" />
</StackPanel.Resources>
<TextBlock Width="248" Height="24" Margin="0, 5, 0, 0" Text="Colours:" TextWrapping="Wrap"/>
<ListBox x:Name="lboxColour" Width="248" Height="56" Margin="0,0,0,3" IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding Source={StaticResource Colours}, XPath=colour/@name}"/>
<TextBlock Width="248" Height="24" Margin="0,5,0,0" Text="You selected colour:"/>
<TextBlock Width="248" Height="24" Text="{Binding ElementName=lboxColour, Path=SelectedItem.Content, Mode=OneWay}"
Background="{Binding ElementName=lboxColour, Path=SelectedItem.Content, Mode=OneWay}"/>
</StackPanel>
Does anyone have any idea why this might be. I am pretty sure that I have the code as in the article and I have asked a few days ago at the address given in the article, but have had no reply.
Henry Minute
Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
Why do programmers often confuse Halloween and Christmas? - Because 31 Oct = 25 Dec.
Business Myths of the Geek #4 'What you think matters.'
modified on Wednesday, June 30, 2010 6:51 PM
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I'm not sure why your XML data island x:XData isn't working, but the second version has to be able to find the XML file in the same directory as the executable. Either set the properties on it to copy to the output directory, or give it the full path, i.e
.<StackPanel.Resources>
<XmlDataProvider x:Key="MoreColours" XPath="/MyColours" Source="C:\Mef\WpfXmlSample\WpfXmlSample\Colours.xml" />
</StackPanel.Resources>
[Edit]Deliver a slap sideways to my head. The reason your XData isn't being picked up is because it's trying to resolve against a namespace (i.e. you need to supply a namespace to map against the XPath). To get round this, add xmlns="" to the x:XData declaration (i.e. <x:XData xmlns="">).
"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
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Thanks Pete. The empty namespace tip worked for my first example.
As far as the second (XML File) example the file is set to 'copy if newer' and it is definitely in the same directory as the exe. Before I posted I had already tried with it set to Build action of 'None' and 'Resource', neither of which worked.
If you, or anyone else, have any other ideas, I'd be glad to hear them.  
Henry Minute
Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
Why do programmers often confuse Halloween and Christmas? - Because 31 Oct = 25 Dec.
Business Myths of the Geek #4 'What you think matters.'
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I ran your sample with the following code and it works with this:
<Window x:Class="WpfXmlSample.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<StackPanel>
<StackPanel.Resources>
<XmlDataProvider x:Key="MoreColours" XPath="/MyColours" Source="Colours.xml" />
</StackPanel.Resources>
<TextBlock Width="248" Height="24" Margin="0, 5, 0, 0" Text="Colours:" TextWrapping="Wrap"/>
<ListBox x:Name="lboxMyColour" Width="248" Height="80" Margin="0,0,0,3"
ItemsSource="{Binding Source={StaticResource MoreColours}, XPath=MyColour}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding Mode=OneTime, XPath=@name}" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
</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.
My blog | My articles | MoXAML PowerToys | Onyx
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