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Actually, I resolved this issue over the weekend. What I ended up doing was... since I already have a "ListViewEx : ListView" type class where I've enhanced the ListView, I just added a "SelectedItemsEx" DP. The control listens to the SelectionChanged event as well as collection changed notifications on the SelectedItemsEx collection and keeps the two lists in sync. Works great and now I can just do "SelectedItemsEx={Binding SelectedItems}" in my XAML and have a SelectedItems property in my VM thats totally in sync with the control both ways. Only catch is that the collection binding to SelectedItemsEx has to implement IList and INotifyCollection changed, but all the collection classes do that already, so no biggie. VERY CLEAN solution  .
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Very nice.
Everything makes sense in someone's mind
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No just an ObservableCollection<> will not work directly.
The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.
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Hi every one,
I m working on an apllication that uses bing map , and I m using WPF , can you please show me how to integrate the bing map control ?
thanks in advance
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This[^] may help.
The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.
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I have a ListView in my main window which displays data from a bound List<T>. This List is re-sorted according to different criteria according to user actions.
I want to apply conditional formatting to this ListView for both Font and Background, based on the contents of two different fields of the <T> objects.
At least the values of the field responsible for the Font formatting can change during run time.
I don't have any idea how to code this... 
Hopefully
---Dirk Bock
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Create a read only property on the object for the font and background that you want, and bind the relevant properties in the ItemTemplate?
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Hi,
This the type of xaml I am using to navigate...
Question:
Whether or not I use the TargetName="mainFrame" in the hyperlink button, the user still gets navigated to the Signup page inside the frame.
What is the benefit of using the TargetName in this case?
Thanks
<navigation:Frame x:Name="mainFrame" UriMapper="{StaticResource UriMapper}"
Source="Home" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch" >
</navigation:Frame>
<stackpanel>
...
<HyperlinkButton x:Name="SignupLink" NavigateUri="Signup" TargetName="mainFrame" Content="Signup" Style="{StaticResource FooterLinksStyle}" />
</stackpanel>
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I want to enable drag/drop in my app.
1) Allow the user to drag a shape off a ToolBox onto the canvas (I'm assuming canvas is what I want). I could live with "click and place", versus drag onto the canvas.
2) Allow the user to move the control around on the canvas.
When I Google WPF Drag Drop all I seem to find is dragging data from one control to another, which is not what I want.
Anyone have an example of how to do this?
Everything makes sense in someone's mind
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That's EXACTLY what I want
Thanks
Everything makes sense in someone's mind
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How about this[^]?
The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.
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I understand that the WPF TreeView control is all whizzy and customisable but it is truly horrible to use - great wodges of code just to expand an item or select an item.
Are there any more usable TreeViews on the market? I have wasted an entire day (again) wrestling with the builtin TreeView and I have decided I want a TreeView which works. Anybody got any suggestions?
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If you are having trouble with the WPF TreeView, I'm assuming its because you are manually managing the TreeViewItems? Manually managing a TreeView and its items is pretty bad and you end up with horrid code. If you use the TreeView as intended with data binding and HierarchialDataTemplates, its a breeze.
modified on Thursday, March 31, 2011 1:23 PM
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If not a breeze, at least a mild stirring of wind 
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I am using databinding and HierarchialDataTemplates. How do I tell the treeview to expand the root node when it is loaded and how do I select an item in the treeview when it is loaded? If I was adding TreeViewItems in code it would be easy to epand the root node and select an item but I am not, I am doing it the WPF way.
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Ok, no problem. Dealing with item based controls in WPF is kind of a PITA because... Well, lets say you are binding to a collection of type Widget. So part of the tree control interacts with objects of type Widget, and other stuff you need to do is in the wrapping type TreeViewItem. TreeViewItem wraps your Widget class. One tricky aspect that kills a lot of people is that the TreeViewItem item that wraps a specific Widget doesn't exist all the time and randomly changes instances (like when the visual goes off screen).
In your case, you want to set the TreeViewItem.IsExpanded and the TreeViewItem.IsSelected.
You use ItemContainerGenerator.ContainerFromItem(widget) to go from a Widget to a TreeViewItem, but as I said above, the TreeViewItem don't exist all the time and comes and goes. So you have to subcribe to the ItemContainerGenerator.StatusChanged event to know when you can access the TreeViewItem.
What a lot of people do is add IsExpanded and IsSelected properties to the Widget object and in the XAML bind the Widget IsExpanded to the TreeViewItem.IsExpanded. The two properties in Widget either need to be dependency properties or Widget needs to implement INotifyPropertyChanged.
That way you will ALWAYS have access to the two properties and you just set / get them in your Widget object.
modified on Friday, April 1, 2011 1:17 AM
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I have been trying that but without much success. I will give it another go. Thanks
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Tried adding IsExpanded properties to the widget with INotifyPropertyChanged with a TreeViewItem Style binding IsExpanded. It doesn't make any difference.
When should I set the IsExpanded property to true? I need the root node to be expanded as soon as the window is shown
I really just want a simple treeview which works as a treeview should work.
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Fixed it - I alread had a style on TreeViewItem so adding another one just got ignored 
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Glad you got this working .
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Any idea how to scroll a selected item into view? I have tried the many ways people have posted on various sites but no joy yet. 2 days and counting on this lousy treeview so far. It should have taken 5 minutes.
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Hmm, I have added this to the TreeViewItem style:
<EventSetter Event="Selected" Handler="OnTreeViewItemSelected" />
and call BringIntoView on the OriginalSource
seems to work.
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Telerik has a control.[^]
The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.
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