I currently have a view that contains a ListBox bound to a a collection of view models and a user control that I would like to bind to the current item that the mouse is over. How can I get the current highlighted item in the list and bind it to the user control using only XAML and code in the View Model?
Edit: The following image might be more descriptive of the intended action.
alt text http://img134.imageshack.us/img134/6263/34548010.png
As eduardo said, sometimes to make a solution in pure MVVM is too complicated.
if you reformulate your question and provide some code, you can get more answers.
Related
i want to immitate the behavior of multiselection of items (eg. in a list view) and their appearence in a PropertyGrid. So, obly the same properties are shown and values set in the grid are set on all multiselected properties.
I have created a listview with some datatemplates and have in another listview some data(with databinding). Now i want wo have a multiselection on the listview with the data and have the properties shown in the another listview like in a propertygrid.(explanation: The ProprtyGrid is still not available in WPF and if has not the flexibility of showing data the way i need it)
So, how do i need to prepare my data to be shown in the list propertygrid-multiselection-style? Is that even possible???
Greets,
Jürgen
I'm not sure if this question is still active, or what not. But I have found a solution that works for me - and I need somewhere to share it.
The first issue you are going to have solve is selecting the items, ie. multi-select. See my tip here that explains how to do that.
Next, I guess its basically binding to listview's selectedItem property and how you want to update your propertyGrid based on changes to the selectedItem prop.
Hope this helps.
This feels like a stupid question, but is there a simple control for WPF that just displays a collection of items? I am currently using a ListBox to display a collection of usercontrols, but the selection element is not needed and the highlighting is actually a distraction. I could disable the highlighting, but this seems like extra work if a simpler control exists. I don't need to track the selected item.
Basically, I want a stackpanel that I can just define an itemssource of viewmodels for. Does such a thing exist?
You can use an ItemsControl - it's pretty much exactly what you are looking for
I searched this site and i found 2 Links
how to load wpf usercontrol in MVVM pattern
MVVM-Light: Load UserControl into Window
but still i cant find the answer to my problem and this link
MVVM-Light Locator Pattern and Reusable UserControl
i Didn't Understood.... so here is i am stating my problem which might help others struggling like me ......
I have a MainWindow which has 2 parts one has a TreeView(a
UserControl) and the other Displays different user controls(named DisplayPanel).... just like windows Explorer.
The Display Panel on the Right side will display different user controls on Clicking nodes of tree view.
and my TreeView is Itself a user Control.
How can i make this composite UI Work using MVVM. Also I am planning to use MVVM light Toolkit. Does this have something that can help...
An Example will be great
Thanks... :)
Edit
My TreeView in a UserControl I made a dependency property in the UserControl which catches the selected Item fo the tree view so that i can use this dependency property to populate the required view in the "MainView" ContentControl binding....as you advised me in the comments. Everything is till now
Problem is that i want to display data contained in the the selected item and i cannot set the DataContext of the UserControls(which will be displayed in right hand side) to the selected item as then i will not be able to use my view model for the respective usercontrol for commands and other operations
I tried to solve this too.... i used the Mediator (Messenger) in my TreeViewUserControl view model to send a Message to the Usercontrol's(the one that i need to display) view model . Message will be passed whenever the item is selected in the tree view. and message contains the selected node. I forgot to mention i set the datacontext of the UserControl to its view model so that i could display data
But using this approach the problem is that when the I click a type of node for the first time the data is not populated but if the same type of node is clicked again its populated. What’s happening is that UserControls object is availabe when the the tree item is clicked for the first time and Mediator sends the message. So Mediator is not able to pass the message to the userControl view model.....
I totally do not have ne idea to solve this further.... is my way if displaying user control right or I should do something that else....totally confused.....
You could try defining a DataTemplate for each type in the TreeView's ItemsSource and instead of having a specific UserControl on the right side, just bind to the TreeView's SelectedItem. Alternatively, you could use a DataTemplateSelector.
Edited for OP's Edit
Did you do this?
MainWindow has TreeView whose ItemsSource=Binding MainVM.Items.
MainWindow has ContentControl whose Content=Binding TreeView.SelectedItem.
Somewhere in project, have ResourceDictionary where each possible type in MainVM.Items has a DataTemplate defined?
Which ViewModel (MainVM or ItemVM) are you trying to use and why can't you use it?
I have an mvvm application...I need to have an editable listview.
I am binding my observable collection to listview.
How could I track changes of the values in listview ?...I mean if user edit an item...I need to have changed values in my observable collection.
If I use datagrid in WPFToolKit, is it easy ?
In a word, yes.
Take a look at data templates in WPF. They allow you to define how you want each item in your list (or any control) to appear and behave. So each item in your listview can one or more editable controls that are bound to each item in your collection (in this case an ObservableCollection). As you change data in the listview, the bound objects will in your collection will be updated in real time.
This is also possible with a datagrid.
Have a look at this link
http://www.switchonthecode.com/tutorials/wpf-tutorial-using-the-listview-part-3-in-place-edit
It is recommended you to use the Datagrid.It already provides the edit mode functionality. You can use a TemplateColumn to provide editing views.
if you have an editable Collection in your viewmodel, just take a datagrid(editable stuff built in). you can create styles or use templates so that the datagrid look the way you want.
If I use datagrid in WPFToolKit, is it easy ?
yes ;) but if you can, use the .net4 datagrid
I want to create my own expandable/collapsable tree-like UserControl, which nodes are the Border elements with any content. And this control should have the single SelectedItem. When I select one of the nodes I want to see details information about selected item.
I've done the control's presentation and a piece of logic:
I can see all the tree of elements, collaps any node(s), select one of them and see details. But I can't do bidirectional binding. I.e. I want to have an opportunity to change fields in details panel and immidiately see changes in the tree-control.
Help me please either call force update (rebind data) of the control (just give a tip how to perform this) or give an advise how to create my own List-like UserControl.
I tried to make my control inherit from some ListBox class but I couldn't.
PS. Sorry for my bad English...
Use the TreeView control.