I'm new to Silverlight and NavigationService. I try to adopt them with MVVM. I found this link but it don't work for me, may be I do something wrong. (It don't has sample solution) I want to know, are there any website/example out there? ...
hello, i have a NavigationWindow that implements a wizard functionality, and a set of Page objects that represent the steps. each Page uses a separate view model. some of these view models spawn worker threads from their constructors. i terminate these threads when the view models are disposed of (they implement IDisposable). further...
I want to initiate a bound command, but I don't want to use a Button on my UserControl. In effect the UserControl is itself a Button. When it is clicked anywhere on its surface I want to initiate a bound command. Is there a way to give a UserControl a command? In a side note: one command for one control and only a few certain out-of-th...
Hi I'm new to MVVM and need a bit of help. My application consists of a number of different windows which display controls allowing the user to edit the data in the Business layer. At the moment, each time the user opens a new instance of one of these windows, a ViewModel structure - classes and collections mirroring the Business laye...
A common approach for communication between 2 ViewModels is this: http://stackoverflow.com/questions/2474768/mvvm-view-model-view-model-communications The Mediator pattern or a Messenger class. But what about 6 ViewModels in one Window? NewSchoolclassUserControl NewPupilUserControl SchoolclassListUserControl PupilListUserControl Pupi...
Greetings, I am relatively new to WPF and have an issue relating to validation with DataGrid control. I have read this article (http://msdn.microsoft.com/en-us/magazine/ff714593.aspx) which covers three different ways to validate, but none of them seem to address how to prevent setting a value or calling a undo/redo command before all v...
Hi, Please look into this question. http://stackoverflow.com/questions/3795737/issue-with-mvvm-view-first-approach But I'm unable to find "x:Shared" attribute. Please help. ...
If I want to access the clipboard with MVVM how can I do it? ...
I'm trying to figure out the best way to bubble up PropertyChanged events from nested Properties in my ModelView. Say I have my ModelView PersonModelView which has a Property PersonModelView.Address. Address in turn has a property City. When I bind to City in my view, I would do something like {Binding Address.City}. My problem is that ...
Hi, I have one user control in wpf. And I want to use this user control two times in same view. I am using mvvm approach. Can anybody give me a good suggestion that what approach I should follow. ...
I have several ViewModels all doing partly the same: del/add/export etc documents. At the moment the code to call these methods lives in the viewmodels. So I have to copy/paste it... When I put that code in a DocumentHelper class I have it only one time, but do you see any reason against calling database methods from a Helper class? ...
Hello, I have the following simplified ViewModel public class UserViewModel : IUserViewModel { public DelegateCommand<object> NewUser { get; private set; } public ObservableCollection<UserInfo> UserList { get; set; } public UserViewModel( ) { NewUser = new DelegateCommand<object>( OnNewUser ); this.UserLi...
Hi I am new to this and hence getting no clue of the solution. I've my silverlight3 app built and WCF services also built and hosted on local host. I'm looking for a way to call methods of my service from my silverlight3 app. i dnt knw the steps and not able to find them through web also. please guide me step by step. its driving me cra...
I'm new to MVVM in silverlight. It's a bit confusing because although I get the general idea, there are so many different situations where the method is not very straight forward. Here's one of them: I have a custom text box which when set to blank shows a grayed message 'enter your text here'. The problem is, when binding to my view...
I'm creating an application and I've been under the assumption that when a control is bound to a member in the view-model (i.e. a TextBox to a string field) the string is updated whenever the user changes the information in the textbox and no later. But what I've found is that the string is updated when the textbox is changed AND when t...
If I expose my EF 4 Model objects (EF4 entities) as properties on my ViewModel am I "breaking" MVVM ? Do I have to duplicate each Model class as some sort of DTO and expose those DTOs from the ViewModel ? I understand the theoretical value of having the View "not know" about the Model, but the reality is that (if I don't expose the M...
Hi, I am playing around with the WP7 SDK and the Prism for WP7 beta and have come across a problem I can't figure out (or even a workaround for). First of all, I'm new into WPF/Silverlight/WP7 and Prism, so I could be overlooking something very obvious. So I have a Shell page that has my region that is used to hold my content page...
I have a view model that has a "IsSearchVisible" property. When it gets set to true I want it to start an animation in the view that slides down the search box. Anyway to achieve this in Silverlight/WP7? ...
I have tabs representing documents, something like in Word. My TabControl is bound to an ObservableCollection<TabViewModel>. TabViewModel has a property CanSave indicating whether a document can be save. When it can be saved, I want to bold it and prefix it with an "*". How can I do this? I think I need to 1st make CanSave a DependencyPr...
Suppose I have a ViewModel TabViewModel that Extends ObservableObject the class for ViewModels in the MVVM Foundation Framework. Then I also have a EditorTabViewModel that extends TabViewModel, Now I need to extend DependencyObject to implement DependencyProperties. I cannot extend more than 1 class. How might I implement this? I could h...