Can anyone speak to the ease of dividing work amongst multiple developers when designing and building a medium- to large-complexity Silverlight or WPF application? My team is finding it difficult to cleanly split work when you've got, for example, a number of controls that provide different visualizations of a Model/ViewModel that's fair...
I have a observable collection exposed as a property within a view model. The observable collection is loaded with objects from a data access layer (linq2sql). When a new item is added to the database through another view model what is the best way to update the observable collection? Should I repopulate the observable collection with a...
I've three models (Contacts, Notes, Reminders). I want to search all these and produce the filtered result in a single listview and depending upon the selection I've to display the corresponding view(UserControl) to its right. I want the right way of implementing the design or atleast alternatives to this method that I've tried. Now I'...
Hi I'm having a problem understanding something about MVVM. My application relies on dialogs for certain things. The question is, where should these childwindows originate from? According to MVVM, viewmodels should contain only businesslogic and have zero actual knowledge about UI. However, what other place should I call my childwindows...
Using MVVM and EF...I have a datagrid binding to a View Model (using ObservableCollection). The view model has a save command which simply calls the SaveChanges command of the Data Context. However, when a user adds a new row to the datagrid, the new entity is detached. Is there any easy way to automatically attach it when it gets cre...
Given a content presenter that can display one of 4 different application pages, and I want to fade/otherwise animate a transition between pages based on view model state. Ideally I'd like to have these all defined within a DataTemplate, and then trigger transitions based on an enum from the view model, so that when some enum representi...
Hi everyone I wanted to know if some of you guys can post some articles, blog posts etc. that explain the MVVM Pattern in detail. There are not much explainations out there I think ( except Tutorials). I'm going to write my exam about WPF and also want to build in the MVVM Pattern. So I need some good references that are also digging a ...
Hi, I am searching about how to create the columns of the DataGrid from the ToolKit dynamic in MvvM way. But looks like it is impossible ! Is there some one that had to do the samething ? there is no need to create a usercontrol or another control that comes from DataGrid, I just want to set de ItemSource of the grid to my custom obje...
I have a Silverlight page that gets its data from a view model class which aggregates some data from various (RIA services) domain services. Ideally I'd like the page to be able to data bind its controls to properties of the view model object, but because DomainContext.Load executes a query asynchronously, the data is not available when...
Hello everybody, I have looked some videos and read some articles about MVC, MVP, MVVM. I think, that I understood basic principles and differences. But it seems to me that samples in articles and videos are very easy. I think that it's easy to learn how to apply these patterns when you can look on some projects. So I'd like to look ...
Thre's something I don't get. If i have for instance a profile.xaml page and I have a ProfileViewModel with a user instance. How do I tell the ProfileViewModel with a User property to load user with an id that I want? I mean : How do I pass a userid to the profileviewmodel when I click a button in another page to open that page? For In...
Still a bit new to the concept of M-V-VM in WPF, here's my problem: I've built up my ui pretty cleanly, I have the following: CareersView.xaml - View CareersView.xaml.cs - View (Code Behind) CareersViewModel.cs - View-Model Career - Model The View-Model is all wired up through bindings and cleanly keeps all logic inside it for testa...
Hello, i've a contentcontrol in my Wpf-App (MVVM) which is bound to an object and displays the objects properties in textboxes, so the user can edit the values of the properties. I want to implement undo/redo functionality with the command pattern of the GoF. For this i need a point where i can create the command and set it into my undo...
I am looking at creating my own development framework for Silverlight as an exercise in understanding MVVM and approaching some concepts that are still unknown to me. So there are a couple of issues: 1) I am thinking about the following problem: I create custom/user controls that contain buttons/hyperlinks that would essentially change...
Regard this image: The TimeTableViewModel of this user interface is this: public string SchoolclassCodeMonday {get;set;} public string SchoolclassCodeTuesday {get;set;} public string SchoolclassCodeWednesday {get;set;} public string SchoolclassCodeThursday {get;set;} public string SchoolclassCodeFriday {get;set;} public string Schoolc...
JavaFX with it's binding seems great technology for building UI layer, replacing PHP+AJAX, but are there any frameworks for building database forms applications with JavaFX, or it is meant to write everything from scratch? ...
I have a Custom usercontrol that I want to enlarge. I tested this whit a function call on MouseDoubleClick and it worked fine. Code: XAML <cc:UserControl ItemsSource="{Binding Path=DataItem}" MouseDoubleClick="UserControl_MouseDoubleClick" /> CodeBehind c# private void UserControl_MouseDoubleClick(object sender, MouseButtonEventArgs ...
Hi, I have two ComboBoxes, one for Organisation and one for Region. When selecting Organisation I want the Region combobox to update itself with the related regions. After selecting Organisation and Region I can type in a Site to a textbox and store it to db (ADD mode). I've completed that with this code: <ComboBox x:Name="cbOrganisatio...
Hello, I have a view that allows the user to select some data : some dates for example, and executes a command that needs these data. So in my command I should have a reference to the selected date, but what is the best practice to make this date go to the ViewModel side where the command lives : to add a SelectedDate dependency prop...
I'm trying to validate data in my MVVM application using IDataErrorInfo, but I'm running into some problems. When I set my TextBox with an invalid value, the validation works fine. But after I set the value of the TextBox to a valid value and I get this exception: A first chance exception of type 'System.ArgumentOutOfRangeException' oc...