mvvm-light

问题 I have an MVVM-Light based WPF application, with a dialog service (called WindowManager ) that opens up dialog windows bound to pre-initiated dialog view-models, like this: private enum ViewModelKind { PlanningGridVM, InputDialogVM, TreeViewDialogVM, SaveFileDialogVM, MessageBoxVM } /// <summary> /// Shows the Window linked to this ViewModel as a dialog window. /// </summary> /// <typeparam name="TViewModel">The type of the view model.</typeparam> /// <returns>Tri-state boolean dialog

问题 I've done a few WPF projects now and see the same problem pop up and that is the "problem" of aggregating/combining dependency properties (dp's). For example, I have 10 dp's of type bool that I want to combine and expose as a seperated dp. The combined dp is true unless one or more its constituents is false. I currently do this using the addValueChanged which registers a callback for each of the 10 (!() dp's but am wondering if there are more elegant solutions or maybe a framework that

问题 I've done a few WPF projects now and see the same problem pop up and that is the "problem" of aggregating/combining dependency properties (dp's). For example, I have 10 dp's of type bool that I want to combine and expose as a seperated dp. The combined dp is true unless one or more its constituents is false. I currently do this using the addValueChanged which registers a callback for each of the 10 (!() dp's but am wondering if there are more elegant solutions or maybe a framework that

问题 I want to assign the same command to all my buttons on my user control. I use MVVM Light and I have tried all combinations. I have also tried to use EventSetter, but this does not allow binding to a command in the ViewModel Here is a sample of what I am trying to do: <Style x:Key="CalculatorButton" TargetType="telerik:RadButton"> <Setter Property="Margin" Value="2"/> <Setter Property="Cursor" Value="Hand"/> <Style.Triggers> <i:EventTrigger EventName="Click"> <cmd:EventToCommand Command="

问题 I have a basic registration page when the user register her data, I save an object of this data in a static field of the Settings static class , so I can fill the common fields with other registration pages, like first_name , last_name , email ...etc. so the user doesn't have to re-fill them again. the very specific case I have is, one of these common pages is the basic registration page itself (with some fields excluded). first that's how the common fields look like: <Entry Text="{Binding

问题 [UWP - Windows 10] I'm new to MVVM-Light and so I got some starter issues. I created a custom Usercontrol which is called TileToolbar and is containing this xaml: <StackPanel Orientation="Horizontal" HorizontalAlignment="Center"> <RadioButton Style="{StaticResource NavRadioButtonStyle}" Tag="" Foreground="Green"></RadioButton> <RadioButton Style="{StaticResource NavRadioButtonStyle}" Tag="" Foreground="Green"></RadioButton> <RadioButton Style="{StaticResource NavRadioButtonStyle}" Tag=""

问题 I have a generic ShowMessage class that I want to use to carry data around: class ShowMessage<T> { private readonly T _Data; public string Title { get; set; } public T Data { get { return _Data; } } public ShowMessage( T data) { _Data = data; } } In my ViewModel I want to register for all possible ShowMessage instances, but currently I haven't found a way. Has anyone registered a generic base class (note: I want to register only once and not n-times to have a clean code) Edit: To make my

问题 My wpf application has child windows that popup to show views to the user. The child windows are closed by executing CloseCommand on the window's viewmodel, which sends a CloseWindowMessage using itself as the token. This is the viewmodel used: public class ChildWindowViewModel : ViewModel { ICommand _closeCommand; public ICommand CloseCommand { get { if (_closeCommand == null) _closeCommand = new RelayCommand(DoClose); return _closeCommand; } } public void DoClose() { System.GC.Collect();

问题 I have a really awkward problem. I have build my app for iOS and tested it on all emulators and it works fine. I have installed it on a device (iPhone 6 plus) and that works fine as well. However, when I submit it to the app store, the feedback is that it crashes on launch on all devices. The crash log attached shows this error; Unhandled Exception: System.ExecutionEngineException: Attempting to JIT compile method 'GalaSoft.MvvmLight.Messaging.Messenger:get_Default ()' while running with -

问题 I'm developing a Windows 8.1 store app with C# and .NET Frameowork 4.5.1. I'm trying to pass a PasswordBox as a parameter on a button Command . I've tested the following code on WPF and it works. MainViewModel class: public class MainViewModel : ViewModelBase { private RelayCommand<PasswordBox> doLoginCommand; /// <summary> /// The <see cref="UserName" /> property's name. /// </summary> public const string UserNamePropertyName = "UserName"; private string _userName = string.Empty; ///