WPF design pattern that provides a generic reusable implementation of ICommand. Versions of this object can be found in the versions of Microsoft Prism.
Questions tagged [delegatecommand]
100 questions
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How do I get DelegateCommand CanExecute to update WPF UI using MVVM?
Working off of this question, I'm attempting to make a UI with two buttons. Pressing one button disables itself and enables the other. I'm using the MVVM pattern and DelegateCommand:
MainWindow XAML
watkipet
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Xamarin Forms Prism Pass a property via CommandParameter
I don't know how I can pass a single property via CommandParameter to my Command function in the ViewModel.
Now I pass the whole object (CategoryListItem) but I only need the value from the Id property. How can I achieve this?
Class:
public class…
Nanou Ponette
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How to test async void DelegateCommand method containing await with xUnit?
It is my first time when I write unit tests for async method. I am using xUnit. I searched SO with no promissing results. Best I found, but didnt work for me, is to implement IAsyncLifetime from THIS example. I will be thankful for any hints how to…
bakunet
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How to implement if, else statement in CanExecute command or Delegate command in wpf c#?
I'm new to WPF and Prism. How do I use an if else statement when using CommandCanExecute(), CommandExecute()/Delegate commands?
I have a code to load and get the instance of livechart. However, if the file for the chart does not exist in the users…
Faris Ahmad
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wpf DelegateCommand return not fire
I'm using Mvvm pattern and in View when the UserControl-Initialized event is binding to InitializedCommand as below.
HyunYoung Go
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How to enable KeyBinding for DelegateCommand in Prism 4?
I would like to enable a KeyBinding for a DelegateCommand in a Prism4 desktop application. For example, in my XAML file I have this:
Tom
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Implementing RaiseCanExecuteChanged method inside setter of a class object
I am still not sure if my approach is correct, but in an attempt to implement the MVVM pattern, I have created a model class 'Test' in the following way:
public class Test : BindableBase
{
private int testNumber;
public int TestNumber
{
…
r_laezza
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WPF How to execute command for current active tabitem?
I'm using prism TabControl Region inside the shell view.
Each TabItem contains AView and AViewModel.
I can determine the currently active TabItem using a property IsActive property in AViewModel.
IsActive property is set to true only for the current…
IBRA
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Can execute question using delegate commands in prism
This seems like a dumb question but I have looked through the docs for prism and searched the internet and can't find an example... Here is the deal.
I am using a DelegateCommand in Prism, it is working fine except when I assign a delegate to the…
Kenn
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In WPF/Prism, what happens with a CompositeCommand when a DelegateCommand.RaiseCanExecuteChanged is fired?
Say that I have a CompositeCommand with a lot of DelegateCommands registered.
If one of the child DelegateCommands fires up RaiseCanExecuteChanged, this will result in firing the event CompositeCommand.CanExecuteChanged, raising this same event in…
Carlos Melo
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Exception Handling in Prism Async DelegateCommand
I am having a lot of troubles to catch an exception in a async DelegateCommand (Prism 5).
In constructor of the ViewModel:
cmdModificarPedido = New DelegateCommand(Of Object)(AddressOf OnModificarPedido, AddressOf CanModificarPedido)
In the…
Carlos
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Why is this command not invoked?
Here is what I consider the relevant part of the ListView in question:
…
ProfK
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How can I notify the containing Window that a certain UserControl it contains invoked an ICommand/RelayCommand/DelegateCommand?
TL/DR:
How can I notify the containing Window that a certain UserControl it contains invoked an ICommand/RelayCommand/DelegateCommand ?
I want to respond the CanExecuteChanged events in the Window.
Expansion:
The UserControl:
Tar
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DelegateCommand with another CanSee func except CanExecute
I want to create context menu item collection that each one of the item have header, command, can execute command and also to add a new feature for visibility that is also function like 'canExecute' but with other condition.
When i'm pressing on a…
user436862
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Populate a second DataGrid once I double click on a row WPF
I am still a little new to wpf and MVVM. I am trying to code a solution without breaking that pattern. I have two (well three, but for the scope of this question just two) DataGrids. I want to double click on the row of one, and from that load…
SoftwareSavant
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