Eple Posts - Answer Overflow

Eple

•Created by Eple on 6/3/2024 in #help

✅ Help needed: Buttons update enabled state after two clicks.

Hello, I need help to find out why it takes two clicks before the buttons change the enabled state. Please see the attached video and also my code below:

  <StackLayout>
      <Button Text="Start the service" Command="{Binding StartTheServiceCommand}" />
  </StackLayout>
  
  <StackLayout>
      <Button Text="Stop the service" Command="{Binding StopTheServiceCommand}" />
  </StackLayout>

  <StackLayout>
      <Button Text="Start the service" Command="{Binding StartTheServiceCommand}" />
  </StackLayout>
  
  <StackLayout>
      <Button Text="Stop the service" Command="{Binding StopTheServiceCommand}" />
  </StackLayout>

public MainPageViewModel(ILogger<MainPageViewModel> logger, WorkerService workerService)
{
  _logger = logger;
  _workerService = workerService;

  StartTheServiceCommand = new Command(
    execute: () =>
      {
        _logger.LogInformation("Starting the service at: {time}", DateTimeOffset.Now);
        Task.Run(async () => await _workerService.StartAsync(new()));
        RefreshCanExecutes();
      },
    canExecute: () => !_workerService.IsRunning);
        
  StopTheServiceCommand = new Command(
    execute: () =>
    {
      _logger.LogInformation("Stopping the service at: {time}", DateTimeOffset.Now);
      Task.Run(async () => await _workerService.StopAsync(new()));
      RefreshCanExecutes();
    },
    canExecute: () => _workerService.IsRunning);
}
    
public ICommand StartTheServiceCommand { get; }
public ICommand StopTheServiceCommand { get; }

private void RefreshCanExecutes()
{
  (StartTheServiceCommand as Command)!.ChangeCanExecute();
  (StopTheServiceCommand as Command)!.ChangeCanExecute();
}

public MainPageViewModel(ILogger<MainPageViewModel> logger, WorkerService workerService)
{
  _logger = logger;
  _workerService = workerService;

  StartTheServiceCommand = new Command(
    execute: () =>
      {
        _logger.LogInformation("Starting the service at: {time}", DateTimeOffset.Now);
        Task.Run(async () => await _workerService.StartAsync(new()));
        RefreshCanExecutes();
      },
    canExecute: () => !_workerService.IsRunning);
        
  StopTheServiceCommand = new Command(
    execute: () =>
    {
      _logger.LogInformation("Stopping the service at: {time}", DateTimeOffset.Now);
      Task.Run(async () => await _workerService.StopAsync(new()));
      RefreshCanExecutes();
    },
    canExecute: () => _workerService.IsRunning);
}
    
public ICommand StartTheServiceCommand { get; }
public ICommand StopTheServiceCommand { get; }

private void RefreshCanExecutes()
{
  (StartTheServiceCommand as Command)!.ChangeCanExecute();
  (StopTheServiceCommand as Command)!.ChangeCanExecute();
}

8 replies

CC#

•Created by Eple on 5/31/2024 in #help

Why does it give the error?

3 replies

CC#

•Created by Eple on 4/12/2024 in #help

Help Needed: Choosing Between VSCode on Mac or Visual Studio via Remote Desktop for Windows Backgrou

I'm starting a new project and can't decide between two options: using VSCode on my Mac or using Visual Studio on a Windows computer through remote desktop (the connection is fast and stable). The project is a background service that will eventually run on Windows. Any suggestions on which setup would be better for this?

10 replies

CC#

•Created by Eple on 3/15/2024 in #help

Background Service and Blazor

Hi all, I wish to create a Service and a Blazor interface. Can someone help me get started? That is a Service doing some work and a Blazor interface communicating with it. I need help to choose the right project types.

14 replies

CC#

•Created by Eple on 3/2/2023 in #help

❔ JObject find value

I have the following JSON

{
    "sale": {
        "id": "x",
        "transaction": {
            "id": "y",
            "state": "Completed"
        }
    }
}

{
    "sale": {
        "id": "x",
        "transaction": {
            "id": "y",
            "state": "Completed"
        }
    }
}

I want to check if sale.transaction.state == "Completed" But since the keys sale, transaction and state are optional and not always in the response, I must check for their presence. Is there a better way than what I have below?

var responseObject = JObject.Parse(responseString);
if (responseObject["sale"] != null && responseObject["sale"]["transaction"] != null && responseObject["sale"]["transaction"]["state"] != null)
{
    if (responseObject.Value<string>("sale.transaction.state") == "Completed")
    {
        Console.WriteLine("Yes");
    }
}

var responseObject = JObject.Parse(responseString);
if (responseObject["sale"] != null && responseObject["sale"]["transaction"] != null && responseObject["sale"]["transaction"]["state"] != null)
{
    if (responseObject.Value<string>("sale.transaction.state") == "Completed")
    {
        Console.WriteLine("Yes");
    }
}