回答編集履歴

- ViewModelで`DispatcherTimer `を使ってはダメということはないので、単に移せばいいんじゃないでしょうか。

-

- UIスレッドで動かす意味はないのでこちらなどでもいいでしょう。

- [Timer クラス (System.Timers) | Microsoft Docs](https://docs.microsoft.com/ja-jp/dotnet/api/system.timers.timer)

- [Timer クラス (System.Threading) | Microsoft Docs](https://docs.microsoft.com/ja-jp/dotnet/api/system.threading.timer)

-

- こういったのもあります。

- [Observable.Timer Method (System.Reactive.Linq) | Microsoft Docs](https://docs.microsoft.com/en-us/previous-versions/dotnet/reactive-extensions/hh211753(v=vs.103))

-

- ---

-

- 追記 実装例

- 後片付け省略^^;

- それぞれ同じ意味にしたつもりですが、間違ってたらすいません^^;

- ```xaml

- <Window

- x:Class="DispatcherTimerTest.MainWindow"

- xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

- xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

- xmlns:local="clr-namespace:DispatcherTimerTest"

- Width="800"

- Height="450"

- DataContext="{x:Static local:ViewModel.Instance}">

- <StackPanel>

- <Label Content="{Binding LabelContent1}" />

- <Label Content="{Binding LabelContent2}" />

- <Label Content="{Binding LabelContent3}" />

- <Label Content="{Binding LabelContent4}" />

- </StackPanel>

- </Window>

- ```

-

- ```C#

- using System;

- using System.ComponentModel;

- using System.Reactive.Linq;

- using System.Runtime.CompilerServices;

-

- namespace DispatcherTimerTest

- {

- public class ViewModel : INotifyPropertyChanged

- {

- public static ViewModel Instance { get; } = new ViewModel();

-

-

- public int LabelContent1 { get => _LabelContent1; set => Set(ref _LabelContent1, value); }

- private int _LabelContent1;

-

- public int LabelContent2 { get => _LabelContent2; set => Set(ref _LabelContent2, value); }

- private int _LabelContent2;

-

- public int LabelContent3 { get => _LabelContent3; set => Set(ref _LabelContent3, value); }

- private int _LabelContent3;

-

- public int LabelContent4 { get => _LabelContent4; set => Set(ref _LabelContent4, value); }

- private int _LabelContent4;

-

- private System.Windows.Threading.DispatcherTimer dispatcherTimer;

- private System.Timers.Timer timersTimer;

- private System.Threading.Timer threadingTimer;

- private IDisposable observableTimer;

-

- public ViewModel()

- {

- dispatcherTimer = new System.Windows.Threading.DispatcherTimer();

- dispatcherTimer.Interval = TimeSpan.FromMilliseconds(100);

- dispatcherTimer.Tick += (s, e) => LabelContent1 += 1;

- dispatcherTimer.Start();

-

-

- timersTimer = new System.Timers.Timer(100);

- timersTimer.Elapsed += (s, e) => LabelContent2 += 1;

- timersTimer.AutoReset = true;

- timersTimer.Enabled = true;

-

-

- threadingTimer = new System.Threading.Timer(x => LabelContent3 += 1, null, TimeSpan.FromMilliseconds(100), TimeSpan.FromMilliseconds(100));

-

-

- // NuGet System.Reactive.Linq

- observableTimer = Observable.Timer(TimeSpan.FromMilliseconds(100), TimeSpan.FromMilliseconds(100))

- .Subscribe(_ => LabelContent4 += 1);

-

- }

-

- #region INotifyPropertyChanged

- public event PropertyChangedEventHandler PropertyChanged;

- protected bool Set<T>(ref T storage, T value, [CallerMemberName] string propertyName = null)

- {

- if(Equals(storage, value)) return false;

-

- storage = value;

- OnPropertyChanged(propertyName);

- return true;

- }

- protected void OnPropertyChanged([CallerMemberName] string propertyName = null)

- => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

- #endregion

- }