禁用MVVM中的按钮 [英] Disable a button in MVVM

问题描述

我有一个按钮点击事件。

I have a button click event.

private async void Start_Click(object sender, RoutedEventArgs e)
{
     try
     {
         Start.IsEnabled = false;
         Start.IsHitTestVisible = false;
         Start.Background = Brushes.Red;

xaml：

The xaml:

<Button Grid.Column="1" Grid.Row="3" Command="{Binding StartProcess}" Width="200">Start</Button>

现在我将使用MVVM模式然后摆脱代码，代码是什么？假设在你的XAML中使用icommand。

Now I am going to use MVVM pattern then get rid of code behind, what is the code? Suppose use icommand.

推荐答案

in your XAML

<Button Command="{Binding SomeCommand}">Do Something</Button>

public class MyViewModel : ViewModel
{
    private readonly ICommand someCommand;

    public MyViewModel()
    {
        this.someCommand = new DelegateCommand(this.DoSomething, this.CanDoSomething);
    }

    public ICommand SomeCommand
    {
        get { return this.someCommand; }
    }

    private void DoSomething(object state)
    {
        // do something here
    }

    private bool CanDoSomething(object state)
    {
        // return true/false here is enabled/disable button
    }
}

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