AvaloniaUI+ReactiveUI中执行异步命令时,界面冻结。
创始人
2024-11-12 19:00:39
0

使用Command来执行异步操作,并在Command中实现ICancellableCommand接口来处理取消操作,避免界面冻结。

代码示例:

public class AsyncCommand : ICommand, ICancellableCommand
{
    private readonly Func _execute;
    private bool _isExecuting;

    public AsyncCommand(Func execute)
    {
        _execute = execute;
    }

    public bool CanExecute(object parameter)
    {
        return !_isExecuting;
    }

    public async void Execute(object parameter)
    {
        _isExecuting = true;
        try
        {
            await _execute();
        }
        finally
        {
            _isExecuting = false;
        }
    }

    public void Cancel()
    {
        // TODO: Implement cancellation
    }

    public event EventHandler CanExecuteChanged;
}

使用方法:

private AsyncCommand _asyncCommand;

public ViewModel()
{
    _asyncCommand = new AsyncCommand(ExecuteAsync);
}

public ICommand AsyncCommand => _asyncCommand;

private async Task ExecuteAsync()
{
    // TODO: Implement asynchronous operation
}

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