ReactiveCommand.CreateAsyncTask 的 ReactiveUI 异常句柄恢复

Question

查看 ReactiveUI ReactiveCommands 的许多示例，代码看起来像

Delete = ReactiveCommand.CreateAsyncObservable(x => DeleteImpl());
Delete.IsExecuting.ToProperty(this, x => x.IsDeleting, out _isDeleting);
Delete.ThrownExceptions.Subscribe(ex => this.Log().ErrorException("Something went wrong", ex));

我正在尝试使用 CreateAsyncTask 而不是 CreateAsyncObservable

Delete = ReactiveCommand.CreateAsyncTask(x => DeleteImpl());
Delete.IsExecuting.ToProperty(this, x => x.IsDeleting, out _isDeleting);
Delete.ThrownExceptions.Subscribe(ex => this.Log().ErrorException("Something went wrong", ex));

Delete command 绑定到 WPF 按钮。

使用 CreateAsyncObservable，从错误中恢复后启用按钮。

使用 CreateAsyncTask，按钮被禁用。

除了使用CreateAsyncObservable（逻辑已经写成异步方法），错误后如何重新启用按钮？

Answer 1

我使用的调用方法签名导致了问题。

    private Task<Unit> DeleteImpl()
    {
        throw new NotImplementedException();
    }

缺少 async 关键字

将方法更改为

    private async Task<Unit> DeleteImpl()
    {
        throw new NotImplementedException();
    }

ReactiveCommand.CreateAsyncTask 的 ReactiveUI 异常句柄恢复

ReactiveUI exception handle recovery for ReactiveCommand.CreateAsyncTask

reactiveui