如何在不运行任务的情况下将Action转换为func？

Question

我有代码，工作完全按要求。但是，我们的企业构建服务器拒绝任何带有编译器警告的签入。

由于我没有使用await语句，因此（如预期的那样）对于带有操作to Func转换的操作构造函数显示了以下警告。

public class TransactionOperation
{
    private readonly Func<Task> _operation;
    private readonly Func<Task> _rollback;

    public OperationStatus Status { get; private set; }

    public TransactionOperation(Func<Task> operation, Func<Task> rollback)
    {
        _operation = operation;
        _rollback = rollback;
        Status = OperationStatus.NotStarted;
    }

    public TransactionOperation(Action operation, Action rollback)
    {
        _operation = async () => operation.Invoke();
        _rollback = async () => rollback.Invoke();
        Status = OperationStatus.NotStarted;
    }

    public async Task Invoke()
    {
        try
        {
            Status = OperationStatus.InProcess;
            await _operation.Invoke();
            Status = OperationStatus.Completed;
        }
        catch (Exception ex)
        {
            //...
        }
    }
}

更新-建议答案#1

_operation=()=>new Task（operation.invoke）；

_rollback=()=>new Task(rollback.invoke)；

[TestMethod, TestCategory("Unit Test")]
public async Task Transaction_MultiStepTransactionExceptionOnFourthAction_CorrectActionsRolledBack()
{
    var operation = new TransactionOperation(PerformAction, () => RollbackOperation(1));
    var operation2 = new TransactionOperation(PerformAction, () => RollbackOperation(2));
    var operation3 = new TransactionOperation(PerformAction, () => RollbackOperation(3));
    var operation4 = new TransactionOperation(ExceptionAction, () => RollbackOperation(4));
    var operation5 = new TransactionOperation(PerformAction, () => RollbackOperation(5));
    var transaction = new Transaction(new[] { operation, operation2, operation3, operation4, operation5 });

    await IgnoreExceptions(transaction.ExecuteAsync);

    AssertActionsPerformedThrough(4);
    AssertActionsRolledBackThrough(4);
}

更新-接受的答案

private async Task ConvertToTask(Action action)
{
    action.Invoke();
    await Task.FromResult(true);
}

以下是更新后的操作构造函数：

public TransactionOperation(Action operation, Action rollback)
{
    _operation = () => ConvertToTask(operation);
    _rollback = () => ConvertToTask(rollback);
    Status = OperationStatus.NotStarted;
}

Answer 1

您只需使用task.FromResult(0):

_operation = async () => { operation.Invoke(); await Task.FromResult(0); };