如何使用 AsyncLazy 调用非静态方法

Question

DoStuffOnlyOnceAsync我必须尝试调用 using的非静态方法AsyncLazy，但出现错误。如何调用非静态方法？字段初始值设定项不能引用非静态字段、方法或属性“TestClass.DoStuffOnlyOnceAsync()” using System; using System.Runtime.CompilerServices; using System.Threading.Tasks; namespace Registry{public class AsyncLazy<T> : Lazy<Task<T>>{    public AsyncLazy(Func<T> valueFactory) : base(() => Task.Run(valueFactory)) { }    public AsyncLazy(Func<Task<T>> taskFactory) : base(() => Task.Run(() => taskFactory())) { }    public TaskAwaiter<T> GetAwaiter() { return Value.GetAwaiter(); }}public class TestClass{    private AsyncLazy<bool> asyncLazy = new AsyncLazy<bool>(async () =>    {        await DoStuffOnlyOnceAsync();        return true;    });    public TestClass() { }    public async Task DoStuffOnlyOnceAsync()    {        await Task.FromResult(false);    }}}

Answer 1

限制是字段初始值设定项不能调用任何非静态方法。AsyncLazy<T>对于任何字段初始值设定项都是如此，与or无关async。

要修复它，请在构造函数中初始化该字段：

public TestClass()

{

  asyncLazy = new AsyncLazy<bool>(async () =>

  {

    await DoStuffOnlyOnceAsync();

    return true;

  });

}