我如何通过异步方法，操作或FUNC。 [英] How do I pass async method as Action or Func

问题描述

我有我用实例化一个using语句里面我的DataContext一点实用方法。我想用一个异步方法调用但是在DataContext在方法返回前处理使用。什么是使用正确的方法？

I have a little utility method I use to instantiate my datacontext inside a using statement. I want to use this with an async method call however the datacontext is disposed before the method returns. What is the correct way to use this?

下面是方法（和重载）

    public void Try(Action<IDataServices> method)
    {
        using (IDataServices client = GetClient())
        {
            method(client);
        }
    }

    public TResult Try<TResult>(Func<IDataServices, TResult> method)
    {
        using (IDataServices client = GetClient())
        {
            return (TResult)method(client);
        }
    }

下面是如何，我currenty使用它（失败）：

Here is how I am currenty using it (fails):

    Model m = await ClientResolver.Try(async x => await x.GetModelByIDAsync(modelID));

参考：结果
<一href=\"http://stackoverflow.com/questions/20431528/calling-asynchronous-method-in-using-statement\">Calling在using语句异步方法

推荐答案

您错过任务返回类型：

public async Task<TResult> Try<TResult>(Func<IDataServices, Task<TResult>> method)
{
    using (IDataServices client = GetClient())
    {
        return (TResult)await method(client)
    }
}

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