我正在从一些C#代码调用Web服务。这段代码看起来像这样:
using (var client = new HttpClient())
{
var page = "http://en.wikipedia.org/";
using (var response = await client.GetAsync(page))
{
using (var content = response.Content)
{
var result = await content.ReadAsStringAsync();
}
}
}
我想在实用程序方法中执行此代码。根据我的理解,Action委托适合于此。我尝试使用以下方法执行此操作:
Action action = delegate()
{
using (var client = new HttpClient())
{
var page = "http://en.wikipedia.org/";
using (var response = await client.GetAsync(page))
{
using (var content = response.Content)
{
var result = await content.ReadAsStringAsync();
}
}
}
}
当我将Web服务代码包装在Action委托中时,我收到一个编译时错误,指出:
The 'await' operator can only be used within an async anonymous method. Consider marking this anonymous method with the 'async' modifier.
我的问题是,如何在Action中调用异步代码?看来我做不到。如果我无法通过另一种方法将代码块传递给实用程序方法来执行?看起来像什么?
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