框架4.5中的c#ReadAsJsonAsync

您只需安装 Newtonsoft.Json NuGet包并实现 ReadAsJsonAsync 自己扩展方法。这很简单:

public static class HttpClientExtensions
{
    public static async Task<T> ReadAsJsonAsync<T>(this HttpContent content)
    {
        var dataAsString = await content.ReadAsStringAsync();
        return Newtonsoft.Json.JsonConvert.DeserializeObject<T>(dataAsString);
    }
}

顺便说一下,您应该等待异步方法,而不是在 Result 财产:

value = await response.Content.ReadAsJsonAsync<R>();