动态解析json消息到poco对象

Question

我有这种方法来解析JSON响应消息到特定的poco对象。

是否可以通过在运行时添加类类型并将此方法用于多个类的方式进行更改。

private static async Task<TestClass> ParseResponseMessageToObject(HttpResponseMessage responseMessage)
{
    if (!responseMessage.IsSuccessStatusCode) { return null; }

    using (Stream responseStream = await responseMessage.Content.ReadAsStreamAsync())
    {
        return (TestClass)JsonConvert.DeserializeObject(new StreamReader(responseStream).ReadToEnd(), typeof(TestClass));
    }
}

Answer 1

我想你想要这样的东西

private static async Task<T> ParseResponseMessageToObject<T>(HttpResponseMessage responseMessage)
{
    if (!responseMessage.IsSuccessStatusCode) { return default(T); }

    using (Stream responseStream = await responseMessage.Content.ReadAsStreamAsync())
    {
        return JsonConvert.DeserializeObject<T>(new StreamReader(responseStream).ReadToEnd());
    }
}

如果在编译时不知道使用的类型，则可以使用动态

dynamic dynObj = JsonConvert.DeserializeObject(jsonstring);
int i = dynObj.SomeIntProperty

由于JObject实现IDictionary，因此您也可以将其用作

var  dynObj = JObject.Parse(jsonstring);
int i = (int)dynObj["SomeIntProperty"];

Answer 2

您应该将方法更改为更通用

private static async Task<T> ParseResponseMessageToObject<T>(HttpResponseMessage responseMessage) where T : class, new()
    {
        if (!responseMessage.IsSuccessStatusCode) { return null; }

        using (Stream responseStream = await responseMessage.Content.ReadAsStreamAsync())
        {
            return (T)JsonConvert.DeserializeObject(new StreamReader(responseStream).ReadToEnd(), typeof(T));
        }
    }