[英]Pass a type as parameter to method
我有一個叫做RootObject
的類:
public class RootObject
{
public string Name { get; set; }
public int Age { get; set; }
public int Address { get; set; }
}
public void getdata()
{
WebRequest request = WebRequest.Create("http://addresstojson.com/json.json");
WebResponse response = await request.GetResponseAsync();
using (var stream = new StreamReader(response.GetResponseStream()))
{
json = JsonConvert.DeserializeObject<RootObject>(stream.ReadToEnd());
}
}
在getdata()
方法的最后一條語句中,傳遞類型:
JsonConvert.DeserializeObject</*here*/>(Stream.ReadToEnd())
我想將類型作為參數傳遞給getdata(RootObject)
方法。
有沒有辦法在C#中使用泛型呢?
實現強類型反序列化的標准方法是:
public T Get<T>()
{
string json = ...; // get data somehow
return JsonConvert.DeserializeObject<T>(json);
}
看起來您想異步讀取結果,因此您實際上需要將結果作為Task<T>
,並使用讀取數據的方法的xxxxAsync
版本:
public Task<T> GetData<T>()
{
WebRequest request = WebRequest.Create("http://addresstojson.com/json.json");
using (WebResponse response = await request.GetResponseAsync())
{
using(var stream = new StreamReader(response.GetResponseStream()))
{
string json = await stream.ReadToEndAsync();
T result = JsonConvert.DeserializeObject<T>();
return result;
}
}
}
您可以在此處了解有關泛型的更多信息: https : //msdn.microsoft.com/zh-cn/library/512aeb7t.aspx
public static async Task<T> GetData<T>(string add)
{
WebRequest request = WebRequest.Create(add);
WebResponse response = await request.GetResponseAsync();
using (var stream = new StreamReader(response.GetResponseStream()))
{
return JsonConvert.DeserializeObject<T>(stream.ReadToEnd());
}
}
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