問題描述

聽說Json.NET比DataContractJsonSerializer快，想試一試……

I have heard that Json.NET is faster than DataContractJsonSerializer, and wanted to give it a try...

但我在 JsonConvert 上找不到任何采用流而不是字符串的方法.

But I couldn't find any methods on JsonConvert that take a stream rather than a string.

以在WinPhone上反序列化包含JSON的文件為例，我使用以下代碼將文件內容讀入字符串，然后反序列化為JSON.在我的(非常臨時的)測試中，它似乎比使用 DataContractJsonSerializer 直接從流中反序列化慢了大約 4 倍......

For deserializing a file containing JSON on WinPhone, for example, I use the following code to read the file contents into a string, and then deserialize into JSON. It appears to be about 4 times slower in my (very ad-hoc) testing than using DataContractJsonSerializer to deserialize straight from the stream...

// DCJS
DataContractJsonSerializer dc = new DataContractJsonSerializer(typeof(Constants));
Constants constants = (Constants)dc.ReadObject(stream);

// JSON.NET
string json = new StreamReader(stream).ReadToEnd();
Constants constants = JsonConvert.DeserializeObject<Constants>(json);

我做錯了嗎?

推薦答案

更新: 這在當前版本中不再有效，請參閱 下方獲取正確答案(無需投票，這在舊版本上是正確的).

UPDATE: This no longer works in the current version, see below for correct answer (no need to vote down, this is correct on older versions).

將 JsonTextReader 類與 StreamReader 一起使用，或直接使用采用 StreamReader 的 JsonSerializer 重載:

Use the JsonTextReader class with a StreamReader or use the JsonSerializer overload that takes a StreamReader directly:

var serializer = new JsonSerializer();
serializer.Deserialize(streamReader);

這篇關于Json.NET 可以對流進行序列化/反序列化嗎?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！