可以Json.NET序列化/反序列化从流/？ [英] Can Json.NET serialize / deserialize to / from a stream?

问题描述

我听说Json.NET比DataContractJsonSerializer快，想给它一个尝试...

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

但我无法找到JsonConvert称取流，而不是一个字符串的方法。

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

有关反序列化包含JSON上WinPhone一个文件，例如，我用下面的code读取文件内容转换为字符串，然后反序列化到JSON。这似乎是约4倍慢于我的（非常特别）测试比使用DataContractJsonSerializer从流直反序列...

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);

难道我做错了？

Am I doing it wrong?

谢谢

暗利。

推荐答案

更新：：此不再在当前版本的作品，看的下面为正确答案（没必要否决，这是正确的旧版本）。

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).

使用了 JsonTextReader 类与的StreamReader 或 JsonSerializer 重载需要一个的StreamReader 直接：

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

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

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