使用JsonConvert反序列化单个DateTime对象 [英] Deserialize a single DateTime object with JsonConvert

问题描述

上下文

JsonConvert.SerializeObject(DateTime.Now)行给出以下结果:

"2018-05-25T07:59:27.2175427 + 02:00"

但是，当我尝试使用以下行将这个JSON字符串反序列化为DateTime时:JsonConvert.DeserializeObject<DateTime>("2018-05-25T07:59:27.2175427+02:00")

它给出Newtonsoft.Json.JsonReaderException并显示以下消息:

解析值时遇到意外字符:2.路径"，第1行，位置1.

到目前为止我还尝试了什么

"2018-05-25T07:59:27"

导致完全相同的异常

问题

具有JSON序列化格式的datetime字符串，我想在其中包含一个DateTime变量和正确的值.我该如何完成这项任务?

解决方案

如 JSON标准所示，必须用JSON字符串文字加引号:

A string是零个或多个Unicode字符的序列，使用反斜杠转义符将其括在双引号中.字符表示为单个字符串.字符串非常类似于C或Java字符串.

因此，要成为有效的JSON，您的c#字符串文字必须包含周围的双引号，如下所示:

var dateTime = JsonConvert.DeserializeObject<DateTime>("\"2018-05-25T07:59:27.2175427+02:00\"");

很容易混淆最外层的引号，它们是c#语言的一部分，并在c#代码中分隔字符串，但不包含在字符串本身中，而内部的引号则是字符串文字本身的一部分. /p>

样本小提琴此处.

Context

The line JsonConvert.SerializeObject(DateTime.Now) gives the following result:

"2018-05-25T07:59:27.2175427+02:00"

However when I try to deserialize this JSON string to a DateTime with the line: JsonConvert.DeserializeObject<DateTime>("2018-05-25T07:59:27.2175427+02:00")

it gives an Newtonsoft.Json.JsonReaderException with the following message:

Unexpected character encountered while parsing value: 2. Path '', line 1, position 1.

What else I've tried so far

"2018-05-25T07:59:27"

causes the very same exception

Question

Having the datetime string in JSON serialized format, I would like to have a DateTime variable and the correct value in it. How can I accomplish this task?

解决方案

As shown in the JSON standard, a JSON string literal must be quoted:

A string is a sequence of zero or more Unicode characters, wrapped in double quotes, using backslash escapes. A character is represented as a single character string. A string is very much like a C or Java string.

Thus, to be valid JSON, your c# string literal must include the surrounding double quotes, like so:

var dateTime = JsonConvert.DeserializeObject<DateTime>("\"2018-05-25T07:59:27.2175427+02:00\"");

It's easy to confuse the outermost quotes, which are part of the c# language and delimit the string in your c# code but are not included in the string itself, with the inner quotes, which are part of the string literal itself.

Sample fiddle here.

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