How can i read json with comment with Json.NET
In order to install an external extension into Google Chrome browser, I try to update chrome external extension json file. Using Json.NET it seems to be easy:
string fileName = "..."; // path to chrome external extension json file
string externalExtensionsJson = File.ReadAllText(fileName);
JObject externalExtensions = JObject.Parse(externalExtensionsJson);
but I get a Newtonsoft.Json.JsonReaderException saying:
"Error parsing comment. Expected: *, got /. Path '', line 1, position 1."
when calling JObject.Parse because this file contains:
// This json file will contain a list of extensions that will be included
// in the installer.
{
}
and comments are not part of json (as seen in How do I add comments to Json.NET output?).
I know I can remove comments with a Regex (Regex to remove javascript double slash (//) style comments) but I need to rewrite json into file after modification and keeping comment can be a good thinks.
Question : Is there a way to read json with comments without removing them and be able to rewrite them?
Json.NET only supports reading multi-line JavaScript comments, ie /* commment */
Update: Json.NET 6.0 supports single line comments
A little late but you could always convert single-line comments to multi-line comment syntax before parsing...
something like replace...
.*//.*n
with
$1/*$2*/
...
Regex.Replace(subjectString, ".*//.*$", "$1/*$2*/");
如果你使用JavascriptSerializer（来自System.Web.Script.Serialization命名空间），我发现这个工作足够好...
private static string StripComments(string input)
{
// JavaScriptSerializer doesn't accept commented-out JSON,
// so we'll strip them out ourselves;
// NOTE: for safety and simplicity, we only support comments on their own lines,
// not sharing lines with real JSON
input = Regex.Replace(input, @"^s*//.*$", "", RegexOptions.Multiline); // removes comments like this
input = Regex.Replace(input, @"^s*/*(s|S)*?*/s*$", "", RegexOptions.Multiline); /* comments like this */
return input;
}