JsonConvert.SerializeObject add backslashes to quotes

Question

I am sending a message from my C# Windows Service to Amazon Web Services SNS so that it can be received from an iOS application.

PublishRequest pubRequest = new PublishRequest();
pubRequest.TargetArn = arn;

pubRequest.Message = JsonConvert.SerializeObject(myMessage, Formatting.Indented);
pubRequest.MessageStructure = "json";

When I use JsonConvert.SerializeObject this produces a mesage string like so:

{"default":"My Message.  ","APNS":{"aps":{"alert":{"title":"My Title","body":"MyBody data"},"data":{"someDataTolookAt":"blahblah"}}}}

BUT I need the quotes in the APNS part to be escaped like so:

{"default":"My Message.  ","APNS":{\"aps\":{\"alert\":{\"title\":\"My Title\","body\":\"MyBody data\"},\"data\":{\"someDataTolookAt\":\"blahblah\"}}}}

How can I do this?

Write your own JSON converter. [See example here](https://www.newtonsoft.com/json/help/html/CustomJsonConverter.htm) — Oram, Sep 27 '18 at 10:20
[Also see this](https://stackoverflow.com/questions/36474609/c-sharp-format-json-with-backslash-in-value/36474971) — Hary, Sep 27 '18 at 10:21
I'm just curious... Why would you need a serialized format like that? That's even not a valid json. Did you mean you want APNS part to be a string instead of an object? — Alan haha, Sep 27 '18 at 10:33
For some reason AWS is only forwarding the default part of the message and not the APNS part. From this example I believe that back slashes are required https://docs.aws.amazon.com/sns/latest/dg/SNSMobilePushAPNSAPI.html — Harry Boy, Sep 27 '18 at 10:42
@HarryBoy if you look more carefully docs provide valid json with quotes around { and } — Access Denied, Sep 27 '18 at 10:48
"APNS_SANDBOX":"{ \"aps\" : { \"alert\" : \"You have got email.\", \"badge\" : 9,\"sound\" :\"default\"}}" — Access Denied, Sep 27 '18 at 10:48

score 2 · Answer 1 · answered Sep 27 '18 at 10:26

In fact API expects APNS serialized as string, not as json and you need to convert its value to json string. Create custom JSON converter for this particular property.

[JsonConverter(typeof(MyJsonConverter))]
someclass APNS {get;set;}

This converter will also do JsonConvert.SerializeObject(APNSobject) => hence your json will have escaped string for apns object.

JsonConvert.SerializeObject add backslashes to quotes

1 Answers1