Json array Deserialization Issue in C#

Question

I have a Web API method to mapping a Json array to C# object.

My parameter should be like the following:

[{"event":"inbound","msg":"TestMEssage","ts":123456}]

and my code is

var events = JsonConvert.DeserializeObject<IEnumerable<MailEvent>>(mandrill_inbound);
public class MailEvent
    {

        [JsonProperty(PropertyName = "event")]
        public string Event { get; set; }

        [JsonProperty(PropertyName = "msg")]
        public string Msg { get; set; }

        [JsonProperty(PropertyName = "ts")]
        public string TimeStamp { get; set; }
    }

But when am trying to Deserialize the JSON it's showing exception.

But If I am trying to set a variable inside the method like

Public const string mandrill_inbound = @"[
    {
        ""event"": ""inbound"",
        ""msg"": ""tewst"",
        ""ts"": 1368214102
    },
    {
        ""event"": ""inbound"",
        ""msg"": ""test2"",
        ""ts"": 1368214102
    }
]";

This code will be working perfectly for me.

Noting that it has starting with @"" and all the key values are surrounded with multiple Double quotes(""event"").

Actually what is the difference between these two formats.

Any help will be appreciated.

"it's showing exception" - what exception? Any time you mention an error in a Stack Overflow question, please show what the exception is. I strongly suspect that the string you're deserializing in the error case isn't what you think it is. Unfortunately we don't know anything about how you're receiving that string, or what you've done to log the value you're receiving. — Jon Skeet
– Jon Skeet, Commented Dec 7, 2019 at 7:56

Tubc · Accepted Answer · 2019-12-07 09:57:15Z

1

This is literally the same string without needing to escape anything.

That is the @ indicates that the string is declared as is, ignoring any and all characters that in a normal string would indicate some escape.

The only exception is the double arrow Quote. The double quote needs to be escaped when the string is prefixed by @. The way to do this, is by using ""

So the same string without @ would be

Public const string mandrill_inbound = "[\n" +
"{\n" +
    "\"event\": \"inbound\",\n" +
    "\"msg\": \"tewst\",\n" +
    "\"ts\": 1368214102\n" +
"},\n" +
"{\n" +
    "\"event\": \"inbound\",\n" +
    "\"msg\": \"test2\",\n" +
    "\"ts\": 1368214102\n" +
"}]";

The string above should also work. What is the exception you are getting?

edited Dec 7, 2019 at 9:57

Tubc

4164 silver badges21 bronze badges

answered Dec 7, 2019 at 7:53

Athanasios Kataras

26.7k6 gold badges40 silver badges67 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Ajas Aju · Accepted Answer · 2019-12-07 10:07:10Z

Finally, I found the Issue,

It appears that the JSON I receive has been serialized twice, No idea from where this happened.The first double-quote might be added by your debugger, but the second (the escaped \" one) really appears to be part of the data you're processing. The error message also makes sense this way, it deserializes a string and then attempts to cast it to an ApiResult.

"\"{\\"event\\":\\"Inbound\\",\\"msg\\":...

Try deserializing the data as a string and then deserializing its result to an ApiResult

   var content = response.Content;              
   var jsonResult = JsonConvert.DeserializeObject(content).ToString();
   var result= JsonConvert.DeserializeObject<Model>(jsonResult);

Collectives™ on Stack Overflow

Json array Deserialization Issue in C#

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related