Json Serialization problem with .net

Question

1.33/5 (2 votes)

See more:

i am using Newtonsoft json V 6.0.0 with C# i am serializing object using json.

My object contains various type of collection and i am serializing object after finish all search and getting response. Even i am getting exception

"System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)
at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType)
at Newtonsoft.Json.JsonConvert.SerializeObjectInternal(Object value, Type type, JsonSerializer jsonSerializer)"

I am not able to track the object which is modifying during serialization. in my code serialization is running in thread in high frequency.

my code is

C#

var Jsonsettings = new JsonSerializerSettings
           {
               NullValueHandling = NullValueHandling.Ignore,
               DefaultValueHandling = DefaultValueHandling.Ignore,
               ContractResolver = new WBContractResolver()
           };

var SerializedJson = JsonConvert.SerializeObject(this, Jsonsettings);

Thanks in advance !!!

Java

Posted 7-May-15 2:20am

Sudheer Kumar Tiwari

Add a Solution

Comments

Richard Deeming 7-May-15 8:41am

"serialization is running in thread"

Are you trying to serialize a collection on one thread, whilst modifying it on another?

Unless you're using one of the concurrent collections[^] (or the immutable collections[^] available from NuGet), that won't work.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

be.bart · Answer 1 · 2015-05-07T03:13:00

Solution 1

The first line of the error message says that the collection was modified during serialization. Do you use a loop that removes items from this collection during serialization? Or is there another thread removing items from the collection?

Posted 7-May-15 3:13am

be.bart

Comments

Sudheer Kumar Tiwari 7-May-15 9:38am

Hi bart;

i am not using any loop. I have use null handling and default handling in json setting may be it will be looping internally on object.
how we can handle this exception.