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c#jsonserializationdictionary
Mark Richman
Mark Richman

Reputation: 29710

C# Serialize Dictionary<ulong,ulong> to JSON

I am trying to serialize a Dictionary to JSON, and get the following exception:

new JavaScriptSerializer().Serialize(mydict)`

Type 'System.Collections.Generic.Dictionary`2[[System.UInt64, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Nullable`1[[System.UInt64, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]], mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]' is not supported for serialization/deserialization of a dictionary, keys must be strings or objects.

Is there an easy way to do this? Maybe converting the ulongs to strings via LINQ or something relatively terse?

Upvotes: 10

Views: 9384

Answers (3)

Binod Mahto
Binod Mahto

Reputation: 359

use NewtonSoft.Json instead of JavaScriptSerializer to overcome this problem:

Ex: 

JsonConvert.SerializeObject(mydict);

Upvotes: 3

Mark Richman
Mark Richman

Reputation: 29710

var dict = mapping.ToDictionary(item => item.Key.ToString(), item => item.Value.ToString());`

that will convert any Dictionary<K,V> to Dictionary<string,string> and serialization then works.

Upvotes: 18

Michael Freidgeim
Michael Freidgeim

Reputation: 28445

The blog http://dukelupus.wordpress.com/2011/05/04/asp-net-mvc-json-and-a-generic-dictionary/ describes an extension method Dictionary ToJsonDictionary(this Dictionary input)

Upvotes: 1

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