How to serialize/deserialize List<Tuple<long, string, int>> using JavaScriptSerializer

Question

I have serialized a List<Tuple<long, string, int>> obj using JavaScriptSerializer.

JavaScriptSerializer js = new JavaScriptSerializer();
return js.Serialize(dataToSerialize as IEnumerable); 

and I got the string:

[{"Item1":0,"Item2":"UserModifiedId","Item3":1},{"Item1":-1,"Item2":"","Item3":0},{"Item1":-1,"Item2":"","Item3":0}]

When I try to deserialize it using:

JavaScriptSerializer js = new JavaScriptSerializer();
return js.Deserialize<List<T>>(strObject);

I get the following ex:

No parameterless constructor defined for type of 'System.Tuple`3[[System.Int64, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]'.```

Can anyone help me with this Issue (to keep using JavaScriptSerializer)?

Answer 1

The JavaScriptSerializer needs a parameterless constructor to create the objects during deserialization.

Because the class Tuple has none, the deserialization fails.

If you don't bother you can use the NuGet package Newtonsoft.Json, which doesn't have his problem:

var strObject= JsonConvert.SerializeObject(dataToSerialize);

var tupleList = JsonConvert.DeserializeObject<List<Tuple<long, string, int>>>(strObject);