How to JSON serialize math vector type in F#?
- by The_Ghost
Hello!
I'm trying to serialize "vector" (Microsoft.FSharp.Math) type. And I get that error:
Exception Details: System.Runtime.Serialization.SerializationException: Type 'Microsoft.FSharp.Math.Instances+FloatNumerics@115' with data contract name 'Instances.FloatNumerics_x0040_115:http://schemas.datacontract.org/2004/07/Microsoft.FSharp.Math' is not expected. Add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer.
I have tried to put KnownType attribute and some other stuff, but nothing helps!
Could someone know the answer?
This is the code I use:
// [< KnownType( typeof<vector> ) >]
type MyType = vector
let public writeTest =
let aaa = vector [1.1;2.2]
let serializer = new DataContractJsonSerializer( typeof<MyType> )
let writer = new StreamWriter( @"c:\test.txt" )
serializer.WriteObject(writer.BaseStream, aaa)
writer.Close()
