Problems with Json Serialize Dictionary<Enum, Int32>
- by dbemerlin
Hi,
whenever i try to serialize the dictionary i get the exception:
System.ArgumentException: Type
'System.Collections.Generic.Dictionary`2[[Foo.DictionarySerializationTest+TestEnum, Foo, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]'
is not supported for serialization/deserialization of a dictionary,
keys must be strings or object
My Testcase is:
public class DictionarySerializationTest
{
private enum TestEnum { A, B, C }
public void SerializationTest()
{
Dictionary<TestEnum, Int32> data = new Dictionary<TestEnum, Int32>();
data.Add(TestEnum.A, 1);
data.Add(TestEnum.B, 2);
data.Add(TestEnum.C, 3);
JavaScriptSerializer serializer = new JavaScriptSerializer();
String result = serializer.Serialize(data);
// Throws
}
public void SerializationStringTest()
{
Dictionary<String, Int32> data = new Dictionary<String, Int32>();
data.Add(TestEnum.A.ToString(), 1);
data.Add(TestEnum.B.ToString(), 2);
data.Add(TestEnum.C.ToString(), 3);
JavaScriptSerializer serializer = new JavaScriptSerializer();
String result = serializer.Serialize(data);
// Succeeds
}
}
Of course i could use .ToString() whenever i enter something into the Dictionary but since it's used quite often in performance relevant methods i would prefer using the enum.
My only solution is using .ToString() and converting before entering the performance critical regions but that is clumsy and i would have to change my code structure just to be able to serialize the data.
Does anyone have an idea how i could serialize the dictionary as <Enum, Int32>?
I use the System.Web.Script.Serialization.JavaScriptSerializer for serialization.
