CODEWITHSUNDEEP
c#xmlinvalidoperationexception
Plugin4U
Plugin4U

Reputation: 1

Invalid operation exception , C# XML Error

Heyo, I am making a plugin for unity game(error below) so I am probably making this for my main plugin and read ranks. I dont know what is the error and I dont see any posts about this. This is my error : 

[XmlArrayItem(ElementName = "Rank")]
public List<Rank> Ranks;
public void LoadDefaults()
{
    Ranks = new List<Rank>() {
    new Rank() { RankNumber = 0, GroupID = "Default" ,Messages = new List<Message>() { new Message("yo") , new Message("yo")}}
    };
}
public class Rank
{
    public Rank() { }

    public int RankNumber;
    public string GroupID;
    public List<Message> Messages;
}
public class Message
{
    public Message(string Rankmessage) { Rankmessage = RankMessage; }
    [XmlAttribute("RankMessage")]
    public string RankMessage;
}

Error:

[2/3/2017 7:47:23 PM] [Error] InvalidOperationException: RanksUnlocker.RanksUnlockerConfig+Message cannot be serialized because it does not have a default public constructor - System.Xml.Serialization.ReflectionHelper.CheckSerializableType (System.Type type, Boolean allowPrivateConstructors)
System.Xml.Serialization.XmlReflectionImporter.ImportClassMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
Rethrow as InvalidOperationException: There was an error reflecting type 'RanksUnlocker.RanksUnlockerConfig+Message'.
System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping (System.Type type, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
System.Xml.Serialization.XmlReflectionImporter.ImportListMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace, System.Xml.Serialization.XmlAttributes atts, Int32 nestingLevel)
System.Xml.Serialization.XmlReflectionImporter.ImportListMapping (System.Type type, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace, System.Xml.Serialization.XmlAttributes atts, Int32 nestingLevel)
System.Xml.Serialization.XmlReflectionImporter.CreateMapMember (System.Type declaringType, System.Xml.Serialization.XmlReflectionMember rmember, System.String defaultNamespace)
System.Xml.Serialization.XmlReflectionImporter.ImportClassMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
Rethrow as InvalidOperationException: There was an error reflecting field 'Messages'.
System.Xml.Serialization.XmlReflectionImporter.ImportClassMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
Rethrow as InvalidOperationException: There was an error reflecting type 'RanksUnlocker.RanksUnlockerConfig+Rank'.
System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping (System.Type type, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
System.Xml.Serialization.XmlReflectionImporter.ImportListMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace, System.Xml.Serialization.XmlAttributes atts, Int32 nestingLevel)
System.Xml.Serialization.XmlReflectionImporter.ImportListMapping (System.Type type, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace, System.Xml.Serialization.XmlAttributes atts, Int32 nestingLevel)
System.Xml.Serialization.XmlReflectionImporter.CreateMapMember (System.Type declaringType, System.Xml.Serialization.XmlReflectionMember rmember, System.String defaultNamespace)
System.Xml.Serialization.XmlReflectionImporter.ImportClassMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
Rethrow as InvalidOperationException: There was an error reflecting field 'Ranks'.
System.Xml.Serialization.XmlReflectionImporter.ImportClassMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
Rethrow as InvalidOperationException: There was an error reflecting type 'RanksUnlocker.RanksUnlockerConfig'.
System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping (System.Xml.Serialization.TypeData typeData, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping (System.Type type, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
System.Xml.Serialization.XmlSerializer..ctor (System.Type type, System.Xml.Serialization.XmlAttributeOverrides overrides, System.Type[] extraTypes, System.Xml.Serialization.XmlRootAttribute root, System.String defaultNamespace)
System.Xml.Serialization.XmlSerializer..ctor (System.Type type, System.Type[] extraTypes)
Rocket.Core.Assets.XMLFileAsset`1[RanksUnlocker.RanksUnlockerConfig]..ctor (System.String file, System.Type[] extraTypes, RanksUnlocker.RanksUnlockerConfig defaultInstance)
Rocket.Core.Plugins.RocketPlugin`1[RocketPluginConfiguration]..ctor ()
RanksUnlocker.RanksUnlocker..ctor ()
UnityEngine.GameObject:.ctor(String, Type[])
Rocket.Core.Plugins.RocketPluginManager:loadPlugins()
Rocket.Core.Plugins.RocketPluginManager:Start()

Upvotes: 1

Views: 730

Answers (1)

Chris Nielsen
Chris Nielsen

Reputation: 14758

You need to add a constructor to the Message class. It needs to be public and it needs to accept zero parameters.

The the existing constructor that you already have won't work for this because the XML serialization process doesn't know how to handle a constructor that takes a parameter. You can keep your existing constructor too, just add a new one that doesn't take a parameter.

Upvotes: 1

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