ArgumentNullException

This topic has 0 replies, 2 voices, and was last updated 11 years, 3 months ago by Gavalakis.

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February 24, 2015 at 6:29 pm #19302

radu

Participant

I’m trying to create and bind a blackboard property. I have a view called GuardView which has this

public bool HeroVisible { get; private set; }

Once I add a bool blackboard property and bind it to this HeroVisible property and try to run the project, I get this:

ArgumentNullException: Argument cannot be null.
Parameter name: method
System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method, Boolean throwOnBindFailure) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System/Delegate.cs:173)
System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System/Delegate.cs:276)
NodeCanvas.NCReflection.NCCreateDelegate (System.Reflection.MethodInfo method, System.Type type, System.Object instance) (at Assets/NodeCanvas/Core/Other/NCReflection.cs:252)
NodeCanvas.NCReflection.NCCreateDelegate[Action1] (System.Reflection.MethodInfo method, System.Object instance) (at Assets/NodeCanvas/Core/Other/NCReflection.cs:245) NodeCanvas.Variables.VariableData1[System.Boolean].InitBinding (UnityEngine.GameObject go) (at Assets/NodeCanvas/Core/Blackboard/VariableData.cs:121)
NodeCanvas.Blackboard.Awake () (at Assets/NodeCanvas/Core/Blackboard/Blackboard.cs:137)

For now I’m using ScriptControl->CheckProperty instead of BlackBoard->CheckBoolean as a workaround.

Am I missing something?

February 24, 2015 at 8:33 pm #19303

Gavalakis

Keymaster

Hello,

I wasn’t checking for whether or not the accessor is private. Here is the fix.

Please replace VariableData.cs InitBinding method at line #111 with the following:

///Set the gameobject target for property binding.

public override void InitBinding(GameObject go){

if (hasBinding && Application.isPlaying){

getter = null;

setter = null;

var arr = _propertyPath.Split('.');

var comp = go.GetComponent( arr[0] );

if (comp != null){

var prop = comp.GetType().NCGetProperty(arr[1]);

if (prop != null){

if (prop.CanRead){

MethodInfo getMethod = null;

#if NETFX_CORE

getMethod = prop.GetMethod;

#else

getMethod = prop.GetGetMethod();

#endif

if (getMethod != null){

getter = getMethod.NCCreateDelegate<System.Func<T>>(comp);

} else {

Debug.Log(string.Format("Binded Property '{0}' on '{1}' get accessor is private. Get binding ignored", prop.Name, comp.GetType().Name));

}

if (prop.CanWrite){

MethodInfo setMethod = null;

#if NETFX_CORE

setMethod = prop.SetMethod;

#else

setMethod = prop.GetSetMethod();

#endif

if (setMethod != null){

setter = setMethod.NCCreateDelegate<System.Action<T>>(comp);

} else {

Debug.Log(string.Format("Binded Property '{0}' on '{1}' set accessor is private. Set binding ignored", prop.Name, comp.GetType().Name));

}

Cheers!

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