使用动态变量处理内部类型时,c#RuntimeBinderException。我该如何解决?

时间:2019-02-21 14:47:39

标签: c# dynamic autocad access-modifiers autocad-plugin

我在当前正在编写的附件中使用未完全公开的API。尽管某些公共方法需要这些类型的参数,但其中的某些类仍保留在内部。

为解决该问题,我尝试将动态类型与帮助程序DymamicObject实现一起使用。我这样做非常成功,但是有一次我得到了RuntimeBinderException,它没有告诉我确切的细节: “对于Autodesk.Civil.DatabaseServices.PressurePipeNetwork.AddLinePipe(Autodesk.AutoCAD.Geometry.LineSegment3d,Autodesk.Civil.DatabaseServices.Styles.PressurePartSize)的最佳重载方法匹配具有一些无效的参数”。

在调试过程中,我可以看到我的动态变量属于预期类型,并且通常是有效对象-在其属性中包含预期信息。

如何解决该问题? 我如何检查此方法调用到底有什么问题?

在当前代码下方(AddLinePipe方法引发异常)

var network = (PressurePipeNetwork)tr.GetObject(networkId, OpenMode.ForWrite);

                var pressurePartList = doc.Styles.GetPressurePartListsExt() as StyleCollectionBase;
                var myListId = pressurePartList["My Parts"];
                var myList = tr.GetObject(myListId, OpenMode.ForRead);

                dynamic exposedPartsList = new ExposedPressureObject(myList);
                dynamic myPipes = exposedPartsList.GetParts(PressurePartDomainType.Pipe);
                dynamic myPipesExposed = new ExposedPressureObject(myPipes);
                dynamic pipe = myPipesExposed[0];

                LineSegment3d line = new LineSegment3d(new Point3d(30, 9, 0), new Point3d(33, 8, 0));
                //here is the public method, requirng a variable of internal type
                network.AddLinePipe(line, pipe);

以下DymamicObject的实现:

class ExposedPressureObject : DynamicObject
{
    private object _object;
    private IEnumerable<object> _listObject = new List<object>();

    public ExposedPressureObject(object obj)
    {
        System.Collections.IEnumerable enumerable = obj as System.Collections.IEnumerable;
        if (enumerable == null)
            _object = obj;
        else
            _listObject = enumerable.Cast<object>();
    }

    public override bool TryInvokeMember(
            InvokeMemberBinder binder, object[] args, out object result)
    {
        // Find the called method using reflection
        var methodInfo = _object.GetType().GetMethod(
            binder.Name,
            new[] { args[0].GetType() });

        // Call the method
        result = methodInfo.Invoke(_object, args);
        return true;
    }

    public override bool TryGetMember(GetMemberBinder binder, out object result)
    {
        PropertyInfo propInfo = _object.GetType().GetProperty(binder.Name,
            BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);
        result = propInfo.GetValue(_object , null);
        return true;
    }

    public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
    {
        int index = (int)indexes[0];
        result = _listObject.ToList()[index];
        return true;
    }
}

0 个答案:

没有答案