5

クラスのライブラリを AutoCAD 図面にシリアル化および逆シリアル化できるコードを作成しようとしています。この質問は、通常の方法でデバッグできない理由以外に、AutoCAD とはほとんど関係がありません。この記事からこのプロジェクトを開始し、彼のコードを実行することに成功しました。ただし、彼のコードが構造化されている方法では、すべてのクラスを彼の baseobject から継承する必要があります。これは明らかにコードのにおいなので、代わりにインターフェイスを作成する必要があることはわかっていました。以下は、私が最終的に得たコードです。

この最初のセクションは、AutoCAD 図面へのシリアル化を行うコードです。

2 番目のセクションは、カスタムのシリアライゼーション インターフェイスを実装するクラスの例です。

public class Commands
{
    public class MyUtil
    {

        const int kMaxChunkSize = 127;

        public ResultBuffer StreamToResBuf(MemoryStream ms, string appName)
        {

            ResultBuffer resBuf = new ResultBuffer(new TypedValue((int)DxfCode.ExtendedDataRegAppName, appName));

            for (int i = 0; i < ms.Length; i += kMaxChunkSize)
            {

                int length = (int)Math.Min(ms.Length - i, kMaxChunkSize);

                byte[] datachunk = new byte[length];

                ms.Read(datachunk, 0, length);

                resBuf.Add(new TypedValue((int)DxfCode.ExtendedDataBinaryChunk, datachunk));
            }

            return resBuf;
        }

        public MemoryStream ResBufToStream(ResultBuffer resBuf)
        {

            MemoryStream ms = new MemoryStream();

            TypedValue[] values = resBuf.AsArray();

            // Start from 1 to skip application name

            for (int i = 1; i < values.Length; i++)
            {

                byte[] datachunk = (byte[])values[i].Value;

                ms.Write(datachunk, 0, datachunk.Length);

            }

            ms.Position = 0;

            return ms;

        }

        public void NewFromEntity(IClearspanSerializable objectToSave, Entity ent)
        {

            using (ResultBuffer resBuf = ent.GetXDataForApplication("Member"))
            {
                BinaryFormatter bf = new BinaryFormatter();

                bf.Binder = new MyBinder();

                MemoryStream ms = this.ResBufToStream(resBuf);
                objectToSave.SetObjectData(bf.Deserialize(ms));
            }

        }


        public void SaveToEntity(IClearspanSerializable objectToSave, Entity ent)
        {

            // Make sure application name is registered
            // If we were to save the ResultBuffer to an Xrecord.Data,
            // then we would not need to have a registered application name

            Transaction tr = ent.Database.TransactionManager.TopTransaction;

            RegAppTable regTable = (RegAppTable)tr.GetObject(ent.Database.RegAppTableId, OpenMode.ForWrite);

            if (!regTable.Has("Member"))
            {
                RegAppTableRecord app = new RegAppTableRecord();

                app.Name = "Member";

                regTable.Add(app);

                tr.AddNewlyCreatedDBObject(app, true);
            }


            BinaryFormatter bf = new BinaryFormatter();
            MemoryStream ms = new MemoryStream();

            bf.Serialize(ms, objectToSave);
            ms.Position = 0;

            ent.XData = this.StreamToResBuf(ms, "Member");;


        }
    }

    public sealed class MyBinder : SerializationBinder
    {
        public override Type BindToType(string assemblyName, string typeName)
        {
            return Type.GetType(string.Format("{0}, {1}",

              typeName, assemblyName));
        }
    }


    [CommandMethod("SaveClassToEntityXData", CommandFlags.Modal)]
    public void SaveClassToEntityXData(IClearspanSerializable objectToSerialize)
    {

        Database db = Application.DocumentManager.MdiActiveDocument.Database;
        Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

        PromptEntityResult per = ed.GetEntity("Select entity to save class to:\n");

        if (per.Status != PromptStatus.OK)
            return;

        MyUtil util = new MyUtil();



        // Save it to the document
        using (Transaction tr = db.TransactionManager.StartTransaction())
        {

            Entity ent = (Entity)tr.GetObject(per.ObjectId, OpenMode.ForWrite);

            util.SaveToEntity(objectToSerialize, ent);

            tr.Commit();
        }

        // Write some info about the results

        //ed.WriteMessage("Content of MyClass we serialized:\n {0} \n", mc.ToString());

    }


    [CommandMethod("GetClassFromEntityXData", CommandFlags.Modal)]
    public void GetClassFromEntityXData(IClearspanSerializable objectToRestore)
    {

        Database db = Application.DocumentManager.MdiActiveDocument.Database;
        Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

        MyUtil util = new MyUtil();

        PromptEntityResult per = ed.GetEntity("Select entity to get class from:\n");

        if (per.Status != PromptStatus.OK)
            return;

        // Get back the class
        using (Transaction tr = db.TransactionManager.StartTransaction())
        {
            Entity ent = (Entity)tr.GetObject(per.ObjectId, OpenMode.ForRead);
            util.NewFromEntity(objectToRestore, ent);

            tr.Commit();

        }

    }
}

これは私がテストしようとしているダミークラスです:

[Serializable]
public class MattMember: IClearspanSerializable
{
    public string Name;
    List<int> MattsInts;


    public MattMember(string passedName, List<int> passedInts)
    {
        Name = passedName;
        MattsInts = passedInts;
    }

    [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.SerializationFormatter)]
    public void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        info.AddValue("Name", Name);
        info.AddValue("MattsInts", MattsInts);
    }

    [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.SerializationFormatter)]
    public void SetObjectData(SerializationInfo info, StreamingContext context)
    {
        if (info == null)
        {
            throw new System.ArgumentNullException("info");
        }
        Name = (string)info.GetValue("Name", typeof(string));

        MattsInts = (List<int>)info.GetValue("MattsInts", typeof(List<int>));
    }


    void IClearspanSerializable.SetObjectData(object objectInDisguise)
    {


        if (objectInDisguise == null)
        {
            throw new System.ArgumentNullException("info");
        }

        MattMember objectToCopy = (MattMember)objectInDisguise;

        Name = objectToCopy.Name;

        MattsInts = objectToCopy.MattsInts;
    }
}

そしてここにインターフェースがあります：

public interface IClearspanSerializable
{
    void GetObjectData(SerializationInfo info, StreamingContext context);
    void SetObjectData(object objectInDisguise);
}

AutoCAD 内でコードを実行しようとすると、このエラーだけが表示されます。これにより、クラスの初期化に単純なバグがあると思われます。私のブレークポイントはヒットしません。

未処理の例外

これをどのようにデバッグすればよいですか? そして、どこで初期化を台無しにしましたか?

[編集]-「詳細」にあるものは次のとおりです。

******************************************************************************
Application does not support just-in-time (JIT)
debugging. See the end of this message for details.

************** Exception Text **************
System.ArgumentException: Cannot bind to the target method because its signature or security transparency is not compatible with that of the delegate type.
   at System.Delegate.CreateDelegate(Type type, Object firstArgument, MethodInfo method, Boolean throwOnBindFailure)
   at System.Delegate.CreateDelegate(Type type, Object firstArgument, MethodInfo method)
   at Autodesk.AutoCAD.Runtime.CommandClass.InvokeWorker(MethodInfo mi, Object commandObject, Boolean bLispFunction)
   at Autodesk.AutoCAD.Runtime.CommandClass.InvokeWorkerWithExceptionFilter(MethodInfo mi, Object commandObject, Boolean bLispFunction)
   at Autodesk.AutoCAD.Runtime.PerDocumentCommandClass.Invoke(MethodInfo mi, Boolean bLispFunction)
   at Autodesk.AutoCAD.Runtime.CommandClass.CommandThunk.Invoke()


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Write To Block
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************** JIT Debugging **************
Application does not support Windows Forms just-in-time (JIT)
debugging. Contact the application author for more
information.
4

4 に答える 4

1

System.ArgumentException: 署名またはセキュリティ透過性がデリゲート型のものと互換性がないため、ターゲット メソッドにバインドできません。

私の理解では、あなたのインターフェイスの「GetObjectData」メソッドは、BinnaryFormatter キッチンのどこかで ISerializable メソッドと競合しています。

MyUtil ですべての変換関数 (StreamToResBuf、ResBufToStream...) をリファクタリングするだけで、[Serializable] 属性でマークされたクラスをシリアル化/逆シリアル化できるはずです。
ダミー クラスは次のようになります (コレクションとプリミティブ型は自動シリアル化され、必要な場合にのみ ISerializable を実装します)。

[Serializable]
public class MattMember
{
    public string Name;
    List<int> MattsInts;
}

NewFromEntity メソッド (ここでは不要なキャストを避けてください) :

    public object NewFromEntity(Entity ent)
        {    
            using (ResultBuffer resBuf = ent.GetXDataForApplication("Member"))
            {
                BinaryFormatter bf = new BinaryFormatter();

                bf.Binder = new MyBinder();

                MemoryStream ms = this.ResBufToStream(resBuf);
                return bf.Deserialize(ms);
            }    
        }

そして最後にあなたのコマンド： 

[CommandMethod("GetClassFromEntityXData", CommandFlags.Modal)]
//Updated return type here but don't know if it is correct with AutoCAD
public object GetClassFromEntityXData()
{
    Database db = Application.DocumentManager.MdiActiveDocument.Database;
    Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
    object objectToRestore;

    MyUtil util = new MyUtil();

    PromptEntityResult per = ed.GetEntity("Select entity to get class from:\n");

    if (per.Status != PromptStatus.OK)
        return;

    // Get back the class
    using (Transaction tr = db.TransactionManager.StartTransaction())
    {
        Entity ent = (Entity)tr.GetObject(per.ObjectId, OpenMode.ForRead);
        //Cast to your IClearspan interface here, or use Reflection
        // to determine deserialized object's Type
        objectToRestore = util.NewFromEntity(ent);

        tr.Commit();
    }

    return objectToRestore;
}
于 2014-06-19T19:41:13.593 に答える