序列化代码导致未处理的异常
Mat*_* VS 5 c# serialization autocad unhandled-exception autocad-plugin
我正在尝试创建一些代码,可以将类库序列化和反序列化为AutoCAD绘图.这个问题与AutoCAD没什么关系,除了它是我无法通过正常方式调试它的原因.我从这篇文章开始这个项目并成功运行了他的代码.然而,他的代码的结构方式,需要我让我的所有类继承自他的基础对象.因为这显然是代码味道,我知道我需要创建一个界面.下面是我最终得到的代码.
第一部分是负责序列化到AutoCAD绘图中的代码.
第二部分是实现我的自定义序列化接口的类的示例
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();
}
}
}
这是我试图测试的虚拟类:
[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;
}
}
这是界面:
public interface IClearspanSerializable
{
void GetObjectData(SerializationInfo info, StreamingContext context);
void SetObjectData(object objectInDisguise);
}
当我尝试在AutoCAD中运行代码时,我得到的就是这个错误.这让我相信我的类初始化中存在一个简单的错误.我的断点没有被击中.
我该怎么调试呢？我在哪里搞砸了我的初始化？
[编辑] - 这是"详细信息"中的内容:
******************************************************************************
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()
************** Loaded Assemblies **************
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CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
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Acdbmgd
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adui20
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System
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PresentationFramework.Classic
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System.Drawing
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL
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accoremgd
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System.Core
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AcLayer.resources
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AcAeNet.resources
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AcMrUi.resources
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AcViewTransitionsUi.resources
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AdskConnectionPointMgd.resources
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AcCalcUi.resources
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AcLivePreviewContext
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----------------------------------------
AcDialogToolTips
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AcDialogToolTips.resources
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Write To Block
Assembly Version: 1.0.5276.26438
Win32 Version: 1.0.0.0
CodeBase: file:///C:/Users/Administrator/Documents/Clearspan/AutoCAD%20Projects/Write%20To%20Block/Write%20To%20Block/bin/Debug/Write%20To%20Block.dll
----------------------------------------
************** JIT Debugging **************
Application does not support Windows Forms just-in-time (JIT)
debugging. Contact the application author for more
information.
System.ArgumentException：无法绑定到目标方法，因为其签名或安全透明度与委托类型的签名或安全透明度不兼容。
我的理解是，您的接口的“GetObjectData”方法与 BinnaryFormatter 厨房中某处的 ISerialized 方法冲突。
只需重构 MyUtil 中的所有转换函数（StreamToResBuf、ResBufToStream ...），您就应该能够序列化/反序列化任何标有 [Serialized] 属性的类。
你的虚拟类应该是这样的（集合和基元类型是自动序列化的，仅在需要时实现 ISerialized）：
[Serializable]
public class MattMember
{
public string Name;
List<int> MattsInts;
}
NewFromEntity 方法（此处避免任何不必要的转换）：
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);
}
}
最后是你的命令：
[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;
}
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