在ATL / COM之间传递结构的SAFEARRAY - C＃ [英] Passing SAFEARRAY of Structure between ATL/COM - C#

问题描述

我试图从C＃ - ATL / COM传递结构的SAFEARRAY。我没有成功。可以告诉我，我在代码中缺少什么？或者它不可能？

I tried to pass SAFEARRAY of structures from C# - ATL/COM. I didn't have a success. Can anybody tell me, what am I missing in the code? or it is not possible?

// testATLCOMSvr.idl : IDL source for testATLCOMSvr//// This file will be processed by the MIDL tool to// produce the type library (testATLCOMSvr.tlb) and marshalling code.import "oaidl.idl";import "ocidl.idl";[	object,	uuid(),	oleautomation,	nonextensible,	pointer_default(unique)]interface IATLTest : IUnknown{			typedef    [        uuid(),         version(1.0),        helpstring("safe arrary")    ]	struct MG_ACQU_CHANNEL_T	{		BSTR strChannelName; //ecm channels class props	}MG_ACQU_CHANNEL_T;		[id(1), helpstring("get atl string"), helpcontext(1)] HRESULT GetATLString2([in] BSTR myString, [out,retval] BSTR* retVal);	[id(2), helpstring("safearray"), helpcontext(2)] HRESULT GetSafeArrayOfParam([in] SAFEARRAY(MG_ACQU_CHANNEL_T) ChannelList, [out,retval] BSTR* retVal);};[	uuid(),	version(1.0),]library testATLCOMSvrLib{	importlib("stdole2.tlb");	[		uuid()			]	coclass ATLTest	{		[default] interface IATLTest;	};};ATLTest.h// ATLTest.h : Declaration of the CATLTest#pragma once#include "resource.h"       // main symbols#include "testATLCOMSvr_i.h"#if defined(_WIN32_WCE) && !defined(_CE_DCOM) && !defined(_CE_ALLOW_SINGLE_THREADED_OBJECTS_IN_MTA)#error "Single-threaded COM objects are not properly supported on Windows CE platform, such as the Windows Mobile platforms that do not include full DCOM support. Define _CE_ALLOW_SINGLE_THREADED_OBJECTS_IN_MTA to force ATL to support creating single-thread COM object's and allow use of it's single-threaded COM object implementations. The threading model in your rgs file was set to 'Free' as that is the only threading model supported in non DCOM Windows CE platforms."#endifusing namespace ATL;// CATLTestclass ATL_NO_VTABLE CATLTest :	public CComObjectRootEx<CComSingleThreadModel>,	public CComCoClass<CATLTest, &CLSID_ATLTest>,	public IATLTest{public:	CATLTest()	{	}DECLARE_REGISTRY_RESOURCEID(IDR_ATLTEST)DECLARE_NOT_AGGREGATABLE(CATLTest)BEGIN_COM_MAP(CATLTest)	COM_INTERFACE_ENTRY(IATLTest)END_COM_MAP()	DECLARE_PROTECT_FINAL_CONSTRUCT()	HRESULT FinalConstruct()	{		return S_OK;	}	void FinalRelease()	{	}public:		STDMETHOD(GetATLString2)(BSTR myString, BSTR* retVal);	STDMETHOD(GetSafeArrayOfParam)(SAFEARRAY * ChannelList, BSTR* retVal);};OBJECT_ENTRY_AUTO(__uuidof(ATLTest), CATLTest)ATLTest.cpp// ATLTest.cpp : Implementation of CATLTest#include "stdafx.h"#include "ATLTest.h"// CATLTestSTDMETHODIMP CATLTest::GetATLString2(BSTR myString, BSTR* retVal){	// TODO: Add your implementation code here	return S_OK;}STDMETHODIMP CATLTest::GetSafeArrayOfParam(SAFEARRAY * ChannelList, BSTR* retVal){	// TODO: Add your implementation code here		return S_OK;}C#  - ATLClientArray arr = Array.CreateInstance(typeof(MG_ACQU_CHANNEL_T), 2);                                    for (int i = 0; i < 2; i++)            {                MG_ACQU_CHANNEL_T channel = new MG_ACQU_CHANNEL_T();                channel.strChannelName = "welcome " + i;                arr.SetValue(channel, i);            }                        IATLTest atlTest = new ATLTest();            try            {                string str = "test string";                                atlTest.GetATLString2(str);                atlTest.GetSafeArrayOfParam(arr);            }            catch (ArgumentException ae)            {                            }When I right click on function "GetSafeArrayOfParam " and go to function definition in c#. I see below function definition.using System;using System.Runtime.InteropServices;namespace testATLCOMSvrLib{    [TypeLibType(384)]    [Guid()]    [InterfaceType(1)]    public interface IATLTest    {        string GetATLString2(string myString);        string GetSafeArrayOfParam(Array ChannelList); //structure showed as array in C#    }}

当我运行代码时，我得到一个异常：

When I run the code, I get an exception:

异常：

发现了System.ArgumentException

 消息=参数不正确。 （HRESULT异常：0x80070057（E_INVALIDARG））

 来源= mscorlib

  StackTrace：

      在System.StubHelpers.MngdSafeArrayMarshaler.ConvertSpaceToNative（IntPtr pMarshalState，Object& pManagedHome，IntPtr pNativeHome）

       at testATLCOMSvrLib.IATLTest.GetSafeArrayOfParam（Array ChannelList）

      在ATLClient的文件中，ATLClient的一个ATLClient.Form1.Form1_Load（Object sender，EventArgs e）：第51行。
  InnerException：

Exception:
System.ArgumentException was caught
  Message=The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG))
  Source=mscorlib
  StackTrace:
       at System.StubHelpers.MngdSafeArrayMarshaler.ConvertSpaceToNative(IntPtr pMarshalState, Object& pManagedHome, IntPtr pNativeHome)
       at testATLCOMSvrLib.IATLTest.GetSafeArrayOfParam(Array ChannelList)
       at ATLClient.Form1.Form1_Load(Object sender, EventArgs e) in ATLClient\Form1.cs:line 51
  InnerException:

提前致谢。

推荐答案

GSReddy ，

我正在尝试让一些高级工程师参与这个问题，这需要一些时间。非常感谢您的耐心等待。感谢您的理解。

I'm trying to involve some senior engineers into this issue and it will take some time. Your patience will be greatly appreciated. Thanks for your understnading.

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