C#ITypeInfo.GetContainingTypeLib在传递VBA类的活动实例时失败
因此,我尝试在VBA类实例上调用C#ITypeInfo.GetContainingTypeLib在传递VBA类的活动实例时失败,c#,excel,vba,com,typeinfo,C#,Excel,Vba,Com,Typeinfo,因此,我尝试在VBA类实例上调用ITypeInfo,虽然它看起来很有希望,但我想看看是否可以获得对其包含项目的引用,类似于类型库。我认为ITypeInfo.GetContainingTypeLib可能有用,但它抛出一个异常,表明VBA不合作。有人对VBA如何做与标准COM规范不同的事情有什么想法吗 C#类库代码在这里。注册COM互操作,并在AssemblyInfo.cs中设置COMVisible(true),使其可从VBA访问。下面给出了VBA客户端代码 using System; using
ITypeInfo
,虽然它看起来很有希望,但我想看看是否可以获得对其包含项目的引用,类似于类型库。我认为ITypeInfo.GetContainingTypeLib
可能有用,但它抛出一个异常,表明VBA不合作。有人对VBA如何做与标准COM规范不同的事情有什么想法吗
C#类库代码在这里。注册COM互操作,并在AssemblyInfo.cs中设置COMVisible(true)
,使其可从VBA访问。下面给出了VBA客户端代码
using System;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.ComTypes;
namespace TypeLibraryInspector
{
[ComImport()]
[Guid("00020400-0000-0000-C000-000000000046")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IDispatch
{
[PreserveSig]
int GetTypeInfoCount(out int Count);
[PreserveSig]
int GetTypeInfo
(
[MarshalAs(UnmanagedType.U4)] int iTInfo,
[MarshalAs(UnmanagedType.U4)] int lcid,
out System.Runtime.InteropServices.ComTypes.ITypeInfo typeInfo
);
//void GetTypeInfo(int typeInfoIndex, int lcid, [MarshalAs(UnmanagedType.CustomMarshaler,
// MarshalTypeRef = typeof(System.Runtime.InteropServices.CustomMarshalers.TypeToTypeInfoMarshaler))] out Type typeInfo);
//void GetTypeInfo(int typeInfoIndex, int lcid, out IntPtr piTypeInfo);
[PreserveSig]
int GetIDsOfNames
(
ref Guid riid,
[MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.LPWStr)]
string[] rgsNames,
int cNames,
int lcid,
[MarshalAs(UnmanagedType.LPArray)] int[] rgDispId
);
[PreserveSig]
int Invoke
(
int dispIdMember,
ref Guid riid,
uint lcid,
ushort wFlags,
ref System.Runtime.InteropServices.ComTypes.DISPPARAMS pDispParams,
out object pVarResult,
ref System.Runtime.InteropServices.ComTypes.EXCEPINFO pExcepInfo,
IntPtr[] pArgErr
);
}
public interface IInspector
{
void InspectThisObject(object vbaClassInstance);
}
[ClassInterface(ClassInterfaceType.None)]
[ComDefaultInterface(typeof(IInspector))]
public class Inspector : IInspector
{
private const int S_OK = 0; //From WinError.h
private const int LOCALE_SYSTEM_DEFAULT = 2 << 10; //From WinNT.h == 2048 == 0x800
void IInspector.InspectThisObject(object vbaClassInstance)
{
//https://limbioliong.wordpress.com/2011/10/18/obtain-type-information-of-idispatch-based-com-objects-from-managed-code/
IDispatch pDispatch = (IDispatch)vbaClassInstance;
ITypeInfo piTypeInfo;
pDispatch.GetTypeInfo(0, LOCALE_SYSTEM_DEFAULT, out piTypeInfo);
string s1; string s2; string s3;
int i1;
piTypeInfo.GetDocumentation(-1, out s1, out s2, out i1, out s3);
//s1 = "Class1" good
//s2 = null shame
ITypeLib piTypeLib;
int pIndex;
piTypeInfo.GetContainingTypeLib(out piTypeLib, out pIndex); // <-- throws Exception 0x800A88C1
}
}
}
在Class1可以是任何类的情况下,我有两个空函数,但我认为这并不相关
我已经问过了。如果dll是com公开的,则必须向regsvr32注册
此外,您可能需要对.net程序集进行GAC处理,因为这些程序集是内部管理的,所以答案可能会非常多。你可以看看一般的方法。
Sub Test()
Dim oInspector As TypeLibraryInspector.Inspector
Set oInspector = New TypeLibraryInspector.Inspector
Dim oClass1 As Class1
Set oClass1 = New Class1
oInspector.InspectThisObject oClass1
End Sub