类似的问题在这里发布了很多次,但我不知道为什么我会得到这个 COM 异常。
我有一个 IDL 文件,例如:
typedef [uuid(A6F30630-53F5-4688-829A-C084BA1C7DC0)]
enum EMaskActions
{
....
}EMaskActions;
typedef [uuid(A6F30632-53F5-4688-829A-C084BA1C7DC0)]
enum EMaskCallType
{
....
}EMaskCallType;
typedef [uuid(A6F30640-53F5-4688-829A-C084BA1C7DC0)]
struct TAction
{
EMaskActions Action;
BSTR Message;
long ExData;
}TAction;
typedef [uuid(A6F30641-53F5-4688-829A-C084BA1C7DC0)]
struct TMask
{
EMaskCallType CallType;
BSTR MaskString;
TAction Action;
}TMask;
[
object,
uuid(A6F30650-53F5-4688-829A-C084BA1C7DC0),
oleautomation,
nonextensible,
helpstring("DecoToniConfig Interface"),
pointer_default(unique)
]
interface IDecoToniConfig : IUnknown
{
....
[propget, id(6), helpstring("Returns the masks")]
HRESULT Masks([out, retval] SAFEARRAY(TMask)* masks);
[propput, id(6), helpstring("Sets the masks")]
HRESULT Masks([in, out] SAFEARRAY(TMask)* masks);
};
现在, TMask 结构包含一个 TAction 字段。
我用 tlbimp(不带 /sysarray arg)创建了一个互操作组件,IDecoToniConfig.set_Masks() 的签名是:
public virtual void set_masks(ref DecoToniCfgLib.TMask[] value)
但是当我从 c# 端调用它时,使用:
TMask[] masks = new TMask[1];
masks[0].CallType = EMaskCallType.MSKD_ACK;
masks[0].MaskString = "12DDD#34MMM";
masks[0].Action = new DecoToniCfgLib.TAction();
_DecotoniConfig.set_masks(ref masks);
我得到:
System.ArgumentException
"One or more arguments are not valid. (HRESULT: 0x80070057 (E_INVALIDARG))"
为什么?