"Ying-Shen Yu[MSFT]" <v-yiy@online.microsoft.com> wrote in message
news:k3Fg3UwgDHA.2076@cpmsftngxa06.phx.gbl...
> Hello Tyler,
> We already noticed that there is no good way to only specify a
> sizeconst for a native array parameter. We are trying to fix this in the
> next release. For now, as a work around, could you add a parameter for
> passing the size of the array in your delegate signature? If yes you may
> rewrite it like this
> protected delegate uint ReadProc(
>
> [MarshalAsUnmanagedType.LPArray,ArraySubType=UnmanagedType.U1,
> SizeParamIndex =1 )]
> byte [] fvData,
> int dataSize,
> UIntPtr pfvuiSize, Object fvContext);
> also, you need to change your unmanaged function signature accordingly,
and
> pass the size in dataSize param.
>
> SizeParamIndex above indicates that the size of the array will be given by
> the parameter at index 1 (with the array parameter at index 0 for a
> signature that is not marked with PreserveSig=true ­if the sig is marked
> with PreserveSig then the indexing is 1 based).
>
> If you still have problem , please let me know.
> Thanks!
>
>
>
> Best regards,
>
> Ying-Shen Yu [MSFT]
> Microsoft Online Partner Support
> Get Secure! - www.microsoft.com/security
>
> This posting is provided "AS IS" with no warranties and confers no rights.
> You should not reply this mail directly, "Online" should be removed before
> sending, Thanks!
>
> --------------------
> | X-Tomcat-ID: 330961814
> | References: <usvzMxdgDHA.1764@TK2MSFTNGP09.phx.gbl>
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> | From: v-yiy@online.microsoft.com (Ying-Shen Yu[MSFT])
> | Organization: Microsoft
> | Date: Wed, 24 Sep 2003 10:23:01 GMT
> | Subject: RE: MarshalDirectiveException - Array size control parameter
> must be an integral type
> | X-Tomcat-NG: microsoft.public.dotnet.framework.interop
> | Message-ID: <#CedRXogDHA.2624@cpmsftngxa06.phx.gbl>
> | Newsgroups: microsoft.public.dotnet.framework.interop
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microsoft.public.dotnet.framework.interop:19022
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> |
> | Hi Tyler,
> | I can reproduce your problem, but haven't got a work around. I'm
> | doing some research on it and will give you some update soon, thanks!
> |
> | Best regards,
> |
> | Ying-Shen Yu [MSFT]
> | Microsoft Online Partner Support
> | Get Secure! - www.microsoft.com/security
> |
> | This posting is provided "AS IS" with no warranties and confers no
rights.
> | You should not reply this mail directly, "Online" should be removed
> before
> | sending, Thanks!
> |
> | --------------------
> | | From: "Tyler" <Tyler@work.com>
> | | Subject: MarshalDirectiveException - Array size control parameter must
> be
> | an integral type
> | | Date: Tue, 23 Sep 2003 10:09:22 -0400
> | | Lines: 40
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> microsoft.public.dotnet.framework.interop:18985
> | | X-Tomcat-NG: microsoft.public.dotnet.framework.interop
> | |
> | | I get the following exception when my unmanaged code attempts to
invoke
> | the
> | | delegate that follows:
> | |
> | | Delegate Declaration:
> | |
> | | protected delegate uint
> | | ReadProc(
> | | [MarshalAsUnmanagedType.LPArray,
> | | ArraySubType=UnmanagedType.U1, SizeConst=12)] byte [] fvData,
> | | UIntPtr pfvuiSize,
> | | Object fvContext);
> | |
> | | Exception:
> | | An unhandled exception of type
> | | 'System.Runtime.InteropServices.MarshalDirectiveException' occurred in
> | | system.windows.forms.dll
> | | Additional information: Array size control parameter must be an
> | integral
> | | type.
> | |
> | |
> | | I don't understand why the exception is occurring as I have specified
an
> | | integral SizeConst.
> | |
> | | Background to the problem is as follows:
> | | - allocate array in C# and pass it to P/Invoke worker function along
> with
> | a
> | | delegate
> | | - worker invokes delegate to populate the array and specify # of bytes
> | | copied into the array
> | | - object is just a parameter passed to the worker function that the
> worker
> | | passes to the delegate (not important)
> | | - I know how big the array is, because I allocated it - however, I've
> | found
> | | that I need to specify that size when marshalling, otherwise it will
> think
> | | the array is only 1 byte long in the method passed as the delegate
> | | - when I specify the size, however, I get the exception noted above
> | |
> | | I would greatly appreciate any insight into this issue.
> | |
> | | Thanks, Tyler
> | |
> | |
> | |
> |
> |
>