using the imagecontrol SaveAs method in c++

Last post 07-30-2007 2:56 PM by support. 4 replies.

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05-11-2007 5:04 PM

silent
Joined on 05-11-2007
Posts 6

using the imagecontrol SaveAs method in c++

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Hi,

i'm having a problem in my c++ application using the axtiveX image control.

When i try to use the method Savas like this:

im1->SaveAs(strImageFile);

The code does compile but at runtime i'm getting this error:

A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in mscorlib.dll

at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)

at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)

at AxIMActX8.AxImageControl.SaveAs(String fileName)

at ScanOcr.ScanOcrControl.ScanImages(ValueType bIsPurchase, AxImTwain imtwain, AxImageControl im1, String g_strOcrTempPath) in d:\code\mfc_docking_winform_control_view_test\scanocr\scanocrcontrol.cpp:line 106

at IMActX8.IImageControl.SaveAs(String FileName, Object& SaveAttributes)

Im breaking my head and teeth on this one.

Someone any idea to solve this ?

I've searched for some more information and got the HRESULT from the operation:

0x800A81B3

05-14-2007 7:23 AM In reply to

Admin
Joined on 06-19-2006
Posts 217

Re: using the imagecontrol SaveAs method in c++

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Hi,

Have you tried passing an Attributes object as the 2nd parameter to the SaveAs call ? C# doesnt support calling methods without all the params so thats likely the problem. I would also suggest you look at our ImageMan.Net toolkit for use in managed .net code, its a much nicer interface and easier to call/use.

05-14-2007 8:44 AM In reply to

silent
Joined on 05-11-2007
Posts 6

Re: using the imagecontrol SaveAs method in c++

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Hi,

I've already tried with the two parameters:

im1->SaveAs(strImageFile, im1->ImageAttributes);

But I keep getting the same error.

In fact I've gotten this code in c# from another company and I'm sure it has worked, but

now at the moment I keep having the same error all the time on the same line.

In fact this is wath I'm doing with the component:

All the lines pass except the im1->saveas....

hDIB = imtwain->ScanPage(false);

while ((hDIB != 0) && (i < 1000))

{

im1->hDIB = hDIB;

im1->Refresh();

im1->Overwrite = IMActX8::enumOverwrite::Yes;

if (im1->ImageColors == 2)

{

im1->Compression = IMActX8::enumCompression::Group4;

} else

{

im1->Compression = IMActX8::enumCompression::LZW;

}

String^ strImageFile = g_strOcrTempPath + "\\" + System::Guid::NewGuid().ToString("N") + ".tiff";

try

{

im1->SaveAs(strImageFile, im1->ImageAttributes);

}

catch(COMException^ e)

{

Trace::WriteLine(e->StackTrace);

Trace::WriteLine(e->HelpLink);

Trace::WriteLine(e->Source);

Trace::WriteLine(e->Message);

Trace::WriteLine(e->ErrorCode);

}

sImageFiles->Add(strImageFile);

i+=1;

hDIB = imtwain->ScanPage(false);

}

07-30-2007 2:14 AM In reply to

silent
Joined on 05-11-2007
Posts 6

Re: using the imagecontrol SaveAs method in c++

Reply Contact

Hi,

I' ve solved the problem in the meanwhile,

in fact c++ seems to make axinterop wrapper classes when u add them to the toolbox

And if I use these dll's inside my project I get the error,

but whe I change the project to use the dll's that are with the suite the error doesn't appear.

07-30-2007 2:56 PM In reply to

support
Joined on 02-02-2001
Posts 1,372

Re: using the imagecontrol SaveAs method in c++

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Thanks for the update, sounds like the automatically generated wrappers had the method types incorrectly.

Sean
Data Techniques Online Support

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