WIA viewfinder in c#

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i'm trying to write a program in c# for tethering a canon s3is digital camera.

When i connect the camera it seems to go into a kind of sleep mode or connection mode, the lens is retracted and no image in the viewfinder but i can see the camera in explorer.

I'm able to make it take pictures using WIA , the camera turns on , take a picture and goes back to 'sleep mode' so i guess that would mean it's wia compatible.

Now i need to have the live viewfinder work in the program but i can't seem to find any info on how to do that.

i tried using CreateVideoByWiaDevID from IWIAVideo but it gives an exception HRESULT: 0x80210015. Apparently it means the device is not compatible or abscent which is weird cause i can take pictures with it...

I do have access to the canon SDK but i do programming for a hobby and i'm not familiar with C (the sdk language uses), pointers , headers , callback and all the other things that seems to be necessary to use the SDK

any help will be apreciated

Posted 9-Feb-12 9:23am

Louis-Etienne Chicoine

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Christian Graus · Accepted Answer · 2012-02-09T09:48:00

Solution 1

I wrote a C# wrapper for the Canon SDK, it's an article here on Code Project. Just search for Canon. It's probably quite a bit out of date, but it could be the way forward if you wanted to update it, or just see if it works. That's assuming it's the same SDK.

When I tried using WIA instead of that SDK, all I could do was take pictures, no viewfinder, etc. The SDK let me set all camera settings, zoom, preview, etc.

Posted 9-Feb-12 9:48am

Christian Graus

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Louis-Etienne Chicoine 9-Feb-12 16:27pm

Yeah i think i saw that in my research but i haven'tried it yet. I have the documentation for the SDK but it's seems rather complex to make it work even once wrapped.

I'm still a newb in terms of programming and it's mostly Object oriented. If i need to display a video i put a component on my form that does this , so the whole SDK is a bit overwhelming to comprehend for me.

I found the function that i would need to call but then the explanation goes on about various buffers and callback function that i seem to have to define which one i want ? and saying that the image should display somewhere in that callback function....

all stuff i'm pretty much not familiar with at the moment...

Louis-Etienne Chicoine 9-Feb-12 16:29pm

My bad , it wasn't your wrapper that i saw. i'll give it a try

Louis-Etienne Chicoine 9-Feb-12 16:42pm

Thank you , the sample should allow me to understand what i need to make this work

Christian Graus 9-Feb-12 17:06pm

I hope so, although it's a few years old, as I said