Clone annotation object

I have "LTANNLib.LEADRasterAnnotationClass annObj" Is there anyway I can clone this object?

I'm using version 14.5, annotation COM object with dotNet classes.

Please advice,

This object doesn't have a clone method.  However, you can use the
AnnCopy method to copy the annotations to the clipboard, create a new
annotation object then use AnnPaste to paste the annotations to the new object.  Will this solve your problem?

Actually, it's my work around bug access violation error. The case is after I've create freehand object and select it right away then it's throw exception "System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. " and then crash my program.

I have my code save annotation to file then load it back then select annotation object, now it's fine. But I thought my work around is work but kind of lame and I just want to know if there is any way to clone everything from my current annObj object somewhere so I can clear current annObj and then clone it back.

Anything?

As far as cloning LEADRasterAnnotationClass
object, creating a new one and copying the old one to it is the best way to go.  It is more efficient that saving and loading from disk.

If you want, I can try to investigate the access violation error, but I will need a "small" working project that shows it.

Did the method I described in the post above work for you?

The new RasterAnn needs to be attached to a RasterViewer control by the
AnnParentRasterView property.  Also, there should be a bitmap
loaded in this RasterViewer.  If this approach is not suitable for
you, then there is another way to do this.  You can use
AnnSaveMemory or AnnSaveArray to save the annotations of the source
RasterAnn into a memory buffer, then use AnnLoadMemory or AnnLoadArray to load it into the new RasterAnn.

1. Could you provide me sample code to use AnnSaveMemory & AnnSaveArray for annotation COM object in C# please?
2. Is there any difference in performance between these two?

Here is what I've tried:
1. I've created TheAnn3. Can I attach to exisitng AxLEADRasterView1 following this?
    TheAnn3.AnnParentRasterView = AxLEADRasterView1.GetOcx();
2. Or do I must create AxLEADRasterView3 for it?

3. I have code save to memory following this:
int hMemGlobal = 0;
int iSizeGlobal = 0;
short error = TheAnn1.AnnSaveMemory(ref hMemGlobal,
    LTANNLib.AnnFMTConstants.ANN_FMT_NATIVE, false/*save all*/,
    ref iSizeGlobal, LTRASTERIOLib.SaveModifyConstants.SAVE_OVERWRITE, 0);

Then I have new ann object load from memory:
error = TheAnn3.AnnLoadMemory(hMemGlobal, iSizeGlobal, 1);

I have code enumerate ann obj from TheAnn3 and got nothing.

Is there something wrong with my code?

Please advice,

Your code looks correct.  Does AxLEADRasterView1.Raster
have a valid bitmap in it?  If not, then this is probably the
cause.  Call CreateBitmap to create a blank bitmap to hold the annotations.

My original code already attach TheAnn1 to AxLEADRasterView1 following this:
TheAnn1.AnnParentRasterView = AxLEADRasterView1.GetOcx();

When I attached TheAnn3 to AxLEADRasterView1 again, would it causing this?
I really don't want to create AxLEADRasterView3, it's lot of code change on my side.

Yes, I already have bitmap loaded in AxLEADRasterView1.
The situation is I can't enumerate ann object from TheAnn3 but when I save both TheAnn1 & TheAnn3 to ann file and compare, it's identical. Why is that?

I just want to compare ann object of both TheAnn1 & TheAnn3 - make sure that it's correct.

Please help,

If you have both annotation objects attached to the same AxLEADRasterView,
then try attaching them to two different ones.  I tried over here,
and it doesn't seem to work properly if you attach them both to the same AxLEADRasterView.

Could you give me your code? I've tried attach AxLEADRasterView3 and I've saved it to file and there was nothing in a file - just a blank file.

This is the project I have been testing with.  It's in VB, but the same applies in C#.

I've got it. Thanks.