Hi

I have loaded a file with the "LoadFromFile" method. The file was created using the "SaveToFile" method.
After loading the file I obtain a collection of boxes using the "GetBoxes"() method. I iterate over these boxes using the "GetCount" and "GetItem" methods. For certain conditions I wish to delete a box. I then use the "DeleteItem" method with a parameter obtained from the "GetItem" method. This gives me an error:
Unhandled exception... Access violation reading location...

Any ideas why this happens? I have used the "DeleteItem" method before without any problems. Is the problem related to loading the file or obtaining objects with the "GetItem" method?


Best regards,
Magnus

Hi Stoyan

Yes, the exception is thrown by DeleteObject. I suspected the GetItem method at first but it turned out that this is ok.
My code (for test purposes) looks something like this:

m_FlowChart.LoadFromFile(_T("test.sld"));
nodes=m_FlowChart.GetBoxes();
for(int i=0;i<nodes.GetCount();i++)
bi=nodes.GetItem(i);
m_FlowChart.DeleteItem(bi);

The exception is thrown on the first "round" in the loop.
After the GetItem method I use debugtools to check "bi" and all data seems correct.


Best regards,
Magnus

Hi Stoyan

I found the problem. Seems I am the one to blame since I did not see problem all the way through.
I have a lot of code in the "BoxDeleted" event which I did not handle correctly.
I am very sorry for taking your time with this and I hope you have not spent to much time on it.


Best regards,
Magnus