Copying Document Across Site Collections to Dynamic Locations - Office 365 / SharePoint

Question

I have users uploading documents into a library in one site collection and adding a reference number to each file (text box - list item). Can I use that reference number to find a corresponding folder on a different site collection and programmatically
copy the file to that location? The reference number is part of the name of the folder. SharePoint Designer, Visual Studio, Napa - whichever is easiest. Using Office 365 / SharePoint Online.
Thanks!

Answer 1

Hi,
If the reference number plus with the file name is valid and unique, we will be able to find the wanted folder across site collections by querying this file and its parent folder.
As the reference number + file name is just a string value of a column of a library, we may need to iterate through all the libraries and check whether there is such a file with
CAML query statements.
http://msdn.microsoft.com/en-us/library/office/ms467521(v=office.15).aspx
http://msdn.microsoft.com/en-us/library/office/hh185007(v=office.14).aspx
As it is an Office 365 site, Client Object Model or REST API would be choices for accessing data of SharePoint Objects.
http://msdn.microsoft.com/en-us/library/office/fp179912(v=office.15).aspx
http://msdn.microsoft.com/en-us/library/office/fp142380(v=office.15).aspx
In SharePoint 2013, App is a more recommended way when developing custom solution.
Here are some samples about
creating SharePoint app for your reference:
http://msdn.microsoft.com/en-us/library/office/jj901637(v=office.15).aspx
http://www.c-sharpcorner.com/UploadFile/anavijai/how-to-get-all-the-items-from-the-list-in-sharepoint-2013-on/
Feel free to reply if there are still any questions.
Best regards
Patrick Liang
TechNet Community Support