Get Document ID based on specific folder in SharePoint 2013 document library

Question

Hi,
I have created document library with multiple folders in SharePoint 2013.I have created workflow to assign file name convention like this "attachment name-ID".When i created document in one folder the ID is 1 and when I created document in another
folder, the Id is 2.
But my requirement is to create Id based on the folder means if document is not there in the folder then the document id should start from 1 and Id should ends within that folder and in another folder it should start from 1 again
Any help?
Thank you.

Answer 1

In this case you will have to build a custom document id provider, see here:
http://www.sharepointeurope.com/blog/2013/11/21/how-to-create-a-custom-document-id-provider-with-sharepoint-2013
Here's code taken from that post that shows the minimal implementation of such a provider:
using System.IO;
using Microsoft.Office.DocumentManagement;
using Microsoft.SharePoint;
namespace CustomDocumentIDProvider.Components
class CustomDocumentIDProvider : DocumentIdProvider
public override string GenerateDocumentId(SPListItem listItem)
string retParam = "SPDocID-";
string path = Path.GetRandomFileName();
path = path.Replace(".", "");
retParam += path.Substring(0, 8).ToUpper();
return retParam;
public override string GetSampleDocumentIdText(SPSite site)
return "SPDocID-HT7G4SP7";
Kind regards,
Margriet Bruggeman
Lois & Clark IT Services
web site: http://www.loisandclark.eu
blog: http://www.sharepointdragons.com