How to create custom Document ID provider in SharePoint 2010

In this article we will be seeing how to create custom Document ID provider in SharePoint 2010.

Here we are going to see how to create a custom Document ID provider in the format "Site Name - List Name - List item ID".

Refer This two articles(first and second) for Document ID Service feature in SharePoint 2010.

Steps Involved:

Open Visual Studio 2010.
Go to File => New => Project.
Select Empty SharePoint Project template from the installed templates.
Enter the Name and click Ok.
Right click on the solution and click on Add a new item.
Select the Class template from the installed template.
Enter the Name as CustomIDProvider.cs and click Ok.
Add the following references.
- Microsoft.SharePoint.dll
- Microsoft.Office.DocumentManagement.dll
Add the following namespaces.
- Using Microsoft.SharePoint;
- Using Microsoft.Office.DocumentManagement;
Replace the CustomIDProvider.cs with the following code.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.Office.DocumentManagement;
namespace DocumentIDProvider
{
public classCustomIDProvider : Microsoft.Office.DocumentManagement.DocumentIdProvider
{
private string idFormat = "{0} - {1}- {2}";
public overridestring[] GetDocumentUrlsById(SPSite site,string documentId)
{
string itemUrl =string.Empty;
// Only proceed if we have the site and document id
if (site !=null && !string.IsNullOrEmpty(documentId))
{
string[] splits = documentId.Split('@',' ');
string webName = splits.Length > 0 ? splits[0] : null;
string itemId = splits.Length > 1 ? splits[1] : null;
try
{
SPWeb web = string.IsNullOrEmpty(webName) ? site.OpenWeb() : site.OpenWeb(webName);
SPListItem item = null;
Guid itemGuid =new Guid(itemId);
// Find the item among the lists on the specified web
foreach (SPList list in web.Lists)
{
try
{
item = list.Items[itemGuid];
}
catch
{
//if it's not in this list, go to the next one
continue;
}
if (item != null)
{
itemUrl = web.Url + "/";
itemUrl += item.Url;
}
}
}
catch (Exception) { /* item not found, return an empty array*/ }
}
if (string.IsNullOrEmpty(itemUrl))
{
returnnull;
}
else
{
returnnew string[] { itemUrl };
}
}
public overridestring GenerateDocumentId(SPListItem listItem)
{
if (listItem ==null)
{
thrownew ArgumentNullException("listItem");
}
return string.Format(this.idFormat, listItem.Web.Title, listItem.ParentList.Title, listItem.ID.ToString());
}
public overridestring GetSampleDocumentIdText(SPSite site)
{
return string.Format(this.idFormat,"/", "0");
}
public overridebool DoCustomSearchBeforeDefaultSearch
{
get { return false; }
}
}
}
Right Click on the Feature and click on Add Feature.
Rename the feature as CustomIDProviderReciever.
Right click on CustomIDProviderReciever and click on Add Event Receiver.
Now the entire solution looks like following.
Replace CustomIDProviderReciever.EventReceiver.cs with the following code.

using System;
using System.Runtime.InteropServices;
using System.Security.Permissions;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Security;
using Microsoft.Office.DocumentManagement;
namespace DocumentIDProvider.Features.CustomIDProviderReciever
{
[Guid("e806be7b-a8e1-40a9-ab9a-037e2eb522c9")]
public classCustomIDProviderRecieverEventReceiver : SPFeatureReceiver
{
public override void FeatureActivated(SPFeatureReceiverProperties properties)
{
DocumentId.SetProvider(properties.Feature.Parentas SPSite, new CustomIDProvider());
}
public overridevoid FeatureDeactivating(SPFeatureReceiverProperties properties)
{
DocumentId.SetDefaultProvider(properties.Feature.Parentas SPSite);
}
}
}
Build and deploy the solution.
Go to the site where you have deployed the solution.
Go to Site Actions => Site Collection Administration => Document ID settings.
Add a document and check the document ID.