Create a Unique Project ID and automated folder structure under document library using Event Receiver in SharePoint 2013/2016/2019

This SharePoint tutorial explains, how to create unique ID and folder structure automatically using Event receiver in SharePoint 2013/2016/2019.

Create a Unique Project ID and automated folder structure under document library using Event Receiver in SharePoint

Below are the steps to create an event receiver in Visual Studio 2017/2019. Before we start, we have to create two things here.

1: Create a Project master List

2: Create a Deliverable Library

Step 1: Open Visual Studio – > Go to solution explorer -> Create a New Items -> Choose Event Receiver -> Click on Add button

Step 2: Next page will appear to choose Event Receiver Settings . So here you can select List Item Events and custom list in the event source. Next you can choose An item was added as per below screenshot.

Step 3: Next you can follow the below code to use in your visual studio snip to achieve your goal.

using System;
using System.Security.Permissions;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.Workflow;

namespace SharePoint_Webparts.Create_Folder
{
    /// <summary>
    /// List Item Events
    /// </summary>
    public class Create_Folder : SPItemEventReceiver
    {
        /// <summary>
        /// An item was added.
        /// </summary>
        public override void ItemAdded(SPItemEventProperties properties)
        {
            base.ItemAdded(properties);
            string Siteurl = properties.ListItem.Web.Url;
            using (SPSite site = new SPSite(Siteurl))
            {
                using (SPWeb web = site.OpenWeb())
                {
                    web.AllowUnsafeUpdates = true;
                    SPListItem currentItem = properties.ListItem;
                    currentItem["Project_ID"] = "KM-ID00" + Convert.ToInt32(properties.ListItem["ID"]).ToString();
                    currentItem.Update();
                    SPList spl = web.Lists["Deliverable Library"];
                    var FolderAdded = spl.Items.Add("", SPFileSystemObjectType.Folder, "KM-ID00" + Convert.ToInt32(properties.ListItem["ID"]).ToString());
                    FolderAdded.Update();
                    string[] namesArray = new string[] { "Analysis", "Design", "Development", "Testing", "Deployment" };
                    foreach (string name in namesArray)
                    {
                        SPListItem SubFolder = spl.AddItem(FolderAdded.Folder.ServerRelativeUrl, SPFileSystemObjectType.Folder, name);
                        SubFolder.Update();
                    }
                    web.AllowUnsafeUpdates = false;
                }
            }
        }
    }
}

Step 4: in Element.xml – you need to modify the Receivers List URl instead of List template ID . You have to update your list URL here.

<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <Receivers ListUrl="/sites/KMIntranet/Lists/Project%20Master">
      <Receiver>
        <Name>Create_FolderItemAdded</Name>
        <Type>ItemAdded</Type>
        <Assembly>$SharePoint.Project.AssemblyFullName$</Assembly>
        <Class>SharePoint_Webparts.Create_Folder.Create_Folder</Class>
        <SequenceNumber>10000</SequenceNumber>
      </Receiver>
  </Receivers>
</Elements>

Step 5: Once your code get ready, right click on solution explorer and Deploy the solution.

Step 6: Next go back to your list and add an Item in the list and see what happen. Here Project_ID will generate automatically after you save your data. Please look into the below screenshot which is shown in the Project _ID column.

Step 7: Same time if you will open your document library, the folder is created as same name.

Step 8: If you open the folder, all folder structure has created automatically here. Please look into the screenshot.

You may like following event receiver tutorials:

• Remote Event Receivers in SharePoint online + Develop in Provider hosted Add-in using Visual Studio 2015 and Deploy to Microsoft Azure
• Difference between workflows and event receivers in SharePoint 2013
• SharePoint 2016/2013 event receiver example using Visual Studio 2017
• SharePoint Development Training
• Create remote event receiver SharePoint Online Step by Step Tutorial
• BeforeProperties and AfterProperties in Event Receiver in SharePoint 2013
• Working with date column in the list in SharePoint 2010 Event Receiver
• Create an event handler to prevent items from deleting the item from SharePoint list using Visual Studio 2010
• How to use the WebProvisioned event in SharePoint 2010?
• Different ways to create auto increment column in SharePoint 2013/2016/Online list

This is all about creating folder structure automatically using SharePoint Event receiver.