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

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
• 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.