SPFolder | Tjen Sharepoint Blog

Lately I got requirement to prevent users to create folder in SharePoint Document Library and List throughout site collection.
Then I did quick search in codeplex and found someone already did it

From there, I’ve added / updated items in the solution. Below is the list of steps that I’ve done:

1. Create New SharePoint Empty project, called it “CustomDisableFolder” and deploy it as farm solution.

2. Add New Item > Empty Element > called it “RemoveNewFolderRibbon”. Then populate Elements.xml to:

<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <CustomAction Id="CustomIdentifier.Ribbon.Documents.New.NewFolder.Hide" Location="CommandUI.Ribbon" RegistrationType="ContentType" RegistrationId="0x">
    <CommandUIExtension>
      <CommandUIDefinitions>
        <CommandUIDefinition Location="Ribbon.Documents.New.NewFolder">
        </CommandUIDefinition>
      </CommandUIDefinitions>
    </CommandUIExtension>
  </CustomAction>
  <CustomAction Id="Remove.ListItem.NewFolder" Location="CommandUI.Ribbon">
    <CommandUIExtension>
      <CommandUIDefinitions>
        <CommandUIDefinition
          Location="Ribbon.ListItem.New.NewFolder" />
      </CommandUIDefinitions>
    </CommandUIExtension>
  </CustomAction>
</Elements>

3. Add New Item > User Control > called it “AdditionalPageHeadUserControl.ascx”. Populate the ascx file with:

<%@ Assembly Name="$SharePoint.Project.AssemblyFullName$" %>
<%@ Assembly Name="Microsoft.Web.CommandUI, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>
<%@ Import Namespace="Microsoft.SharePoint" %>
<%@ Register Tagprefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="AdditionalPageHeadUserControl.ascx.cs" Inherits="CustomWeltmanDisableFolder.ControlTemplates.CustomWeltmanDisableFolder.AdditionalPageHeadUserControl" %>
<script type="text/javascript">
    //If there is NO JQuery loaded previously
    //window.onload = function () {
    //    var allinputs = document.getElementsByTagName("input");
    //    for (var i = 0; i < allinputs.length; i++) {
    //        if (allinputs[i].getAttribute('value') != null && (allinputs[i].getAttribute('value') == "RadEnableFoldersYes" || allinputs[i].getAttribute('value') == "RadEnableFoldersNo")) {
    //            allinputs[i].setAttribute("disabled", true);
    //        }
    //    }
    //};
 
    // Assume JQuery loaded in master page
    $(function () {
        // Disable New Folder checkbox settings in List / Library Settings
        $("input[id*='RadEnableFoldersYes']").attr("disabled", true);
        $("input[id*='RadEnableFoldersNo']").attr("disabled", true);
    });
</script>

4. Add New Item > Empty Element > called it “AdditionalPageHeadElement”. Populate the Elements.xml into:

<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <Control Id="AdditionalPageHead" Sequence="90" ControlSrc="/_ControlTemplates/15/CustomDisableFolder/AdditionalPageHeadUserControl.ascx"></Control>
</Elements>

5. Add New Item > Event Receiver > ListAdded Event Receiver > called it “ListEventReceiver”. Populate ListAdded event to:

public override void ListAdded(SPListEventProperties properties)
{
 base.ListAdded(properties);
 SPSecurity.RunWithElevatedPrivileges(delegate()
 {
  using (SPWeb currWeb = new SPSite(properties.SiteId).OpenWeb(properties.Web.ID))
  {
   SPList currList = currWeb.Lists.TryGetList(properties.ListTitle);
   if (currList != null && currList.AllowDeletion)
   {
    currList.EnableFolderCreation = false;
    currList.Update();
   }
  }
 });
}

6. Add New Item > Event Receiver > ItemAdding Event Receiver > called it “ItemEventReceiver”. Populate ItemAdding event to:

public override void ItemAdding(SPItemEventProperties properties)
{
 base.ItemAdding(properties);
 if (properties.List != null && properties.List.AllowDeletion && properties.AfterUrl.IndexOf("/New folder") > 0)
 {
  properties.ErrorMessage = "Folder is not allowed, use metadata instead to provide additional information to a file.";
  properties.Status = SPEventReceiverStatus.CancelWithError;
 }
}

7. Add FeatureActivated Event Receiver to the Feature and set the Feature Scope to Site.

public override void FeatureActivated(SPFeatureReceiverProperties properties)
{
 SPSecurity.RunWithElevatedPrivileges(delegate()
 {
  using (SPSite site = new SPSite(((SPSite)properties.Feature.Parent).ID))
  {
   foreach (SPWeb eachWeb in site.AllWebs)
   {
    foreach(SPList list in eachWeb.Lists)
    {
     if (list != null && list.AllowDeletion )
     {
      list.EnableFolderCreation = false;
      list.Update();
     }
    }
   }
  }
 });
}