We might come across scenarios where we must work with “attachments”. Ideally, SharePoint libraries are the answer, but due to various reasons, we might still have to use lists rather than a library. Now, there is no direct means to make an “Attachments” field mandatory in SharePoint Lists. But, we can very easily work around this with a some tweaks here and there. Read on to know how!

How To Make Attachments Mandatory In SharePoint Lists

This article explains how file attachments can be made mandatory in Lists. It can be done in two different ways.

CSOM method of making list attachments mandatory
InfoPath way of making list attachments mandatory

We will show these methods in a simple list in SharePoint 2010 – Employees, that contains 4 columns.

CSOM method of making list attachments mandatory

This method makes use of the PreSaveAction() method of SharePoint. This method allows us to override the behavior of a “Save” button.

Step 1

Open the list. Right-click “Add new item” and open the page in a new tab. Our goal is to edit the newform.aspx page.

Step 2

Edit the page and add a content editor webpart.

Step 3

Edit the content editor and add the below code,

function PreSaveAction() {
var myAttachments = document.getElementById("idAttachmentsTable");
if (myAttachments == null || myAttachments.rows.length == 0) {
document.getElementById("idAttachmentsRow").style.display = 'none';
alert("Attachments are mandatory for this list. Please attach the appropriate files");
return false;
} else {
return true
}
}

This concludes the steps. Now users will not be allowed to save the list item without attaching a document.

InfoPath way of making list attachments mandatory

The outline of this method is basically creating a hidden text box that holds the name of the attachment file. Then by creating a validation rule we make sure that the attachment isn’t empty.

Step 1

Open the list for editing in InfoPath,