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Showing posts from September, 2016

Show\Hide columns in the SharePoint default list forms

Here are two cases that I face in the daily work with SharePoint which I find very common and would like to provide some technical details.

1. Hide Yes\No column
If you want ho hide an Yes\No column inside content type, surprisingly you find that you can't.

Or to be more specific, the SharePoint interface won't allow you to do it.
I'm not sure why is that limitation but тхис is technically supported by SharePoint.
Here is a JavaScript that modifies the column visibility. You just need to run it with user who have appropriate rights.

var context = SP.ClientContext.get_current(); var siteContentTypes = context.get_web().get_contentTypes(); // add the GUID of you ContentType var myContentType = siteContentTypes.getById("0x010100185E5E735545B942852F513AEB77B51C"); var fieldLinks = myContentType.get_fieldLinks(); context.load(myContentType); context.load(fieldLinks); context.executeQueryAsync( function (sender, args) { var listEnumerator = fieldLinks.getE…

Load dynamically JavaScript file inside Custom Action

This starts to be very common scenario in the SharePoint online projects:

You want to have custom actions (“My Action”) that execute custom logic. The main challenge is how to load the JavaScript file with this custom logic (/sites/demo/SiteAssets/Actions/dts.demo.script.js) only when the custom action needs it.
One approach described in many posts is to use a Script link.  Here is a working example:
function RegisterScriptLink() { var scriptBlock = 'var headID = document.getElementsByTagName("head")[0];var newScript = document.createElement("script");newScript.type = "text/javascript";newScript.src = "' scriptBlock += '/sites/demos/SiteAssets/Actions/dts.demo.script.js' + '?ver=' + ((new Date()) * 1); scriptBlock += '";headID.appendChild(newScript);'; var context = new SP.ClientContext.get_current; = context.get_web(); var collUserCustomAction = thi…

The column name that you entered is already in use or reserved. Choose another name.

The problem: 
You want to create column with a specific name in SharePoint but SharePoint gives you the message "The column name that you entered is already in use or reserved. Choose another name."

Why this is a problem?
Because you need to create custom columns and content types using the default SharePoint interface.
And the business users have to see properly named columns - for example "Description", not "My Description".

It is important to know something technical about SharePoint (versions Office 365, 2013, 2010):
 - it supports columns with same Display Names.
 - you can’t have columns with same Internal names

Let’s implement the following common scenario:
You are creating a SharePoint customization and you need the following column:
   Type: Multiple lines of text
   Internal Name: MyProjectDescription
   Display Name: Description

 Here is the correct way to achieve it:
1. Create the column MyProjectDescription.
This will create column with I…