How to disable Web App feature for a List attachment?

We know that we can make the documents stored in document library open in Office Client by setting the property under Advanced Settings. Similar setting is not available for List. That means, List attachments will always open in browser if that is the default behavior set.

One workaround is, we can disable this behavior at site collection level. You need to be a site collection administrator. Navigate to site collection features and look for "Open Documents in Client Applications by Default". Activate this feature.

Site Collection Feature

Now all the documents in List or Document Library will open in Office Client.

However, you can still change the behavior for document libraries by navigating to Library Settings -> Advanced Settings and set the value of "Opening Documents in the Browser" to "Open in the browser" as shown below.

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How to get SharePoint List or Library GUID via REST

Sometimes, you would need List or Library GUID to use that in some operation. In such cases, how do you get hold of GUID using REST API? There is a straight-forward end point which you can use: /_api/web/lists/getByTitle('ListTitle')/Id This will return the GUID of a List or Library. There is also another approach. However this approach works only if a List or Library contains at least one item. /_api/web/lists/getByTitle('ListTitle')/items This is a familiar end point which we use to fetch items of a List or Library. To get the GUID from the response, you would do: var listIDTemp = response.data.d.results[0].__metadata.id; var listID = listIDTemp.substring(listIDTemp.lastIndexOf("guid") + 5).split('\'')[0]; As you can see, we are doing string operations to fetch GUID from metadata.id. This contains information only if the response has at least one item.

All about SharePoint List View Styles

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Get User Id using REST or JavaScript Object Model

Sometimes you would need to fetch the User Id based on either Login name or Email id. You would need User Id if you need to assign a user object to a people picker control or People/Group field. How do we get the Id based on Email or Login Name in client side development? We can achieve that using JavaScript Object Model or REST API. Let me share the first example using JavaScript Object Model (JSOM). var context = new SP.ClientContext.get_current(); this.user = context.get_web().ensureUser(loginName or Email); var o = { d: d, user: this.user }; context.load(this.user); context.executeQueryAsync( Function.createDelegate(o, ensureUserSuccess), Function.createDelegate(o, Fail) ); The above code fetches User Id for a given Login Name or Email Id. Interestingly, there is no equivalent endpoint available in REST! The Microsoft documentation talk about a endpoint but I could not get it working. So what is the way to get User Id using REST? You have to use the hidd

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