How to create SharePoint Online add-in with ASP.NET Core 2.1

While support of .NET Core for SharePoint CSOM libraries on its own way (still no ETA), you can create a SharePoint add-in with ASP.NET Core 2.1 today. Of course, it adds some inconveniences, but at least you can target the latest version of ASP.NET. I’ve created a sample project at GitHub here so you can easily try it. This post describes how to configure everything to run it.

First of all, a few drawbacks worth mentioning:

- you can’t use F5 experience in Visual Studio for convenient debugging. Instead, you should manually upload your app into a site and attach Visual Studio to running web application.

- you can’t target a project to netcoreapp. Obviously you can’t do it because SharePoint CSOM for .NET Core is not available yet. That’s why you have to retarget your project to .NET Framework instead. Which means that you lose cross platform feature. If that’s essential thing for you, then you should wait for official .NET Core support. 

- solution described here only works for SharePoint Online. On-premises is a completely different story and out of the scope of the post

Let’s get started. More...

Stylelint with SPFx integration

Are you TypeScript developer? I bet you use tslint in all your TypeScript projects! If not – start using it. SharePoint framework has tslint step which validates your code against tslint rules, which is awesome. More and more web developers today also use stylelint. Stylelint can be easily explained in just three words – linter for css/scss. Modern web developer (and of course modern SharePoint developer) has to write a lot of css or scss code. So why don’t we lint css code as well? Checkout increasing interest in stylelint at npmtrends:

SharePoint Framework in current version doesn’t have built-in stylelint support. However we can easily fix it with custom gulp subtask. Let’s do it right away! More...

What’s new and what’s changed in SharePoint Online REST API in October 2018

It’s November and it’s time to review changes in SharePoint REST API in October with help of SharePoint RESE API Explorer. As usual I have to put below caution:

Please note, that all changes are gathered from Targeted tenant. Most likely this changes haven’t been officially introduced yet, use this post as spoilers to potential upcoming features. If you want to use APIs mentioned here, please check corresponding official documentation to make sure they are available.

With REST API explorer you can navigate between different endpoints, explore their structure, methods, classes and parameters. REST API explorer uses _api/$metadata endpoint to get the REST API data, parses it and presents in tree view format. REST API explorer also stores historical $metadata results in Azure storage making it possible to compare $metadata results we have today and month ago. More...

TypeScript Tips: How to reduce the size of a bundle

While developing with TypeScript, you might notice that your bundle size becomes bigger despite all minification techniques. Of course, as your code grows, your bundle will also grow. However there is one hint, which might help you and reduce the size of a resulting bundle. The hint works really good for web projects, which use TypeScript together with webpack. It also means, that this hint is applicable to SPFx solutions as well.

The new size of a bundle heavily depends on your TypeScript code, TypeScript features you use and the amount of TypeScript files you have in your solution. For small solutions it might not work, for mid and big ones it definitely works. Anyway you can verify it on your own solution to see the difference. Let’s get started! More...

I added newsletter to my blog

Finally I found a time and managed to integrate my blog with proper mail newsletter provider. I used to use built-in BlogEngine widget for that purpose, however I received a lot of bot subscribers. That caused me a lot of troubles, because I received tons of emails saying that email was not delivered, I was blocked by spam filter, suspicious activity and so on. Recently I’ve integrated MailChimp into BlogEngine and starting from today you have an option to receive an email notification about new post in my blog.

If you wish to, you can use this direct link, or use “Subscribe to newsletter” widget in the left or just use popup window (once you close it, it will no longer bother you) to enable notifications for your inbox.

Get Hygge with it – Your 5 Step Guide to ESPC18

This year I again speak at European SharePoint, Office 365 & Azure Conference as known as ESPC (18 edition). It was a real pleasure to speak first time in Dublin last year. There were a lot of remarkable and exciting sessions. This year's conference promises to be even more interesting. Conference team prepared a few simple steps for you to get most out of the conference. Check it out: More...

What’s new and what’s changed in SharePoint Online REST API in September 2018

A few months ago I’ve created a site, where you can explore SharePoint REST API - SharePoint REST API Metadata Explorer. With REST API explorer you can navigate between different endpoints, explore their structure, methods, classes and parameters. REST API explorer uses _api/$metadata endpoint to get the REST API data, parses it and presents in tree view format. REST API explorer also stores historical $metadata results in Azure storage making it possible to compare $metadata results we have today and month ago. I’ve added a new section to REST API explorer called SharePoint REST API Change Log. With change log you can explore what was changed in SharePoint APIs in the last few months. More...

Azure DevOps stories. Run PnP-PowerShell scripts in your build with ease!

A few times ago I wrote a post on how to run PnP-PowerShell in your Azure DevOps build. Described method is a bit inconvenient (hello @waldekm :)), because you have to setup a code, which automatically installs PnP-PowerShell module. You should repeat it for every PowerShell script step. What if I want just put my PnP-PowerShell code in file, run it and that's it?

To make things easier, I've created a custom build\release step for Visual Studio Team Services (now Azure DevOps) called (guess how) - PnP-PowerShell. This step significantly simplifies the way you run PnP-PowerShell commands in Azure DevOps. More...

You might experience errors when first trying new SPFx 1.6 features

SPFx 1.6 was released recently with new features which support secure connection to Azure AD protected APIs. During upgrade some things in your tenant and Azure AD were changed. For some users migration didn’t go smoothly and they saw strange errors in different places. I’m in the group of users who experienced errors and had to fight with them. Fortunately really smart guys from Microsoft and community resolved everything. There are a few issues on GitHub related to SPFx 1.6 errors. It might be difficult to go through all comments and find an answer on your concrete problem. I see that more and more people struggle with the same types of errors, I sum up potential errors and their resolutions in a separate post.

Basically there are two types of errors you might see when trying SPFx 1.6 features. They are described at GitHub SPFx The user or administrator has not consented to use the application with ID and SPFx suddenly stopped working; experimental feature error. More...