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ASP.NET Core ModelState Validation Filter

During my code review sessions I see a lot of duplicate for the ModelState validation like

1public async Task<IActionResult> AddAsync(PersonAddSubmitModel model)
2{
3    if(ModelState.IsValid)
4    {
5        return BadRequest(ModelState);
6    }
7
8    // ......
9}

But it makes no sense to use the same code in every action to validate your submit model. It can be easier!

Convert ext4 file system to the new btrfs on a Synology NAS

After five years I decided to replace my Synology DS213air with a new Synology DS718+.

The reasons were:

• More power
• Support to run Docker
• Hardware Encryption

Now, If you want to use Docker on Synology, you have to switch to the new filesystem Btrfs.

Easily update all git submodules

I often use a larger Visual Studio solutions to handle a bunch of simple NuGet projects. And more often I only update references or NuGet packages.

Set up a really cheap build agent to support NPM 5 and Angular 5 in Visual Studio Team Services

Visual Studio Team Services (VSTS) - I will name it just Team Services - is the best and most powerful tool for work items, code repositories, continuous integration and release management at one place.

ASP.NET Core - Using TempData

TempData is next to ViewBag and ViewData a common way to handle data for Requests and Views.

ViewData and ViewBag is only available in the current request and current View. TempData has the functionality to store data from one request to another. Keys inside TempData will be removed if you read them once!

ASP.NET Core 2.0 Upgrade causes HTTP 502

A lot of guys run into an error during the upgrade fom ASP.NET Core 1.x to ASP.NET Core 2.0:

HTTP Error 502.5 - Process Failure

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Verleihung Microsoft MVP 2017

Am 1. Juli 2017 war es wieder so weit: und es hat geklappt.

Nach den Jahren 2015 und 2016 hat mich Microsoft zum dritten Mal in Folge als Microsoft MVP ausgezeichnet! Weiterhin ist meine zugehörige Kategorie Visual Studio and Development Technologies.

Aktualisierung meiner Entwicklermaschine

Nun war es wieder so weit: es kam die Zeit für die neue Heim-PC Hardware.

Bisher hatte ich folgendes Setup:

Disable Windows 10 Game Mode

Sometimes I play games like Rocket League. Not very active, but sometimes.

In the past my playtime was laggy. I thought my graphic card is not powerful enough so I updated from a nVidia 770 to a 1070. But still the same laggy moments while playing games. Money wasted.

Partnerschaft DWX 2017

In Zusammenarbeit mit der DWX verlost das Team von myCSharp.de Tickets für die Developer Week, die vom 26. bis 29. Juni in Nürnberg stattfindet.