4 09 2017
In multi-tenant applications where tenants share same data store cross-tenant operations must be avoided. There are many ways how bugs like this can happen. Be it hard to debug threading issue or some other complex situation, it is better when application components are ready for this kind of situations and better fail instead of going to glory end with illegal operations. This blog post introduces defensive database context that throws exception when data from other tenants is about to be updated.
24 08 2017
My last post about multi-tenants applications with ASP.NET Core Implementing database per tenant strategy on ASP.NET Core I proposed some ideas about tenant providers but I didn’t focused on issues related to missing tenants. This post proposes missing tenant middleware that redirects faulty requests to some public page of company web site.
23 08 2017
Let’s continue with multi-tenancy in ASP.NET Core web applications and focus on solutions where every tenant has its own database. It’s not only about database – there can be more services where every tenant has its own instance. It makes solution provided here easily extendable to also other services besides SQL Server or any other relational database.
22 08 2017
In my previous post about global query filters in Entity Framework 2.0 I proposed an idea how to automatically apply filters to all entities so they are always coming from same tenant. This post digs deeper to possible solutions for detecting current tenant in ASP.NET Core we applications.
21 08 2017
There are not much examples available about ASP.NET Core and acquiring access token. I found good and pretty big sample by Microsoft Patterns & Practices called multitenant-saas-guidance, Based on this I wrote my simple “boiler plate” ASP.NET Core solution that authenticates against Azure Active Directory and asks current user data using Microsoft Graph.
17 08 2017
16 08 2017
Entity Framework Core 2.0 introduces global query filters that can be applied to entities when model is created. It makes it easier to build multi-tenant applications and support soft deleting of entities. This blog post gives deeper overview about how to use global query filters in real-life applications and how to apply global query filters […]
15 08 2017
Entity Framework Core 2.0 was announces yesterday and it brings some new and cool features. One of them is SQL Like-operator we can use now using directly in our code. Here is the example of using new Like-operator.
14 08 2017
Today Microsoft announced versions 2.0 of .NET Standard, .NET Core, ASP.NET Core and Entity Framework Core. Also new updated to Visual Studio 2017 are available (both stable and preview version). This blog post is summary of most important features announced today.
14 08 2017
11 08 2017
One quick code note to make during building my Azure Cognitive Services demo application. I needed a way how to convert colors of System.Drawing to hex strings that I can use in views. Here is my simple and elegant solution.
9 08 2017
8 08 2017
My previous post about Azure Cognitive Services described how to detect faces on photos. In this post I will focus on identifying people on photos. This post is based on my Azure Cognitive Services sample application that has most of Face API support implemented and the goal is to describe identifying process in brief and also show some code I have written.
7 08 2017
1 08 2017
Ever wondered about mixing up simplicity and flexibility of PHP with power and performance of .NET Core? The solution is coming and it is called Peachpie, the successor of Phalanger. This blog posts introduces Peachpie – the tool to compile PHP code to .NET Core – and helps to get started with it.
20 07 2017
When testing ASP.NET Core controllers in application that uses Azure AD we need usually current user at least for some tests. As there is no authenticated user when unit testing, we need to create one by our own. This blog post shows how to create claims identity for ASP.NET Core unit tests.
10 07 2017
With ASP.NET Core 2.0 Preview 2 there are new web application templates available for Single Page Applications (SPA). Currently Angular, React.js and React.js + Redux are supported. This blog post gives short overview of new templates and related sample application.
5 06 2017
ASP.NET Core 2 will come with full support for VB.NET. In current preview we can use VB.NET to build .NET Core applications. I was still successful on mixing up C# and VB.NET project files and port C# code over to VB.NET and build proof-of-concept level web API applicaton that returns fake data about current weather in different cities.
24 05 2017
ASP.NET Core 2 comes with Razor Pages that allow developers to build simple web applications with less overhead compared to MVC. The emphazise is on the word “simple” as Razor Pages doesn’t come with patterns suitable for bigger and more complex applications. For this we have MVC that is flexible enough to build applications that will grow over years. This blog post uses simple shoutbox application to illustrate how to build applications using Razor Pages.
19 05 2017
With ASP.NET Core 2 we get another way of building web applications. It’s one of those new things that is actually forgotten old thing and it is called Razor Pages. Are we going back to WebMatrix days? This blog post is short introduction to Razor Pages in ASP.NET Core 2.