ASP.NET Core, Blazor, .NET, Azure, SharePoint, IoT
Most of requests to controller actions of our ASP.NET Core applications send some simple parameters or some serialized model objects. But this is not always the case. There are also those requests we don’t want to map to models but we need the request body to process, save or use it some other ways. This blog post shows how to read request body in ASP.NET Core controller action.
Read moreTag helpers are classes that can be applied to HTML and special tags in ASP.NET Core views. They are addition to HTML helper extension methods and they provide more flexibility by having their own classes and supporting framework level dependency injection. This blog post demonstrates how to create tag helper to support displaying paged results in ASP.NET Core views.
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Microsoft announced roadmap for upcoming release of .NET Core family versioned as .NET Core 2.1. While there are some new features and many improvements coming I compiled a list of my favorites that I see as most imortant to all developers building solutions on .NET Core, ASP.NET Core and Entity Framework Core.
Read morePaging of data in ASP.NET and ASP.NET Core applications is timeless topic. It is invented over and over again and asked all the time in forums all over the world. Years ago I worked out kind of universal solution with reusable UI artifacts and I’m using these pieces this far. As ASP.NET Core is gaining more and more popularity I decided to start my sample solution with .NET Core and add full ,NET Framework and ASP.NET MVC 5 support later if asked.
Read moreMy previous blog post introduced how to make ASP.NET Core 2 web application run on Windows 10 IoT Core. It was default web application created on Visual Studio and published as an executable. But this is not enough for IoT scenarios. When we build web application that runs on IoT board we need this application to do something. Be it displaying sensor data or controlling some hardware. This blog post shows how to make Windows 10 IoT background task talk with web application using WebSocket.
Read moreIt has been problematic to run ASP.NET Core applications on Windows 10 IoT Core as it is not officially supported scenario yet and many components we are used with are not built with Windows 10 ARM in mind. Still it easy to run web applications on Windows 10 IoT Core using ASP.NET Core 2. There are few tricks developers should know when building web applications for Windows 10 IoT Core. This blog post is short guide about ASP.NET Core 2 on Windows 10 IoT Core
Read moreWindows 10 has something called Windows Subsystem for Linux and this something enables us to run Linux applications on Windows 10 using Linux without need for Hyper-V or other virtual machines. When building multi-platform applications like my open-source TemperatureStation solution then having Linux right there for testing comes very handy. This blog post shows how to get Linux running on Windows, how to install .NET Core and how to run web applications on Linux.
Read moreASP.NET Core introduces Node services that allow applications to run Node scripts on server. We can send data from controller action to Node script and get back some output we can use in view. This blog post shows how to use Node services to render d3.js charts on server-side to PNG files.
Read moreAnother day, another surprise on .NET Core. Tried to load a file with Windows-1252 encoding and got the following exception: NotSupportedException: No data is available for encoding 1252. For information on defining a custom encoding, see the documentation for the Encoding.RegisterProvider method. Here’s how to solve the problem.
Read moreWhen running ASP.NET Core on IIS one may get weird error Application ‘
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.
Read moreMy saga on supporting multiple tenants in ASP.NET Core web applications has come to point where tenants can use separate databases. It’s time now to write some tests for data context to make sure it behaves correct in unexpected situations. This post covers unit tests for data context and multi-tenancy.
Read moreMy 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.
Read moreLet’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.
Read moreIn 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.
Read moreThere 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.
Read moreMy previous post about ASP.NET Core and getting C# enums to JavaScript was primitive and used simple attribute on enums to detect ones we need in JavaScript. This blog post extends the idea and makes some generalizations to support also those enums that are located in the libraries we don’t control or on what we don’t want to apply attribute.
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Entity Framework Core 2.0 introduces global query filters that can be applied to entities when model is created. It makes
Read moreEntity 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.
Read moreIn my previous posts about enums I covered how to convert C# enums to JavaScript on classic ASP.NET MVC. This blog post introduces how to do it on ASP.NET Core using simple view component.
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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.
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