Latest Entries

Partials and AJAX In Razor Pages

calendar_today 07 September 2018 15:57

AJAX ASP.NET Core Razor Pages

Updating portions of a page using AJAX and partial views is a routine task in ASP.NET MVC applications. The experience is little different in ASP.NET Core Razor Pages - not much, but enough to stump some people. Here is some advice on accomplishing this task, and a preview of some additional help coming in the near future.

Areas In Razor Pages

calendar_today 03 September 2018 08:01

ASP.NET Core Razor Pages

Support for Areas was added to Razor Pages with the release of ASP.NET Core 2.1. They have long been used in MVC applications as a way to separate logical chunks of large applications into semi-independent modules to facilitate team working etc. Here, I explore how to use areas in a Razor Pages application.

Accessing The Model From Filters In Razor Pages

calendar_today 29 August 2018 08:23

ASP.NET Core Razor Pages

Support for filters was added to Razor Pages with the release of ASP.NET Core 2.1. Filters, for those unfamiliar with them, are components that enable the injection of processing at certain points within the Razor Page lifecycle. They differ from Middleware in that they provide access to the HttpContext. Razor Pages offers a number of different filter options. One of the things that you might want to do in a filter is to obtain data from an external resource (database, web service etc) and then use it in the PageModel or ViewData. Here, I take a look at how you can access the model or ViewData dictionary depending on the type of filter implementation that you choose.

Query Types in Entity Framework Core

calendar_today 15 August 2018 13:46

Entity Framework ASP.NET Core

Query Types, introduced in Entity Framework Core 2.1 enable you to return non-entity types that map to tables or views and can serve as the return type from FromSql method calls.

Razor Pages, TypeScript and Knockout

calendar_today 16 July 2018 07:54

Javascript ASP.NET Core Razor Pages TypeScript

In this article, I look at the steps required to get TypeScript up and running in the context of a Razor Pages application. I discuss why you might want to do this, and I use Knockout for the purposes of demonstration. By the end of the article, I will have configured and used TypeScript to replicate part of the final code for the Single Page Application tutorial from learn.knockout.com.

Improved Cascading Dropdowns With Blazor

calendar_today 05 July 2018 13:27

C# Blazor

In my last article, I looked at the experimental Blazor framework, using Cascading Dropdown Lists as an entry point. Since then, some feedback from Steve Sanderson to a question I asked has shown me a better way to implement this pattern.

Cascading Dropdowns With Blazor

calendar_today 24 May 2018 20:51

ASP.NET Core Blazor

Blazor is an experimental framework introduced by Steve Sanderson of Knockout.js fame (among other things) on the ASP.NET team. The premise of the framework is simple, but potentially game-changing for ASP.NET developers: it enables you to write your client side code in C#. What this means is that rather than having to chase after the latest Javascript-based hotness - Aurelia, React, Angular etc, only to find that they are dependent on learning a whole new load of frameworks, or that they are no longer flavour of the week, you just use the .NET skills that you already have to move your processing to the browser.

Working With JSON in Razor Pages

calendar_today 21 May 2018 13:49

ASP.NET Core Razor Pages

UI generation and processing within web applications is moving increasingly to the client. Data processing and storage is still undertaken on the server, with JSON being the preferred format for exchanging data between the server and the client. There are a number of ways in which you can generate JSON when working with Razor Pages. This article explores some of them.

Extending the Command Timeout in Entity Framework Core Migrations

calendar_today 26 March 2018 08:50

Entity Framework ASP.NET Core

Most migrations that you execute when working with Entity Framework Core are likely to be straightforward - resulting in nothing more than an adjustment to the database schema. Sometimes, however, you might also want to include a task that requires longer than the default command timeout value (30 seconds in SQL Server) such as importing a lot of data.

Publishing Razor Pages Applications - Gotchas

calendar_today 22 March 2018 08:15

ASP.NET Core Razor Pages

I have just completed an article covering publishing a Razor Pages application to IIS on my Razor Pages dedicated site: learnrazorpages.com. While writing it (and publishing revised versions of the site) I uncovered a few stumbling blocks that might catch others out. So I thought they were worth highlighting here in their own post.

ViewModels and AutoMapper in Razor Pages

calendar_today 14 February 2018 08:13

ASP.NET Core Razor Pages

The Razor Pages PageModel class is part controller, part ViewModel. In this article, I take a look at the ViewModel part of the role that the PageModel plays, and how tools like AutoMapper can be used to reduce the amount of code you need to write when assigning values between your entity model and your ViewModel.

I'm Not Writing A Book On Razor Pages

calendar_today 19 January 2018 08:47

ASP.NET Core Razor Pages

That's right - despite a number of questions, I am not writing a book on Razor Pages, the new page-based web development framework released as part of ASP.NET Core 2.0. But I have launched a web site for people who want to learn how to use ASP.NET Core Razor Pages.

Customising Identity in Razor Pages

calendar_today 22 September 2017 14:16

ASP.NET Core Razor Pages ASP.NET Identity

The code for managing authentication in a Razor Pages application that is provided by the standard project template is a good starting point. However, chances are that you want to customise it to fit your own application needs. This article looks at the most common customisation requirements.

Introduction to Identity in Razor Pages

calendar_today 08 September 2017 08:09

ASP.NET Core Razor Pages ASP.NET Identity

Razor Pages uses ASP.NET Identity as its default membership and authentication system. This article is the first in a series that explores the various parts of ASP.NET Identity as it relates to Razor Pages, and starts with an overview of the files generated as part of the project templates.

Sending Email in Razor Pages

calendar_today 20 July 2017 07:24

ASP.NET Core Razor Pages

The Razor Pages framework is not the only thing to be introduced as part of .NET Core 2.0. A lot more of the existing full framework class libraries are also being ported across to .NET Core including System.Net.Mail. That means there is no longer any need to rely on third party libraries or services for email functionality in your .NET Core applications. So I thought I'd take the opportunity to illustrate sending email in a Razor Pages application.

Routing in Razor Pages

calendar_today 11 July 2017 13:28

ASP.NET Core Razor Pages

One of the top level design considerations for the developers of a server-side web application framework is how to match URLs to resources on the server so that the correct one processes the request. The most straightforward approach is to map URLs to physical files on disk, and this is the approach that has been implemented by the ASP.NET team for the Razor Pages framework.

Razor Pages - The Elevator Pitch

calendar_today 25 May 2017 08:29

ASP.NET MVC ASP.NET Core Razor Pages

In the last ASP.NET Community Standup, Jon Galloway gave my introductory Razor Pages article a shout out (thank you, Jon). During the discussion that ensued, Scott Hanselman asked for the "elevator pitch" for Razor Pages. Well, here's mine.

Razor Pages - Understanding Handler Methods

calendar_today 22 May 2017 20:16

ASP.NET Core Razor Pages

Handler methods is a particularly nice feature introduced with the new ASP.NET Razor Pages framework . This feature enables you to determine what the user was doing when they requested the page, and to execute logic accordingly without having to resort to a bunch of conditional code.

Razor Pages - Getting Started With The Preview

calendar_today 15 May 2017 20:52

Razor ASP.NET Core Razor Pages

Current users of ASP.NET Web Pages have been eagerly awaiting news on what ASP.NET Core holds for them (if my inbox is anything to go by). The roadmap suggested that a new version of Web Pages would be forthcoming after the initial release of .NET Core, but that item was subsequently removed. Instead, a new cross platform page-centric web development model called Razor Pages has been made available in preview form. Here, I show you how to get started with it and explore its similarities with Web Pages. In future articles, I will take a closer look at the wide range of differences.

Working With Zip Files In ASP.NET MVC

calendar_today 10 February 2017 07:41

ASP.NET MVC

Since ASP.NET 4.5, zipping and unzipping files can be done with classes from within the .NET framework. Despite that, nearly all examples that illustrate working with zip files in ASP.NET applications feature third party open source compression libraries. This short article attempts to correct that by demonstrating the use of the System.IO.Compression classes to unpack an uploaded zip file, and to create one for download in an ASP.NET MVC application.