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Microsoft Blazor Tutorial (1/5): Building a Status Page

Dominic FreiPublished Sep 06, 2022 • Updated Sep 07, 2022
.Net FrameworkAtlasCSharp
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Have you ever built an application that consisted of multiple different systems that you had to observe and make sure they run properly? Some services might offer to send notifications, like MongoDB Atlas or Microsoft Azure App Service. They might not always offer all the channels you want to use, though, like Slack or Discord. One of the many approaches to always keep track of all the system statuses is to create a status page that lets you see an overview of all systems at once.
This is what this tutorial will be dedicated to. There are several parts to it, each of them being its own small lesson on a specific topic. Go ahead and jump into the one you are interested in. They are more or less independent of each other.
The series consists of the following parts:
  • Part 1: Introduction to Blazor: Creating a simple web page (this tutorial)
  • Part 2: Retrieve data from MongoDB Atlas (coming soon)
  • Part 3: Retrieve status from healthchecks.io
  • Part 4: Retrieve status from sentry.io
  • Part 5: Retrieve status from MongoDB Atlas
  • Part 6: Retrieve status from Microsoft Azure App Service
  • Part 7: Retrieve status from Amazon Web Services
In this first part, we will have a look at Blazor, how to create a new Blazor app, and creating a new page and a very simple, static status page. Each successive part will then be dedicated to making the status page more dynamic step by step and actually retrieving the data that we need.

Prerequisites

Before we can actually begin, let's point out what you should take care of before starting with the tutorial.
For this part specifically, we need to:
Note that I am using Rider for this tutorial. If you use Visual Studio or another IDE, some terms might be slightly different or menus might be in a different location.

The architecture of our Blazor application

The architecture of the final result is not overly complicated but to give you a quick overview right at the start, let's look into all the components involved.
The status page and its services will be built using Blazor. The deployment will then be done using the Microsoft Azure App Service, which hosts the status page on Azure.
The status page retrieves the information about the systems we are interested in via MongoDB Atlas.
Each status is checked by an independent microservice that could theoretically be deployed individually. For the sake of making this tutorial as easy to understand as possible and focusing on the important bits, we will keep everything in one Blazor app for now.

Create a new Blazor project

Let's start by creating a new project! The Blazor Server app template already contains a good basic structure that we can reuse to create our status page on top of it and also learn the basics of using Blazor at the same time. Great, isn't it?
Depending on your IDE of choice, you want to choose Blazor Server App (Microsoft Visual Studio 2022 or ASP.NET Core Web Application (JetBrain Rider—as can be seen in the screenshot).
Alternatively, if you prefer to work with the terminal, create a new Blazor Server app by calling:
In this tutorial, we will work with JetBrains Rider, but all three of those options will create the same project structure.
Before we actually change anything, go ahead and run the app to get an idea of what we start with.
The result should look something like this:

Set up the UI for the status page

If you have successfully started and seen the Hello, world! template example, you're ready to start creating the actual status page.
Let's first create a simple yet information-packed page that will later on hold all we need on one single page.
Since this tutorial focuses on the backend side of things, we will not spend too much time with the UI. In fact, the template already provides something similar to what we are looking for and you can use it as a reference if your HTML is as rusty as mine!
Have a look at the Fetch data page of the template:
Let's start by adding a new Razor Page to our Pages:
Call the new page Status and choose the type Page:
The newly created file will contain a couple things. The keyword @page let's Blazor know which link to generate to actually access the page. If you restart your app (or hot reload), you can now access https://localhost:7042/status.
Blazor automatically added the title as an h3 tag into the file as well along with a code block that needs to be filled out by us.
Another convenient feature is that the menu bar is automatically embedded. The new page is missing, though.
When the project was created, the file Shared/NavMenu.razor was added as well. If you jump into it, you will see the three menu items Home, Counter, and Fetch data, each in their own div element containing a NavLink.
All we need to do here is add another link within the nav block:
The file should then look like this:
Now let’s continue on to the final step: the actual content of the status page. As mentioned before, a simple table like in Fetch data will do for this tutorial. To create a table with some stub data in the structure we need later, add the following code just below the h3 tag in Status.razor:
Here’s our final (mocked) status page for this tutorial:

Your turn!

While this was just a first step in creating the status page, we've got our first layer done: the UI!
Now it's time for you to head over to Github, download the code for this tutorial, and play around with it. Kudos if you've coded along right away! Change the look of the status page, add more pages, or head over to the Blazor documentation to find out even more about it.
If you have any questions at any point, please tweet @dominicfrei or come visit us in the MongoDB Developer Community Forums!

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