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Real-Time Downtime Control

SignalR & Angular: Building Dynamic Maintenance Pages for ASP.NET Core

Build a Maintenance UI with SignalR Notifications in Angular, ASP.NET Core with Dapper, and SQL Server

7 min readFeb 27, 2025

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The combination of very tangible and very personal steps constructs an almost press-button solution to maintenance targeting the app stack.

Tried to quickly fix your app by taking the application offline, only to leave error messages on your users’ screens, making them scratch their heads about why their screen is blank? Yeah, been there as well. Running frantically to push an update while the inbox punctuated with confused user messages at the speed of light, the best remedy for such a state of affairs? It is none but a maintenance page. It can be deployed with real-time notifications. This article is gonna focus precisely on tweaking an existing Angular front-end, ASP.NET Core API with Dapper backend and SQL Server database app with the deployment/maintenance page. Enabled by an admin, where all users get redirected to a sleek UI showing a message, incident number, and downtime window instantly through SignalR. Ready to keep your users in the know during maintenance? Let’s get cracking.

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Towards Dev
Towards Dev

Published in Towards Dev

A publication for sharing projects, ideas, codes, and new theories.