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Web Development with Blazor

You're reading from   Web Development with Blazor A practical guide to building interactive UIs with C# 12 and .NET 8

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Product type Paperback
Published in Apr 2024
Publisher Packt
ISBN-13 9781835465912
Length 366 pages
Edition 3rd Edition
Languages
Tools
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Author (1):
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Jimmy Engström Jimmy Engström
Author Profile Icon Jimmy Engström
Jimmy Engström
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Table of Contents (22) Chapters Close

Preface 1. Hello Blazor FREE CHAPTER 2. Creating Your First Blazor App 3. Managing State – Part 1 4. Understanding Basic Blazor Components 5. Creating Advanced Blazor Components 6. Building Forms with Validation 7. Creating an API 8. Authentication and Authorization 9. Sharing Code and Resources 10. JavaScript Interop 11. Managing State – Part 2 12. Debugging the Code 13. Testing 14. Deploying to Production 15. Moving from, or Combining with, an Existing Site 16. Going Deeper into WebAssembly 17. Examining Source Generators 18. Visiting .NET MAUI 19. Where to Go from Here 20. Other Books You May Enjoy
21. Index

Lifecycle events

We can use a couple of lifecycle events to run our code. In this section, we will go through them and see when we should use them. Most lifecycle events have two versions – synchronous and asynchronous.

OnInitialized and OnInitializedAsync

The first time the component is loaded, OnInitialized() is called, then OnInitializedAsync(). This is a great method to load any data, as the UI has not yet been rendered. If we are doing long-running tasks (such as getting data from a database), we should put that code in the OnInitializedAsync() method.

These methods will only run once. If you want to update the UI when a parameter changes, see OnParametersSet() and OnParametersSetAsync().

OnParametersSet and OnParametersSetAsync

OnParametersSet() and OnParametersSetAsync() are called when the component is initialized (after OnInitialized() and OnInitializedAsync()) and whenever we change the value of a parameter.

If we, for example, load data in...

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