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Web Development with Blazor

You're reading from   Web Development with Blazor A practical guide to start building interactive UIs with C# 11 and .NET 7

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Product type Paperback
Published in Mar 2023
Publisher Packt
ISBN-13 9781803241494
Length 360 pages
Edition 2nd Edition
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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 2. Creating Your First Blazor App FREE CHAPTER 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. Deploy to Production 15. Moving from, or Combining, 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

There are a couple of lifecycle events we can use 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

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

These methods will not run again if a parameter changes (see OnParameterSet() and OnParameterSetAsync()).

OnParametersSet and OnParametersSetAsync

OnParameterSet() and OnParameterSetAsync() 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 the OnInitialized() method...

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