Blazor 10: Never Lose State Again with Circuit Persistence

One irksome problem that plagues many Blazor Server programs is that the circuit status is lost once a user disconnects. This implies that the user must restart, counters are reset, and form data is lost.

Circuit Persistence, a revolutionary feature that enables your component state to withstand reconnections, is introduced by Blazor with.NET 10. We’ll examine what it is in this post and use a straightforward example to demonstrate how it works.

Problem in Previous Versions

Here’s a basic counter component in older Blazor versions:

If the connection to the server drops and reconnects, it currentCount resets to 0. That’s frustrating for users. So Blazor 10 solved this problem below

Solution in Blazor 10

Blazor 10 adds the attribute [SupplyParameterFromPersistentComponentState] to help persist the component state. Let’s rewrite the counter using it:

When you lose the connection, see the image below, and the Current count is 3.

Now, even if the server connection drops, the counter value will continue from where the user left off after re-connection, and the Current count is 4

Benefits of Circuit Persistence

No unexpected resets – state survives connection loss.
Great for banking, e-commerce, and form-heavy apps.
Improves user experience significantly.

Conclusion

Blazor 10 takes a big step forward in reliability with Circuit Persistence. If you’re building Blazor Server apps, this feature can dramatically improve the user experience by preventing frustrating state resets. Start experimenting with it today, and make your apps more resilient and user-friendly!

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