Best Practice for Tough Web Applications

In developing modern web, providing reliable and tough user experience is very important for the company’s class applications.

With the exception of handling Blazor serverMicrosoft introduces a strong model that connects clients and servers through Signalr, allowing real-time web applications to use .NET. However, this persistent connection also introduces unique challenges in managing exceptions effectively.

This blog explores the life cycle of exceptions to the blazor server, identifies public traps, and offers a practical strategy for implementing strong errors – ensuring application stability and increasing user confidence.

Understand the life cycle of exceptions on the blazor server

In the Server Blazor application, the user interaction in Frontend is closely combined with backend operations via signalr. This means that exceptions can occur anywhere in the chain – from UI events to fire calls.

SUMMARY OF ADDITIONAL FLOWS:

PGSQL

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User Actions ➜ UI Event UI ➜ Component Code ➜ Service layer ➜ API/database ➜ Exception ➜ Logging ➜ UI feedback

Every exception that occurs in this flow must be captured and handled by the server side to prevent application crash or decrease in connection.

General technical trap in handling blazor errors

1. Do not capture exceptions in the ASYNC method

Ignoring to use try-catch in the asynchronous method can cause an unexpected application or behavior crash.

Poor implementation:

CSHARP

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Private Loaddata Async Task ()
{
var result = waiting for dataservice.getdataasync (); // traffic application if this fails
}

Appropriate implementation:

CSHARP

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Private Loaddata Async Task ()
{
try
{
var result = waiting for dataservice.getdataasync ();
}
Catch (Exception Ex)
{
logger.logerror (ex, “error loading data.”);
errmentnessage = “failed to load data.”;
}
}

2. UI does not recover with Anggun after the mistake

If an error occurs during rendering, users can see a damaged screen or lose functionality.

Solution: Wrap rendering logic to ensure elegant fallback.

razor

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@if (Haserror)
{

}
if not
{

}

3. Handling of lost centered errors

Handling exceptions in each component can cause scattered and inconsistent behavior.

Solution: Use the default errorboundary component at .net 7+ to isolate and manage errors effectively.

razor

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Oops! Something broken.

Real World Problems: Unwashed exceptions can break the signalr connection

In the blazor server, unwashed exceptions can destroy the signalr circuit, which causes lost connections and requires users to refresh manually – potentially cause data loss.

Recommended Approach: Life Cycle Circuit Tracks with Circuithandler

CSHARP

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ErrortrackinginginCruithandler Public Class: Circuithandler
{
Private Readonly Ilogger Logger;

Public errortrackingcirkuitharandler (ilogger Logger)
{
this.logger = Logger;
}

Public override oncircutclosedasync (circuit circuit, cancellatingitoken cancellatingotoken)
{
logger.logwarning (“Closed circuit: {id}”, circuit.id);
return base.oncircutclosedasync (cancellatingontekn);
}
}

Register on Program.cs:

CSHARP

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builder.services.addscoped ();

The best practice for handling exceptions on the blazor server

To ensure your application is tough and ready for production, the following practice adoption:

• ✅ Always wrap the ASYNC method by trying

• ✅ Displays a user -friendly error message

• ✅ Use structured logging for search

• ✅ Use errorboundary for UI exception

• ✅ Create an error service that can be reused to standardize responses

• ✅ Termination Monitor Using Sirkuishandler

Advanced tips: try again logic for temporary failure

Add another try mechanism for operations that may fail temporarily (for example, network calls).

CSHARP

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ASYNC Public Duties Tryexecutewithretry (Func > Action, int retries = 3)
{
Int Efforts = 0;
while (try
{
try
{
return wait action ();
}
Catch (Exception Ex)
{
logger.logwarning (ex, $ “effort {try + 1} failed.”);
Efforts ++;
waiting for the task. Delay (500);
}
}
Logger.logerror (“All efforts try again to fail.”);
restore default;
}

Conclusion

Control Handling exceptions in Blazor Server It is very important to provide stable, measured, and safe applications.

From dealing with the failure of the ASYNC method and using errorboundary, to tracking the termination of the circuit and trying to return to the failure operation – This strategy not only prevents crash but also builds trust with users.

For the company’s business and startups that develop important applications with blazor, investing in the exact exception management is not optional – that is a necessity.

Additional resources: