Handle errors on asp net core6 mvc

Handling Errors in ASP.NET Core 6 MVC

ASP.NET Core 6 MVC provides a robust error handling mechanism that allows developers to gracefully handle and manage errors that occur during the execution of their web applications. In this article, we will explore various techniques and best practices for handling errors in ASP.NET Core 6 MVC.

Global Error Handling

One of the key features of ASP.NET Core 6 MVC is the ability to handle errors . This means that you can define a central location to handle all exceptions that occur within your application. To enable global error handling, you can use the UseExceptionHandler middleware in your Startup.cs file:


public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    // Other middleware configurations

    app.UseExceptionHandler("/Home/Error");
}

In the above example, any unhandled exceptions will be redirected to the Error action method of the HomeController. You can customize this behavior by a different route or controller action.

Custom Error Pages

ASP.NET Core 6 MVC allows you to create custom error pages to provide a more user-friendly experience when errors occur. To create a custom error page, you can define a view with the appropriate name and it in the Views/Shared folder. For example, to create a custom error page for HTTP 404 errors, you can create a view named Error404.cshtml:


@{
    ViewData["Title"] = "Page Not Found";
}

Page Not Found

The requested page could not be found.

Once you have created the custom error page, you can configure ASP.NET Core 6 MVC to use it by the following code to your Startup.cs file:


public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    // Other middleware configurations

    app.UseStatusCodePagesWithReExecute("/Home/Error{0}");
}

In the above example, the UseStatusCodePagesWithReExecute middleware is used to redirect to the Error action method of the HomeController for any HTTP status code that does not have a corresponding view. The {0} placeholder is used to pass the status code to the action method.

Logging Errors

Logging errors is an essential part of error handling in ASP.NET Core 6 MVC. By logging errors, you can gather valuable about the cause and impact of errors, which can help in troubleshooting and improving the application. ASP.NET Core 6 MVC provides a built-in logging framework that you can leverage to log errors.

To log errors, you can inject an instance of the ILogger interface into your controllers or services and use it to log error messages. Here's an example:

In the above example, the ILogger instance is injected into the HomeController constructor. the Index action method, any exceptions that occur are logged using the LogError method of the . You can customize the log and level based on your requirements.

Conclusion

Handling errors in ASP.NET Core 6 MVC is crucial for delivering a reliable and user-friendly web application. By leveraging the global error handling, custom error pages, and logging capabilities provided by ASP.NET Core 6 MVC, you can effectively handle and manage errors in your application.

Remember to always test your error handling mechanisms thoroughly to ensure they work as expected in different scenarios.

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