In ASP.NET MVC, areas provide a way to logically partition a large web application into smaller modules or sub-applications. Each area can have its own controllers, views, and other components. When it comes to error handling in areas, you can use similar techniques as you would in the main application, but with some considerations specific to areas.

Here's how you can handle errors in areas in ASP.NET MVC:

  1. Global Error Handling: Implement global error handling in the main Global.asax.cs file. This approach applies to the entire application, including all areas. You can use the Application_Error event to handle unhandled exceptions and log errors.

    csharp
    protected void Application_Error(object sender, EventArgs e) { // Log the error Exception exception = Server.GetLastError(); // Log the exception using your preferred logging mechanism // Redirect to the error page Response.Clear(); Server.ClearError(); Response.Redirect("~/Error/Index"); // Assuming you have an ErrorController in the main application }
  2. Area-Specific Error Handling: If you want to handle errors specifically for an area, you can create a custom base controller for the area and override the OnException method to handle exceptions. This approach allows you to have area-specific error handling logic.

    csharp
    // Custom base controller for the area public class AreaBaseController : Controller { protected override void OnException(ExceptionContext filterContext) { // Log the error Exception exception = filterContext.Exception; // Log the exception using your preferred logging mechanism // Redirect to the area-specific error page filterContext.ExceptionHandled = true; filterContext.Result = RedirectToAction("Index", "Error", new { area = "YourAreaName" }); } }

    Then, make sure your area controllers inherit from this custom base controller:

    csharp
    // Your area-specific controller public class HomeController : AreaBaseController { // Controller actions and logic go here }

    With this setup, whenever an unhandled exception occurs in the area, the OnException method in the area's base controller will be triggered, allowing you to handle the error in an area-specific manner.

  3. Error Views: Create a custom error controller and views for your main application and each area. You can have an ErrorController in the main application, and if needed, create separate error controllers in each area.

    csharp
    // Main application's ErrorController public class ErrorController : Controller { public ActionResult Index() { return View(); } }

    In each area, you can have an ErrorController with an Index action. Customize the error views for each area based on your needs.

  4. Error Routing: To route to the correct error views, you need to register custom error routes for each area in your AreaRegistration.cs files.

    csharp
    public class YourAreaNameAreaRegistration : AreaRegistration { public override void RegisterArea(AreaRegistrationContext context) { // Register area-specific routes here // Custom error route for the area context.MapRoute( "YourAreaName_Error", "YourAreaName/Error/{action}", new { controller = "Error", action = "Index" } ); } }

By combining these approaches, you can implement error handling for areas in your ASP.NET MVC application. Remember to adjust the error handling approach based on your specific requirements and application architecture.

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