MVC globalization: need global filter before model binding

MVC globalization: need global filter before model binding

In ASP.NET MVC, you can apply a global filter before model binding by using the OnActionExecuting method of a custom ActionFilterAttribute. This filter will be executed before any action method is called, allowing you to perform tasks such as globalizations, logging, or any other pre-processing tasks before the model binding process takes place.

Here's how you can create a global filter for globalization before model binding:

  • Create a custom ActionFilterAttribute that overrides the OnActionExecuting method:
using System.Globalization;
using System.Threading;
using System.Web.Mvc;

public class GlobalizationFilter : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        // Implement your globalization logic here
        // For example, set the culture based on user preferences or browser settings
        // You can also set Thread.CurrentThread.CurrentCulture and Thread.CurrentThread.CurrentUICulture

        // For demonstration purposes, let's set the culture to en-US
        CultureInfo cultureInfo = new CultureInfo("en-US");
        Thread.CurrentThread.CurrentCulture = cultureInfo;
        Thread.CurrentThread.CurrentUICulture = cultureInfo;
        
        base.OnActionExecuting(filterContext);
    }
}
  • Register the global filter in the FilterConfig.cs file located in the App_Start folder:
using System.Web.Mvc;

public class FilterConfig
{
    public static void RegisterGlobalFilters(GlobalFilterCollection filters)
    {
        filters.Add(new GlobalizationFilter());
        // Other global filters can also be added here if needed
    }
}
  • In the Global.asax.cs file, call the FilterConfig.RegisterGlobalFilters method in the Application_Start method:
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;

public class MvcApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);
    }
}

By following these steps, the GlobalizationFilter will be executed before any action method is called, allowing you to set the culture or perform other globalization tasks. The model binding process will then take place using the specified culture settings.

Please note that in a real-world scenario, you might determine the culture based on user preferences, browser settings, or other factors specific to your application. The example above demonstrates how to set a specific culture for demonstration purposes.

Examples

  1. "MVC Globalization: Applying Culture Filter Before Model Binding"

    Description: Explore how to implement a global filter in MVC that sets the culture based on user preferences before model binding, ensuring proper globalization for the entire application.

    Code:

    // Global Filter to Set Culture Before Model Binding
public class CultureFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        var culture = // Retrieve user's preferred culture
        CultureInfo.CurrentCulture = new CultureInfo(culture);
        CultureInfo.CurrentUICulture = new CultureInfo(culture);
    }
}

  2. "ASP.NET MVC Globalization Filter Order"

    Description: Understand the order of execution for global filters in MVC to ensure that the globalization filter is applied before model binding.

    Code:

    // Specify Filter Order in Global.asax.cs
protected void Application_Start()
{
    GlobalFilters.Filters.Add(new CultureFilterAttribute(), 0);
}

  3. "MVC Globalization: Model Binder Culture Awareness"

    Description: Implement a custom model binder in MVC that is aware of the current culture, ensuring proper data conversion during model binding based on the selected culture.

    Code:

    // Custom Model Binder with Culture Awareness
public class CultureAwareModelBinder : DefaultModelBinder
{
    protected override void SetProperty(ControllerContext controllerContext, ModelBindingContext bindingContext, PropertyDescriptor propertyDescriptor, object value)
    {
        // Implement culture-aware property setting logic
        // ...
    }
}

  4. "MVC Globalization: Set Culture in BaseController"

    Description: Learn how to set the culture at the BaseController level to ensure it is applied globally before any specific controller actions are executed.

    Code:

    // BaseController with Culture Setting
public class BaseController : Controller
{
    protected override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        var culture = // Retrieve user's preferred culture
        CultureInfo.CurrentCulture = new CultureInfo(culture);
        CultureInfo.CurrentUICulture = new CultureInfo(culture);
        base.OnActionExecuting(filterContext);
    }
}

  5. "ASP.NET MVC Globalization: Culture in URL Routing"

    Description: Explore how to incorporate the culture in URL routing in MVC, ensuring that the selected culture is included in the URL and applied globally.

    Code:

    // URL Routing with Culture Parameter
routes.MapRoute(
    name: "Localized",
    url: "{culture}/{controller}/{action}/{id}",
    // ...
);

  6. "MVC Globalization: UseCultureAwareValueProviderFactory"

    Description: Implement a custom ValueProviderFactory in MVC that is culture-aware, ensuring that values from the request are interpreted correctly based on the selected culture.

    Code:

    // Culture-Aware ValueProviderFactory
ValueProviderFactories.Factories.Insert(0, new CultureAwareValueProviderFactory());

  7. "MVC Globalization: Set Culture in BeginRequest"

    Description: Explore setting the culture in the BeginRequest event in MVC to ensure that it is applied at the earliest stage of the request lifecycle.

    Code:

    // Set Culture in Global.asax.cs BeginRequest
protected void Application_BeginRequest()
{
    var culture = // Retrieve user's preferred culture
    CultureInfo.CurrentCulture = new CultureInfo(culture);
    CultureInfo.CurrentUICulture = new CultureInfo(culture);
}

  8. "MVC Globalization: Culture-Aware Model Validation"

    Description: Implement culture-aware model validation in MVC, ensuring that validation messages and rules are applied based on the selected culture.

    Code:

    // Culture-Aware Model Validation Attribute
public class CultureAwareRangeAttribute : RangeAttribute
{
    // Implement culture-aware validation logic
    // ...
}

  9. "ASP.NET MVC Globalization: ApplyCultureFilterAttribute Attribute"

    Description: Create a custom attribute, ApplyCultureFilterAttribute, that can be applied to specific controllers or actions to enforce culture filtering before model binding.

    Code:

    // ApplyCultureFilterAttribute for Specific Controllers/Actions
[ApplyCultureFilter]
public class MyController : Controller
{
    // ...
}

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