How to set globalization?

问题

I'm stuck in an ASP.NET Web API Globalization problem. I want to get date time in culture specific format when I invoke a Web API. Please provide some insights.

In my solution, first, there is one delegating handler, whose job is to set the culture. It is defined as follows:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;
using System.Web;

namespace CultureHandling.Handlers
{
     public class CultureHandler : DelegatingHandler
     {
          protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, 
               CancellationToken cancellationToken)
          {
                  if (request != null && request.Headers != null && request.Headers.Count() > 0)
                  {
                        var reqHdrs = request.Headers.AcceptLanguage;
                        var headerValue = reqHdrs.OrderByDescending(e => e.Quality ?? 1.0D)
                                .Where(e => !e.Quality.HasValue || e.Quality.Value > 0.0D)
                                .First();


                       System.Threading.Thread.CurrentThread.CurrentUICulture = 
                       System.Globalization.CultureInfo.GetCultureInfo(headerValue.Value.ToString());
                       System.Threading.Thread.CurrentThread.CurrentCulture = 
                       System.Globalization.CultureInfo.GetCultureInfo(headerValue.Value.ToString());
                    }
                    return base.SendAsync(request, cancellationToken);
                 }
             }
        }
   }

Then, I have a date time converter defined as:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;

namespace CultureHandling.Converters
{
    public class CustomDateTimeConverter : DateTimeConverterBase
    {
        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        {
            return (DateTime.Parse(reader.Value.ToString()));
        }

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        {
            writer.WriteValue(((DateTime)value).ToString());
        }
    }
}

The very simple model class is:

public class Employee
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public DateTime Doj { get; set; }
    }

And the corresponding controller action is:

    public class EmployeeController : ApiController
    {
        private readonly List<Employee> employees = null;
        public EmployeeController()
        {
            employees = new List<Employee>();
            employees.Add(new Employee { Id = 1, Name = "Employee1", Doj = new DateTime(2014, 7, 1)});
            employees.Add(new Employee { Id = 2, Name = "Employee2", Doj = new DateTime(2015, 7, 1)});
        }

        public List<Employee> Get()
        {
            return employees;
        }
    }

I've configured the WebApiConfig.cs as:

config.MapHttpAttributeRoutes();
config.MessageHandlers.Add(new CultureHandler());
config.Formatters.JsonFormatter.SerializerSettings.Converters.Add(new CustomDateTimeConverter());

Now, the problem part: Ideally if I invoke the API with Accept Language as en-US, it should return date time value is MM/dd/yyyy format and for fr-FR, the format is dd/MM/yyyy. But, for both of these cases, I'm getting value in MM/dd/yyyy format.

As per investigation, I found the CultureHandler to be working as expected, here is a screenshot of Postman:

The break-point in CultureHandler.cs:

But, surprisingly, during model binding, I'm seeing the culture to be changed to en-US:

I believe this is the reason why I'm not getting date time value in dd/MM/yyyy format when culture is fr-FR:

So, my question is why and where does this culture getting changed? Am I making any mistake in coding? Thanks in advance!

回答1:

I create a new empty project then i wrote all shared code in my solution. Your code is work true. Screenshots is below

I tried with postman.

来源：https://stackoverflow.com/questions/60648268/how-to-set-globalization

标签

asp.net-web-api

globalization