Change default format for parsing DateTime in ASP.NET Core

Question

I get the date in ASP.NET Core Controller as follows:

public class MyController:Controller{
    public IActionResult Test(DateTime date) {

    }
}

The framework can parse the date, but only in the English format. When I pass December 04, 2017 as a date parameter, I mean December 4, 2017. This will be treated as an English date, so my date object gets the value on April 12, 2017. I tried to add German only using this article, as well as this one , but to no avail.

What needs to be done so that ASP.NET Core automatically parses dates in the correct German format?

Update I tried to set RequestLocalizationOptions

services.Configure<RequestLocalizationOptions>(opts =>
{
    var supportedCultures = new[]
    {
        new CultureInfo("de-DE"),
    };

    opts.DefaultRequestCulture = new RequestCulture("de-DE");
    // Formatting numbers, dates, etc.
    opts.SupportedCultures = supportedCultures;
    // UI strings that we have localized.
    opts.SupportedUICultures = supportedCultures;
});

. example.com/Test?date=12.04.2017 :

public IActionResult Test(DateTime date) {
    string dateString = date.ToString("d"); // 04.12.2016
    string currentDateString = DateTime.Now.ToString("d"); // 14.01.2016
    return Ok();
}

Answer 1

. DateTime ( Json- ), DateTime .

" ", , .

, DateTime , IModelBinder: https://docs.microsoft.com/en-us/aspnet/core/mvc/advanced/custom-model-binding

:

1) ( # 7 "out"):

public class DateTimeModelBinder : IModelBinder
{
    public Task BindModelAsync(ModelBindingContext bindingContext)
    {
        if (bindingContext == null)
            throw new ArgumentNullException(nameof(bindingContext));

        // Try to fetch the value of the argument by name
        var modelName = bindingContext.ModelName;
        var valueProviderResult = bindingContext.ValueProvider.GetValue(modelName);
        if (valueProviderResult == ValueProviderResult.None)
            return Task.CompletedTask;

        bindingContext.ModelState.SetModelValue(modelName, valueProviderResult);

        var dateStr = valueProviderResult.FirstValue;
        // Here you define your custom parsing logic, i.e. using "de-DE" culture
        if (!DateTime.TryParse(dateStr, new CultureInfo("de-DE"), DateTimeStyles.None, out DateTime date))
        {
            bindingContext.ModelState.TryAddModelError(bindingContext.ModelName, "DateTime should be in format 'dd.MM.yyyy HH:mm:ss'");
            return Task.CompletedTask;
        }

        bindingContext.Result = ModelBindingResult.Success(date);
        return Task.CompletedTask;
    }
}

2) :

 public class DateTimeModelBinderProvider : IModelBinderProvider
{
    public IModelBinder GetBinder(ModelBinderProviderContext context)
    {
        if (context == null)
        {
            throw new ArgumentNullException(nameof(context));
        }

        if (context.Metadata.ModelType == typeof(DateTime) || 
            context.Metadata.ModelType == typeof(DateTime?))
        {
            return new DateTimeModelBinder();
        }

        return null;
    }
}

3) , , , ASP.NET Core:

services.AddMvc(options =>
{
    options.ModelBinderProviders.Insert(0, new DateTimeModelBinderProvider());
});

DateTime , .

Answer 2

, ConfigureServices:

services.AddMvc()
.AddJsonOptions(options =>
{
    options.SerializerSettings.DateFormatString = "mm/dd/yy, dddd";
});

, .

Answer 3

MVC InvariantCulture (, URL-). , URL- . URL- .

ValueProviderFactories , ( method="POST" )

public class CustomValueProviderFactory : IValueProviderFactory
{
    public Task CreateValueProviderAsync(ValueProviderFactoryContext context)
    {
        if (context == null)
        {
            throw new ArgumentNullException(nameof(context));
        }

        var query = context.ActionContext.HttpContext.Request.Query;
        if (query != null && query.Count > 0)
        {
            var valueProvider = new QueryStringValueProvider(
                BindingSource.Query,
                query,
                CultureInfo.CurrentCulture);

            context.ValueProviders.Add(valueProvider);
        }

        return Task.CompletedTask;
    }
}

services.AddMvc(opts => {
    // 2 - Index QueryStringValueProviderFactory
    opts.ValueProviderFactories[2] = new CustomValueProviderFactory(); 
})

PS , , .

Answer 4

TypeConverter ():

using System;
using System.ComponentModel;
using System.Globalization;
using System.Drawing;

public class DeDateTimeConverter : TypeConverter {
   // Overrides the CanConvertFrom method of TypeConverter.
   // The ITypeDescriptorContext interface provides the context for the
   // conversion. Typically, this interface is used at design time to 
   // provide information about the design-time container.
   public override bool CanConvertFrom(ITypeDescriptorContext context, 
      Type sourceType) {

      if (sourceType == typeof(string)) {
         return true;
      }
      return base.CanConvertFrom(context, sourceType);
   }
   // Overrides the ConvertFrom method of TypeConverter.
   public override object ConvertFrom(ITypeDescriptorContext context, 
      CultureInfo culture, object value) {
      if (value is string) {
         if (DateTime.TryParse(((string)value), new CultureInfo("de-DE") /*or use culture*/, DateTimeStyles.None, out DateTime date))
             return date;
      }
      return base.ConvertFrom(context, culture, value);
   }
}

TypeConverter :

[TypeConverter(typeof(DeDateTimeConverter))]
public DateTime CustomDateTime { get; set; }

@ , TypeConverter , TypeConverter Startup.cs:

TypeDescriptor.AddAttributes(typeof(DateTime), new TypeConverterAttribute(typeof(DeDateTimeConverter)));

Answer 5

ISO: "--"

https://www.w3schools.com/js/js_date_formats.asp

.

, :

const dateStart = new Date();
$.post("localhost:4200/start", { dateStart: dateStart.toISOString() },
    function(data) {
        console.log("Started!");
    });

Answer 6

web.config

<configuration>
   <system.web>    
      <globalization culture="de-DE" uiCulture="de-DE"/>
   </system.web>
</configuration>

EDIT: , Core, StartUp.Configure:

var cultureInfo = new CultureInfo("de-DE");
CultureInfo.DefaultThreadCurrentCulture = cultureInfo;
CultureInfo.DefaultThreadCurrentUICulture = cultureInfo;

Answer 7

              using System;
        using System.Collections.Generic;
        using System.Linq;
        using System.Threading.Tasks;
        using Microsoft.AspNetCore.Builder;
        using Microsoft.AspNetCore.Hosting;
        using Microsoft.Extensions.Configuration;
        using Microsoft.Extensions.DependencyInjection;
        using Microsoft.Extensions.Logging;
        using Microsoft.Extensions.Options;
        using System.Globalization;
        using Microsoft.AspNetCore.Localization;

        namespace coreweb
        {
            public class Startup
            {
                public Startup(IHostingEnvironment env)
                {
                    var builder = new ConfigurationBuilder()
                        .SetBasePath(env.ContentRootPath)
                        .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
                        .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
                        .AddEnvironmentVariables();

                    if (env.IsDevelopment())
                    {
                        // This will push telemetry data through Application Insights pipeline faster, allowing you to view results immediately.
                        builder.AddApplicationInsightsSettings(developerMode: true);
                    }
                    Configuration = builder.Build();
                }

                public IConfigurationRoot Configuration { get; }

                // This method gets called by the runtime. Use this method to add services to the container.
                public void ConfigureServices(IServiceCollection services)
                {
                    // ... previous configuration not shown
                    services.AddMvc();
                    services.Configure<RequestLocalizationOptions>(
                        opts =>
                        {
                            var supportedCultures = new[]
                            {

                        new CultureInfo("de-DE"),
                            };

                            opts.DefaultRequestCulture = new RequestCulture("de-DE");
                    // Formatting numbers, dates, etc.
                    opts.SupportedCultures = supportedCultures;
                    // UI strings that we have localized.
                    opts.SupportedUICultures = supportedCultures;
                        });
                }

                // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
                public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
                {
                    loggerFactory.AddConsole(Configuration.GetSection("Logging"));
                    loggerFactory.AddDebug();

                 //   app.UseApplicationInsightsRequestTelemetry();

                    if (env.IsDevelopment())
                    {
                        app.UseDeveloperExceptionPage();
                        app.UseBrowserLink();
                    }
                    else
                    {
                        app.UseExceptionHandler("/Home/Error");
                    }

                  //  app.UseApplicationInsightsExceptionTelemetry();

                    app.UseStaticFiles();

                    var options = app.ApplicationServices.GetService<IOptions<RequestLocalizationOptions>>();
                    app.UseRequestLocalization(options.Value);



                    app.UseMvc(routes =>
                    {
                        routes.MapRoute(
                            name: "default",
                            template: "{controller=Home}/{action=Index}/{id?}");
                    });
                }
            }
        }

Answer 8

StatusCode , - :

internal IActionResult CreateResponse(int code, object content = null)
    {
        Type t = content?.GetType();
        bool textContent = t == typeof(string) || t == typeof(bool);
        //
        JsonSerializerSettings dateFormatSettings = new JsonSerializerSettings
        {

            DateFormatString = myDateFormat
        };

        string bodyContent = content == null || string.IsNullOrWhiteSpace(content + "")
                    ? null
                    : textContent
                        ? content + ""
                        : JsonConvert.SerializeObject(content, dateFormatSettings);

        ObjectResult or = base.StatusCode(code, bodyContent);
        string mediaType = 
                    !textContent
                        ? "application/json"
                        : "text/plain";
        or.ContentTypes.Add(new MediaTypeHeaderValue(mediaType));
        return or;
    }

:

return base.CreateResponse(StatusCodes.Status200OK, new { name = "My Name", age = 23});

, Ok, BadRequest .., , , - . = 200, - GET. , , , , Type.GetTypeInfo(). IsPrimitive , , DateTime, TimeSpan, DateTimeOffset, Guid.

Answer 9

, . . :

:

string data1 
string horainicio 
string horafim

var ageData = new AgendaData();
var user = await _userManager.GetUserAsync(User);
string usuario = user.Id;
int empresa = user.IdEmpresa;
int Idprospect = Convert.ToInt32(prospect);
int minutos = 0;           
var tipoAgenda = TipoAgenda.Contato;

var provider = CultureInfo.InvariantCulture;
provider = new CultureInfo("en-US");            
string formato = "dd/MM/yyyy HH:mm";

var dataInicio = DateTime.ParseExact(data1 + " " + horainicio, formato, provider);
var dataFim = DateTime.ParseExact(data1 + " " + horafim, formato, provider);           
var dataAlerta = dataInicio.AddMinutes(-minutos);

, , . , configure startup.cs.

startup.cs

 public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, CRMContext context)
        {
            loggerFactory.AddConsole(Configuration.GetSection("Logging"));
            loggerFactory.AddDebug();

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseDatabaseErrorPage();
                app.UseBrowserLink();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }

            //Fixar Cultura para en-US
            RequestLocalizationOptions localizationOptions = new RequestLocalizationOptions
            {
                SupportedCultures = new List<CultureInfo> { new CultureInfo("en-US") },
                SupportedUICultures = new List<CultureInfo> { new CultureInfo("en-US") },
                DefaultRequestCulture = new RequestCulture("en-US")
            };

            app.UseRequestLocalization(localizationOptions);      
            app.UseStaticFiles();
            app.UseIdentity();

            // Add external authentication middleware below. To configure them please see https://go.microsoft.com/fwlink/?LinkID=532715

            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });

            context.Database.EnsureCreated();
        }

, .

Answer 10

DateTime dt = DateTime.ParseExact(dateString, "ddMMyyyy", CultureInfo.InvariantCulture);
dt.ToString("yyyyMMdd");

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