我在 ASP.NET Core 控制器中得到一个日期，如下所示：
public class MyController:Controller{
public IActionResult Test(DateTime date) {
}
}
该框架能够解析日期，但仅限英文格式。当我传递 04.12.2017 作为日期参数时，我的意思是 2017 年 12 月 4 日。这将被解析为英语日期，因此我的日期对象获取值 2017 年 4 月 12 日。我尝试仅使用 this 文章添加德语还有this，但没有成功。
需要做什么才能让 ASP.NET Core 自动解析正确的德语格式的日期？
更新 我尝试设置 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;
});
仍然无法工作。我致电 example.com/Test?date=12.04.2017 并在我的调试器中得到了这个：
public IActionResult Test(DateTime date) {
string dateString = date.ToString("d"); // 04.12.2016
string currentDateString = DateTime.Now.ToString("d"); // 14.01.2016
return Ok();
}
有同样的问题。虽然在请求正文中传递 DateTime 工作正常（因为 Json 转换器处理此人员），但在查询字符串中作为参数传递 DateTime 存在一些文化问题。
我不喜欢“更改所有请求文化”的方法，因为这可能会影响其他类型的解析，这是不可取的。
所以我的选择是使用 IModelBinder 覆盖默认的 DateTime 模型绑定：https://learn.microsoft.com/en-us/aspnet/core/mvc/advanced/custom-model-binding
我做了什么：
1) 定义自定义绑定器（使用“out”参数的 c# 7 语法）：
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）为您的活页夹定义提供程序：
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) 最后，注册您的提供程序以供 ASP.NET Core 使用：
services.AddMvc(options =>
{
options.ModelBinderProviders.Insert(0, new DateTimeModelBinderProvider());
});
现在您的 DateTime 将按预期进行解析。
考虑为您的日期时间使用自定义
TypeConverterusing 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);
}
}
并在您的财产上使用
TypeConverter[TypeConverter(typeof(DeDateTimeConverter))]
public DateTime CustomDateTime { get; set; }
更新
根据我的经验并感谢这个答案和@zdeněk评论，TypeConverter属性不起作用，您应该在
Startup.csTypeDescriptor.AddAttributes(typeof(DateTime), new TypeConverterAttribute(typeof(DeDateTimeConverter)));
我想格式化我的回复中的日期，我在ConfigureServices方法中执行了以下操作：
services.AddMvc()
.AddJsonOptions(options =>
{
options.SerializerSettings.DateFormatString = "mm/dd/yy, dddd";
});
希望有帮助。
尝试在您的
web.config<configuration>
<system.web>
<globalization culture="de-DE" uiCulture="de-DE"/>
</system.web>
</configuration>
编辑：因为我刚刚意识到这是核心，所以你可以在 StartUp.Configure 中这样做：
var cultureInfo = new CultureInfo("de-DE");
CultureInfo.DefaultThreadCurrentCulture = cultureInfo;
CultureInfo.DefaultThreadCurrentUICulture = cultureInfo;
MVC 始终使用
InvariantCulture您可以将查询和路由 ValueProviderFactories 替换为您自己的尊重当前文化的查询和路由（或在表单中使用
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();
})
附注这是合理的行为，但我不明白为什么文档没有涵盖这个非常重要的事情。
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?}");
});
}
}
}
如果您不介意使用通用 StatusCode 方法进行此调用，您可以执行如下操作：
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;
}
您可以将其添加到基类中并像这样调用它：
return base.CreateResponse(StatusCodes.Status200OK, new { name = "My Name", age = 23});
如果您想创建自己的 Ok、BadRequest 等方法，这取决于您，但对我来说这很有效，我希望它对其他人有帮助。如果您的大多数请求都是 GET，您甚至可以默认 int code = 200。此代码假设您想要使用字符串、布尔值或自定义对象进行响应，但您可以通过检查 Type.GetTypeInfo().IsPrimitive 甚至对小数、字符串、DateTime、TimeSpan、DateTimeOffset 进行一些检查来轻松处理所有基元，或指导。
我也遇到了同样的问题，几乎要生气了。我尝试了一切但没有成功。首先，我找到了解决部分问题的解决方法：
解决方法：
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);
但是，这样我就必须为我的所有日期时间设置不变文化。我找到了在startup.cs的配置中设置文化的解决方案。
在startup.cs上设置文化
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();
}
希望这对您有帮助。
尝试以下更改
public class DateTimeConverter : JsonConverter<DateTime>
{
public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
Debug.Assert(typeToConvert == typeof(DateTime));
return DateTime.ParseExact(reader.GetString(), "yyyy-MM-dd HH:mm:ss", new CultureInfo("de-DE"));
}
public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
{
writer.WriteStringValue(value.ToUniversalTime().ToString("yyyy-MM-dd HH:mm:ss"));
}
}
和
builder.Services.AddMvc().AddJsonOptions(options =>
{
options.JsonSerializerOptions.Converters.Add(new DateTimeConverter());
});
}
希望这会有所帮助。
最好以 ISO 格式将日期从前端发送到控制器：“yyyy-MM-dd”
https://www.w3schools.com/js/js_date_formats.asp
任何文化的任何服务器端都会正确理解此日期格式。
所以，我使用这样的发送方式：
const dateStart = new Date();
$.post("localhost:4200/start", { dateStart: dateStart.toISOString() },
function(data) {
console.log("Started!");
});
DateTime dt = DateTime.ParseExact(dateString, "ddMMyyyy", CultureInfo.InvariantCulture);
dt.ToString("yyyyMMdd");