Asp.Net Web Api-发布英国日期格式

使用自定义模型绑定器完成此操作,该绑定器与MVC3中的模型绑定器略有不同:

public class DateTimeModelBinder : IModelBinder
    {

        public bool BindModel(HttpActionContext actionContext, ModelBindingContext bindingContext)
        {
            var date = bindingContext.ValueProvider.GetValue(bindingContext.ModelName).AttemptedValue;

            if (String.IsNullOrEmpty(date))
                return false;

            bindingContext.ModelState.SetModelValue(bindingContext.ModelName, bindingContext.ValueProvider.GetValue(bindingContext.ModelName));
            try
            {
                bindingContext.Model = DateTime.Parse(date);
                return true;
            }
            catch (Exception)
            {
                bindingContext.ModelState.AddModelError(bindingContext.ModelName, String.Format("\"{0}\" is invalid.", bindingContext.ModelName));
                return false;
            }
        }
    }

在我的Global.asax.cs文件中,添加此行来告诉api对DateTime值使用此模型绑定器:

GlobalConfiguration.Configuration.BindParameter(typeof(DateTime), new DateTimeModelBinder());

以下是我的api控制器中的方法:

public IList<LeadsLeadRowViewModel> Get([ModelBinder]LeadsIndexViewModel inputModel)

我的LeadsIndexViewModel类有几个DateTime属性,这些属性现在都是有效的英国日期时间。

我也想在全球范围内解决这个问题。。。在这个过程中扯掉了很多头发。事实证明,WebApi中没有扩展点,人们希望在其中截取传入的表单数据并根据需要进行修改。那不是很好吗。因此,由于缺乏这一点,我尽可能深入地研究WebApi源代码,看看我能想出什么。我最终重用了负责解析表单数据的类来创建模型。我只添加了几行,专门处理日期。下面的类可以这样添加到配置中:

  private static void PlaceFormatterThatConvertsAllDatesToIsoFormat(HttpConfiguration config)
  {
             config.Formatters.Remove(
                 config.Formatters.FirstOrDefault(x => x is JQueryMvcFormUrlEncodedFormatter));

             config.Formatters.Add(
                 new IsoDatesJQueryMvcFormUrlEncodedFormatter());
}

格式化程序:

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Net.Http;
using System.Net.Http.Formatting;
using System.Threading.Tasks;
using System.Web.Http.ModelBinding;

namespace WebApi.Should.Allow.You.To.Set.The.Binder.Culture
{
    // This class replaces WebApi's JQueryMvcFormUrlEncodedFormatter 
    // to support JQuery schema on FormURL. The reasong for this is that the 
    // supplied class was unreliable when parsing dates european style.
    // So this is a painful workaround ...
    /// <remarks>
    /// Using this formatter any string that can be parsed as a date will be formatted using ISO format
    /// </remarks>
    public class IsoDatesJQueryMvcFormUrlEncodedFormatter : FormUrlEncodedMediaTypeFormatter
    {

        // we *are* in Israel
        private static readonly CultureInfo israeliCulture = new CultureInfo("he-IL");

        public override bool CanReadType(Type type)
        {
            if (type == null)
            {
                throw new ArgumentNullException("type");
            }
            return true;
        }

        public override Task<object> ReadFromStreamAsync(Type type
            , Stream readStream
            , HttpContent content
            , IFormatterLogger formatterLogger)
        {
            if (type == null)
            {
                throw new ArgumentNullException("type");
            }

            if (readStream == null)
            {
                throw new ArgumentNullException("readStream");
            }

            // For simple types, defer to base class
            if (base.CanReadType(type))
            {
                return base.ReadFromStreamAsync(type, readStream, content, formatterLogger);
            }

            var result = base.ReadFromStreamAsync(
                                typeof(FormDataCollection), 
                                readStream, 
                                content, 
                                formatterLogger);

            Func<object, object> cultureSafeTask = (state) =>
            {
                var innterTask = (Task<object>)state;
                var formDataCollection = (FormDataCollection)innterTask.Result;
                var modifiedCollection = new List<KeyValuePair<string, string>>();

                foreach (var item in formDataCollection)
                {
                    DateTime date;
                    var isDate =
                        DateTime.TryParse(item.Value,
                                            israeliCulture,
                                            DateTimeStyles.AllowWhiteSpaces,
                                            out date);

                    if (true == isDate)
                    {
                        modifiedCollection.Add(
                            new KeyValuePair<string, string>(
                                item.Key,
                                date.ToString("o")));
                    }
                    else
                    {
                        modifiedCollection.Add(
                            new KeyValuePair<string, string>(
                                item.Key,
                                item.Value));
                    }
                }

                formDataCollection = new FormDataCollection(modifiedCollection);

                try
                {
                    return
                        formDataCollection.ReadAs(type, String.Empty, RequiredMemberSelector, formatterLogger);
                }
                catch (Exception e)
                {
                    if (formatterLogger == null)
                    {
                        throw;
                    }

                    formatterLogger.LogError(String.Empty, e);

                    return GetDefaultValueForType(type);
                }
            };

            return
                Task.Factory.StartNew(
                cultureSafeTask
                            , result);
        }
    }
} 

这里有一个将jQuery日期选择器本地化为en-gb的示例: http://weblogs.asp.net/hajan/archive/2010/10/05/integration-of-jquery-datepicker-in-asp-net-website-localization-part-3.aspx

此外,我看到您尝试将区域性设置为en-GB,但我不知道您是否也尝试在Web.Config中设置UI区域性(我不知道这是否会影响MVC中的jQuery捆绑包):

<globalization requestEncoding="utf-8" responseEncoding="utf-8" culture="en-GB" uiCulture="en-GB"/>

…或者,如果这不起作用(呵呵),为什么不将值作为字符串传递,然后在您的api控制器中解析它:

using System.Globalization;

// fetch the en-GB culture
CultureInfo ukCulture = new CultureInfo("en-GB");
// pass the DateTimeFormat information to DateTime.Parse
DateTime myDateTime = DateTime.Parse("StringValue" ,ukCulture.DateTimeFormat);