ASP.NET MVC3 - DateTime format

问题:

I\'m using ASP.NET MVC 3.
My ViewModel looks like this:

public class Foo
{
    [DataType(DataType.Date)]
    [DisplayFormat(DataFormatString = \"{0:dd.MM.yyyy}\", ApplyFormatInEditMode = true)]
    public DateTime StartDate { get; set; }
    ...
}

In view, I have something like this:

<div class=\"editor-field\">
    @Html.EditorFor(model => model.StartDate)
    <br />
    @Html.ValidationMessageFor(model => model.StartDate)
</div>

StartDate is displayed in correct format, but when I change it\'s value to 19.11.2011 and submit the form, I get the following error message: \"The value \'19.11.2011\' is not valid for StartDate.\"

Any help would be greatly appreciated!

回答1:

You need to set the proper culture in the globalization element of your web.config file for which dd.MM.yyyy is a valid datetime format:

<globalization culture=\"....\" uiCulture=\"....\" />

For example that\'s the default format in german: de-DE.

---

UPDATE:

According to your requirement in the comments section you want to keep en-US culture of the application but still use a different formats for the dates. This could be achieved by writing a custom model binder:

using System.Web.Mvc;
public class MyDateTimeModelBinder : DefaultModelBinder
{
    public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        var displayFormat = bindingContext.ModelMetadata.DisplayFormatString;
        var value = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);

        if (!string.IsNullOrEmpty(displayFormat) && value != null)
        {
            DateTime date;
            displayFormat = displayFormat.Replace(\"{0:\", string.Empty).Replace(\"}\", string.Empty);
            // use the format specified in the DisplayFormat attribute to parse the date
            if (DateTime.TryParseExact(value.AttemptedValue, displayFormat, CultureInfo.InvariantCulture, DateTimeStyles.None, out date))
            {
                return date;
            }
            else
            {
                bindingContext.ModelState.AddModelError(
                    bindingContext.ModelName, 
                    string.Format(\"{0} is an invalid date format\", value.AttemptedValue)
                );
            }
        }

        return base.BindModel(controllerContext, bindingContext);
    }
}

which you will register in Application_Start:

ModelBinders.Binders.Add(typeof(DateTime), new MyDateTimeModelBinder());

回答2:

Based upon your comment I see all you want is an english current but with a different date format (Correct me if I\'m wrong).

The fact is the DefaultModelBinder uses the culture settings of the server for form data. So I can say the server use \"en-US\" culture but with a different date format.

You can do something like this in the Application_BeginRequest and you are done!

protected void Application_BeginRequest()
{
    CultureInfo info = new CultureInfo(System.Threading.Thread.CurrentThread.CurrentCulture.ToString());
    info.DateTimeFormat.ShortDatePattern = \"dd.MM.yyyy\";
    System.Threading.Thread.CurrentThread.CurrentCulture = info;
}

Web.Config

<globalization culture=\"en-US\" />

回答3:

Added this below code to global.asax.cs file

protected void Application_BeginRequest()  
{        
    CultureInfo info = new CultureInfo(System.Threading.Thread.CurrentThread.CurrentCulture.ToString());     
    info.DateTimeFormat.ShortDatePattern = \"dd.MM.yyyy\";
    System.Threading.Thread.CurrentThread.CurrentCulture = info;     
}

And added the below to web.config under <system.web>

<globalization culture=\"en-US\">;