ASP.NET MVC2 Model Validation Fails with Non-US Date Format
I have a small MVC2 app that displays in two cultures: en-US and es-MX. One portion contains a user input for a date that is pre-populated with the current date in the Model.
When using en-US, the date field is displayed as MM/dd/yyyy and can be changed using the same format without causing any validation errors.
When using es-MX, the date field is displayed as dd/MM/yyyy, but when the date is edited in this format, the server-side validation fails with the message:
The value '17/05/1991' is not valid for The Date.
One of the first things that jumps out at me about that message is th开发者_开发技巧at it is not localized. Both the message itself (which I do not think I can control) and the Display Name of the field (which I can control and is localized in my code). Should be displaying in a localized format.
I have tried stepping through the code to see exactly where the validation is failing, but it seems to be happening inside some of the compiled MVC or DataAnnotations code that I cannot see.
Application details: IIS6, ASP.NET 3.5 (C#), MVC 2 RTM
Sample Model Code:
public class TestVieModel{
[LocalizedDisplayNameDisplayName("TheDateDisplayName", NameResourceType=typeof(Resources.Model.TestViewModel))]
[Required(ErrorMessageResourceName="TheDateValidationMessageRequired", ErrorMessageResourceType=typeof(Resources.Model.TestViewModel))]
[DataType(DataType.Date)]
public DateTime TheDate { get; set; }
}
Sample Controller Action Code:
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Save(TestViewModel model) {
if(ModelState.IsValid) { // <--- Always is false when using es-MX and a date foramtted as dd/MM/yyyy.
// Do other stuff
return this.View("Complete", model);
}
// Validation failed, redisplay the form.
return this.View("Enter", model);
}
Sample View Code:
<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<HispanicSweeps.Web.Model.LosMets.EnterViewModel>" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Test</title>
</head>
<body>
<% using (Html.BeginForm()) {%>
<%= Html.ValidationSummary(true) %>
<fieldset>
<legend>Fields</legend>
<div class="editor-label">
<%= Html.LabelFor(model => model.TheDate) %>
</div>
<div class="editor-field">
<%= Html.EditorFor(model => model.TheDate) %>
<%= Html.ValidationMessageFor(model => model.TheDate) %>
</div>
<p><input type="submit" value="Save" /></p>
</fieldset>
<% } %>
</body>
</html>
Here's how I solved the issue in my case. I manually validated the date in the controller and reset the ModelState for that property:
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Save(TestViewModel model) {
var tempDate = new DateTime();
var culture = CultureInfo.CurrentUICulture;
if(DateTime.TryParse(Request.Form["TheDate"], culture, DateTimeStyles.None, out tempDate)) {
model.DateOfBirth = tempDate;
ModelState.Remove("TheDate");
}
if(ModelState.IsValid) { // <--- Now valid
// Do other stuff
return this.View("Complete", model);
}
// Validation failed, redisplay the form.
return this.View("Enter", model);
}
The validation occurs within the DataAnnotations class. You can subclass DataAnnotations classes for your own purposes.
I would create a new MultiCultureDateType DataAnnotations class that will validate dates across multiple cultures.
More information: http://haacked.com/archive/2009/11/19/aspnetmvc2-custom-validation.aspx
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