2013-12-05 15:17 山不转水转... 阅读(599) 评论() 收藏 举报
http://stackoverflow.com/questions/3260748/default-resource-for-data-annotations-in-asp-net-mvc
Add this class somewhere in your project:
public class ExternalResourceDataAnnotationsValidator : DataAnnotationsModelValidator<ValidationAttribute>
{
/// <summary>
/// The type of the resource which holds the error messqages
/// </summary>
public static Type ResourceType { get; set; }
/// <summary>
/// Function to get the ErrorMessageResourceName from the Attribute
/// </summary>
public static Func<ValidationAttribute, string> ResourceNameFunc
{
get { return _resourceNameFunc; }
set { _resourceNameFunc = value; }
}
private static Func<ValidationAttribute, string> _resourceNameFunc = attr => attr.GetType().Name;
public ExternalResourceDataAnnotationsValidator(ModelMetadata metadata, ControllerContext context, ValidationAttribute attribute)
: base(metadata, context, attribute)
{
if (Attribute.ErrorMessageResourceType == null)
{
this.Attribute.ErrorMessageResourceType = ResourceType;
}
if (Attribute.ErrorMessageResourceName == null)
{
this.Attribute.ErrorMessageResourceName = ResourceNameFunc(this.Attribute);
}
}
}
and in your global.asax, add the following:
// Add once ExternalResourceDataAnnotationsValidator.ResourceType = typeof(CustomDataAnnotationsResources); // Add one line for every attribute you want their ErrorMessageResourceType replaced. DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(RangeAttribute), typeof(ExternalResourceDataAnnotationsValidator));
It will look for a property with the same name as the validator type for the error message. You can change that via the ResourceNameFunc property.
EDIT: AFAIK this works from MVC2 onwards, as DataAnnotationsModelValidatorProvider was introduced in MVC2.
To achieve this, I created a new class that inherits from RequiredAttribute, and the error message is embedded inside this new class:
The error message is taken from the ValidationResource.resx file, where I list the error message as follows:
public class RequiredWithMessageAttribute : RequiredAttribute
{
public RequiredWithMessageAttribute()
{
ErrorMessageResourceType = typeof(ValidationResource);
ErrorMessageResourceName = "RequiredErrorMessage";
}
}
RequiredErrorMessage --> "{0} is required."
where {0} = display name.
I then annotate my models like this, so I never have to repeat my error message declarations:
[RequiredWithMessage]
public string Name { get; set; }
Once you do this, an error message ("Name is required.") will appear whenever validation fails.
This works properly with ASP.NET MVC's server-side validation and client-side validation.
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