blocks|key|1648877|text|如果要更改完整文本，应使用资源文件对其进行本地化。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1648878|每个ValidationAttribute都有ErrorMessageResourceType和ErrorMessageResourceName的属性(请参阅源here)。|offset|length|style|CODE|1648879|[Required(ErrorMessageResourceName+=+"BoxLengthRequired",+ErrorMessageResourceType+=+typeof(SharedResource))]|code-block|syntax|javascript|1648880|更新|1648881|好吧，似乎有一种方法可以使用本地化提供程序来本地化它，但它仍然有点老套，并且至少需要在属性上有一个属性(来自this+blog+post+-+Word+of+warning，它最初是针对旧的RC1或RC2版本的。它应该可以工作，但文章中一些API可能无法工作)：|1648882|在启动时：|1648883|services.AddMvc()
+++.AddViewLocalization()
+++.AddDataAnnotationsLocalization();|1648884|在您的模型上：|1648885|[Required(ErrorMessage+=+"ViewModelPropertyRequired"),+MinLength(10,+ErrorMessage+=+"ViewModelMinLength")]
public+string+RequiredProperty+{+get;+set;+}|1648886|并实现/使用使用DB的本地化提供程序(即https://github.com/damienbod/AspNet5Localization)。|1648887|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/dotnet/corefx/blob/v1.1.0/src/System.ComponentModel.Annotations/src/System/ComponentModel/DataAnnotations/ValidationAttribute.cs#L161-L198|1|https://damienbod.com/2015/10/24/using-dataannotations-and-localization-in-asp-net-5-mvc-6/|2|https://github.com/damienbod/AspNet5Localization^0|0|2|J|N|O|1C|O|28|4|0|0|0|0|1I|E|1|0|0|0|0|0|K|1C|2|0^^$0|@$1|2|3|4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1D|8|@$D|1E|E|1F|F|G]|$D|1G|E|1H|F|G]|$D|1I|E|1J|F|G]]|9|@$D|1K|E|1L|1|1M]]|A|$]]|$1|H|3|I|5|J|7|1N|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1O|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1P|8|@]|9|@$D|1Q|E|1R|1|1S]]|A|$]]|$1|Q|3|R|5|6|7|1T|8|@]|9|@]|A|$]]|$1|S|3|T|5|J|7|1U|8|@]|9|@]|A|$K|L]]|$1|U|3|V|5|6|7|1V|8|@]|9|@]|A|$]]|$1|W|3|X|5|J|7|1W|8|@]|9|@]|A|$K|L]]|$1|Y|3|Z|5|6|7|1X|8|@]|9|@$D|1Y|E|1Z|1|20]]|A|$]]|$1|10|3|-4|5|6|7|21|8|@]|9|@]|A|$]]]|11|$12|$5|13|14|15|A|$16|17]]|18|$5|13|14|15|A|$16|19]]|1A|$5|13|14|15|A|$16|1B]]]]

If you want to change the complete text, you should use resource files to localize it.
Every <code>ValidationAttribute</code> has properties for <code>ErrorMessageResourceType</code> and <code>ErrorMessageResourceName</code> (see source <a href="https://github.com/dotnet/corefx/blob/v1.1.0/src/System.ComponentModel.Annotations/src/System/ComponentModel/DataAnnotations/ValidationAttribute.cs#L161-L198" rel="nofollow noreferrer">here</a>).
<pre><code>[Required(ErrorMessageResourceName = &quot;BoxLengthRequired&quot;, ErrorMessageResourceType = typeof(SharedResource))]
</code></pre>
<h3>Update</h3>
Okay, there seems to be a way to use the localization provider to localize it, but it's still a bit hacky and requires at least one property on the attribute (from <a href="https://damienbod.com/2015/10/24/using-dataannotations-and-localization-in-asp-net-5-mvc-6/" rel="nofollow noreferrer">this blog post</a> - Word of warning though, it was initially for an old RC1 or RC2 version. It should work, but some of the API in that article may not work):
In startup:
<pre><code>services.AddMvc()
 .AddViewLocalization()
 .AddDataAnnotationsLocalization();
</code></pre>
On your model:
<pre><code>[Required(ErrorMessage = &quot;ViewModelPropertyRequired&quot;), MinLength(10, ErrorMessage = &quot;ViewModelMinLength&quot;)]
public string RequiredProperty { get; set; }
</code></pre>
and implement/use an localization provider that uses DB (i.e. <a href="https://github.com/damienbod/AspNet5Localization" rel="nofollow noreferrer">https://github.com/damienbod/AspNet5Localization</a>).

blocks|key|1648945|text|我遇到了同样的问题，我使用的解决方案是创建验证属性的子类来提供本地化的错误消息。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1648946|为了防止程序员意外地使用非本地化版本，我只是省略了非本地化库的using语句。|1648947|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I encountered the same problem and the solution I used was to create a subclass of the validation attribute to provide the localized error message. 

To prevent programmers from accidentally using the non-localized version, I just left out the using statement for the non-localized library.

blocks|key|1649027|text|所以，我来到这里是因为创建了我自己的自定义IStringLocalizer，并想分享我的解决方案，因为@jlchavez帮助了我。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1649028|我创建了一个MongoDB+IStringLocalizer，并希望通过DataAnnotations使用资源。问题是DataAnnotations属性期望通过暴露资源的静态类进行本地化。|1649029|与jlchavez's+answer相比的一个增强是，这将修复所有ValidationAttribute的资源消息|offset|length|1649030|services.AddTransient<IValidationMetadataProvider,+Models.LocalizedValidationMetadataProvider>();
services.AddOptions<MvcOptions>()
++++.Configure<IValidationMetadataProvider>((options,+provider)+=>
++++{
++++++++options.ModelMetadataDetailsProviders.Add(provider);
++++});


public+class+Resource
{
++++public+string+Id+=>+Culture+%2B+"."+%2B+Name;
++++public+string+Culture+{+get;+set;+}
++++public+string+Name+{+get;+set;+}
++++public+string+Text+{+get;+set;+}
}

public+class+MongoLocalizerFactory+:+IStringLocalizerFactory
{
++++private+readonly+IMongoCollection<Resource>+_resources;

++++public+MongoLocalizerFactory(IMongoCollection<Resource>+resources)
++++{
++++++++_resources+=+resources;
++++}

++++public+IStringLocalizer+Create(Type+resourceSource)
++++{
++++++++return+new+MongoLocalizer(_resources);
++++}

++++public+IStringLocalizer+Create(string+baseName,+string+location)
++++{
++++++++return+new+MongoLocalizer(_resources);
++++}
}

public+class+MongoLocalizer+:+IStringLocalizer
{
++++private+readonly+IMongoCollection<Resource>+_resources;

++++public+MongoLocalizer(IMongoCollection<Resource>+resources)
++++{
++++++++_resources+=+resources;
++++}

++++public+LocalizedString+this[string+name]
++++{
++++++++get
++++++++{
++++++++++++var+value+=+GetString(name);
++++++++++++return+new+LocalizedString(name,+value+??+name,+resourceNotFound:+value+==+null);
++++++++}
++++}

++++public+LocalizedString+this[string+name,+params+object[]+arguments]
++++{
++++++++get
++++++++{
++++++++++++var+format+=+GetString(name);
++++++++++++var+value+=+string.Format(format+??+name,+arguments);
++++++++++++return+new+LocalizedString(name,+value,+resourceNotFound:+format+==+null);
++++++++}
++++}

++++public+IStringLocalizer+WithCulture(CultureInfo+culture)
++++{
++++++++CultureInfo.DefaultThreadCurrentCulture+=+culture;

++++++++return+new+MongoLocalizer(_resources);
++++}

++++public+IEnumerable<LocalizedString>+GetAllStrings(bool+includeAncestorCultures)
++++{
++++++++var+resources+=+_resources.Find(r+=>+r.Culture+==+CultureInfo.CurrentCulture.Parent.Name).ToList();
++++++++return+resources.Select(r+=>+new+LocalizedString(r.Name,+r.Text,+false));
++++}

++++private+string+GetString(string+name)
++++{
++++++++var+resource+=+_resources.Find(r+=>+r.Culture+==+CultureInfo.CurrentCulture.Parent.Name+&&+r.Name+==+name).SingleOrDefault();
++++++++if+(resource+!=+null)
++++++++{
++++++++++++return+new+LocalizedString(resource.Name,+resource.Text,+false);
++++++++}
++++++++return+new+LocalizedString(name,+name,+true);
++++}
}

public+class+LocalizedValidationMetadataProvider+:+IValidationMetadataProvider
{
++++private+IStringLocalizer+_localizer;

++++public+LocalizedValidationMetadataProvider(IStringLocalizer+localizer)
++++{
++++++++_localizer+=+localizer;
++++}

++++public+void+CreateValidationMetadata(ValidationMetadataProviderContext+context)
++++{
++++++++foreach(var+metadata+in+context.ValidationMetadata.ValidatorMetadata)
++++++++{
++++++++++++if+(metadata+is+ValidationAttribute+attribute)
++++++++++++{
++++++++++++++++attribute.ErrorMessage+=+_localizer[attribute.ErrorMessage].Value;
++++++++++++}
++++++++}
++++}
}|code-block|syntax|javascript|1649031|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/40788092/how-to-provide-localized-validation-messages-for-validation-attributes/56518338#56518338^0|0|0|1|H|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@$F|X|G|Y|1|Z]]|A|$]]|$1|H|3|I|5|J|7|10|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

So, I landed here because of creating my own custom IStringLocalizer and wanted to share my solution because @jlchavez helped me out.
I created a MongoDB IStringLocalizer and wanted to use the resources via the DataAnnotations. Problem is that DataAnnotations Attributes expect localizations via a static class exposing the resources.
One enhancement over <a href="https://stackoverflow.com/questions/40788092/how-to-provide-localized-validation-messages-for-validation-attributes/56518338#56518338">jlchavez's answer</a> is that this will fix the resource messages for all ValidationAttribute(s)
<pre><code>services.AddTransient&lt;IValidationMetadataProvider, Models.LocalizedValidationMetadataProvider&gt;();
services.AddOptions&lt;MvcOptions&gt;()
 .Configure&lt;IValidationMetadataProvider&gt;((options, provider) =&gt;
 {
 options.ModelMetadataDetailsProviders.Add(provider);
 });


public class Resource
{
 public string Id =&gt; Culture + &quot;.&quot; + Name;
 public string Culture { get; set; }
 public string Name { get; set; }
 public string Text { get; set; }
}

public class MongoLocalizerFactory : IStringLocalizerFactory
{
 private readonly IMongoCollection&lt;Resource&gt; _resources;

 public MongoLocalizerFactory(IMongoCollection&lt;Resource&gt; resources)
 {
 _resources = resources;
 }

 public IStringLocalizer Create(Type resourceSource)
 {
 return new MongoLocalizer(_resources);
 }

 public IStringLocalizer Create(string baseName, string location)
 {
 return new MongoLocalizer(_resources);
 }
}

public class MongoLocalizer : IStringLocalizer
{
 private readonly IMongoCollection&lt;Resource&gt; _resources;

 public MongoLocalizer(IMongoCollection&lt;Resource&gt; resources)
 {
 _resources = resources;
 }

 public LocalizedString this[string name]
 {
 get
 {
 var value = GetString(name);
 return new LocalizedString(name, value ?? name, resourceNotFound: value == null);
 }
 }

 public LocalizedString this[string name, params object[] arguments]
 {
 get
 {
 var format = GetString(name);
 var value = string.Format(format ?? name, arguments);
 return new LocalizedString(name, value, resourceNotFound: format == null);
 }
 }

 public IStringLocalizer WithCulture(CultureInfo culture)
 {
 CultureInfo.DefaultThreadCurrentCulture = culture;

 return new MongoLocalizer(_resources);
 }

 public IEnumerable&lt;LocalizedString&gt; GetAllStrings(bool includeAncestorCultures)
 {
 var resources = _resources.Find(r =&gt; r.Culture == CultureInfo.CurrentCulture.Parent.Name).ToList();
 return resources.Select(r =&gt; new LocalizedString(r.Name, r.Text, false));
 }

 private string GetString(string name)
 {
 var resource = _resources.Find(r =&gt; r.Culture == CultureInfo.CurrentCulture.Parent.Name &amp;&amp; r.Name == name).SingleOrDefault();
 if (resource != null)
 {
 return new LocalizedString(resource.Name, resource.Text, false);
 }
 return new LocalizedString(name, name, true);
 }
}

public class LocalizedValidationMetadataProvider : IValidationMetadataProvider
{
 private IStringLocalizer _localizer;

 public LocalizedValidationMetadataProvider(IStringLocalizer localizer)
 {
 _localizer = localizer;
 }

 public void CreateValidationMetadata(ValidationMetadataProviderContext context)
 {
 foreach(var metadata in context.ValidationMetadata.ValidatorMetadata)
 {
 if (metadata is ValidationAttribute attribute)
 {
 attribute.ErrorMessage = _localizer[attribute.ErrorMessage].Value;
 }
 }
 }
}
</code></pre>

I am working on an <a href="https://en.wikipedia.org/wiki/ASP.NET_Core" rel="nofollow noreferrer">ASP.NET Core</a> application and I would like to override the default validation error messages for data-annotations, like <code>Required</code>, <code>MinLength</code>, <code>MaxLength</code>, etc. I read the documentation at <a href="https://docs.microsoft.com/en-us/aspnet/core/fundamentals/localization" rel="nofollow noreferrer">Globalization and localization in ASP.NET Core</a>, and it seems that it does not cover what I was looking for...
For instance, a validation error message for the <code>Required</code> attribute can always be the same for any model property. The default text just states: The {0} field is required, whereby the <code>{0}</code> placeholder will be filled up with the property’s display name.
In my view models, I use the <code>Required</code> attribute without any named arguments, like this...
<pre><code>class ViewModel
{
 [Required, MinLength(10)]
 public string RequiredProperty { get; set; }
}
</code></pre>
Setting an <code>ErrorMessage</code> or <code>ErrorMessageResourceName</code> (and <code>ErrorMessageResourceType</code>) is unnecessary overhead, in my opinion. I thought I could implement something similar to <code>IDisplayMetadataProvider</code> allowing me to return error messages for applied attributes, in case the validation has failed. Is this possible?

How to provide localized validation messages for validation attributes

MongoDB

我正在开发一个应用程序，我想覆盖数据注释的默认验证错误消息，如Required、MinLength、MaxLength等。我在上阅读了文档，但似乎没有涵盖我正在寻找的内容……例如，Required属性的验证错误消息对于任何模型属性都可以是相同的。默认文本只说明：{0}字段是必需的，因此{0}占位符将用属性的显示名称填充...

问如何为验证属性提供本地化验证消息
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何为验证属性提供本地化验证消息EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何为验证属性提供本地化验证消息
EN