Automatically localize data annotation validation errors.

src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/ModelBinding/Metadata/AbpModelMetadataProvider.cs

@@ -0,0 +1,63 @@
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Reflection;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.ModelBinding;
+using Microsoft.AspNetCore.Mvc.ModelBinding.Metadata;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Options;
+using Volo.Abp.DependencyInjection;
+
+namespace Volo.Abp.AspNetCore.Mvc.ModelBinding.Metadata
+{
+    [Dependency(ServiceLifetime.Singleton, ReplaceServices = true)]
+    [ExposeServices(typeof(IModelMetadataProvider))]
+    public class AbpModelMetadataProvider : DefaultModelMetadataProvider
+    {
+        private static readonly PropertyInfo ValidationAttributeErrorMessageStringProperty;
+
+        static AbpModelMetadataProvider()
+        {
+            ValidationAttributeErrorMessageStringProperty = typeof(ValidationAttribute)
+                .GetProperty("ErrorMessageString", BindingFlags.Instance | BindingFlags.NonPublic);
+        }
+
+        public AbpModelMetadataProvider(ICompositeMetadataDetailsProvider detailsProvider)
+            : base(detailsProvider)
+        {
+        }
+
+        public AbpModelMetadataProvider(ICompositeMetadataDetailsProvider detailsProvider, IOptions<MvcOptions> optionsAccessor)
+            : base(detailsProvider, optionsAccessor)
+        {
+        }
+
+        protected override DefaultMetadataDetails[] CreatePropertyDetails(ModelMetadataIdentity key)
+        {
+            var details = base.CreatePropertyDetails(key);
+
+            foreach (var detail in details)
+            {
+                NormalizeMetadataDetail(detail);
+            }
+
+            return details;
+        }
+
+        private void NormalizeMetadataDetail(DefaultMetadataDetails detail)
+        {
+            foreach (var validationAttribute in detail.ModelAttributes.Attributes.OfType<ValidationAttribute>())
+            {
+                NormalizeValidationAttrbute(validationAttribute);
+            }
+        }
+
+        protected virtual void NormalizeValidationAttrbute(ValidationAttribute validationAttribute)
+        {
+            if (validationAttribute.ErrorMessage == null)
+            {
+                validationAttribute.ErrorMessage = ValidationAttributeErrorMessageStringProperty.GetValue(validationAttribute) as string;
+            }
+        }
+    }
+}

src/Volo.Abp.Identity.Web/Pages/Identity/Users/CreateModal.cshtml.cs

@@ -47,13 +47,13 @@ namespace Volo.Abp.Identity.Web.Pages.Identity.Users
 
         public class UserInfoViewModel
         {
-            [Required(ErrorMessage = "The {0} field is required.")]
+            [Required]
             [MaxLength(IdentityUserConsts.MaxUserNameLength)]
             [Display(Name = "UserName")]
             public string UserName { get; set; }
 
             [Required]
-            [MaxLength(IdentityUserConsts.MaxPasswordLength, ErrorMessage = "The field {0} must be a string or array type with a maximum length of '{1}'.")]
+            [MaxLength(IdentityUserConsts.MaxPasswordLength)]
             [DataType(DataType.Password)]
             [Display(Name = "Password")]
             public string Password { get; set; }