public class RegistrationRequest { [StringLength(maximumLength: 50, MinimumLength = 2, ErrorMessage = "     2  50 ")] [Required(ErrorMessage = " ")] public string Name { get; set; } [Required(ErrorMessage = "  . ")] [EmailAddress(ErrorMessage = "  . ")] public string Email { get; set; } [Required(ErrorMessage = " ")] [MaxLength(100, ErrorMessage = "{0}    {1} ")] [MinLength(6, ErrorMessage ="{0}    {1} ")] [DisplayName("")] public string Password { get; set; } [Required(ErrorMessage = " ")] [Range(18,150, ErrorMessage = "      18  150")] public string Age { get; set; } [DisplayName("")] public string Culture { get; set; } } 

 public class ResxValidator { public const char ValuesSeparator = ','; public const char RangeSeparator = '-'; public enum Keywords { DisplayName, Message, Required, Pattern, Length, MinLength, MaxLength, Range, MinValue, MaxValue, Values, Compare } private readonly Dictionary<Keywords, Func<string, string, bool>> _rules = new Dictionary<Keywords, Func<string, string, bool>>() { [Keywords.Required] = (v, arg) => !string.IsNullOrEmpty(v), [Keywords.Pattern] = (v, arg) => !string.IsNullOrWhiteSpace(v) && Regex.IsMatch(v, arg), [Keywords.Range] = (v, arg) => !string.IsNullOrWhiteSpace(v) && long.TryParse(v, out var vLong) && long.TryParse(arg.Split(RangeSeparator)[0].Trim(), out var vMin) && long.TryParse(arg.Split(RangeSeparator)[1].Trim(), out var vMax) && vLong >= vMin && vLong <= vMax, [Keywords.Length] = (v, arg) => !string.IsNullOrWhiteSpace(v) && long.TryParse(arg.Split(RangeSeparator)[0].Trim(), out var vMin) && long.TryParse(arg.Split(RangeSeparator)[1].Trim(), out var vMax) && v.Length >= vMin && v.Length <= vMax, [Keywords.MinLength] = (v, arg) => !string.IsNullOrWhiteSpace(v) && v.Length >= int.Parse(arg), [Keywords.MaxLength] = (v, arg) => !string.IsNullOrWhiteSpace(v) && v.Length <= int.Parse(arg), [Keywords.Values] = (v, arg) => !string.IsNullOrWhiteSpace(v) && arg.Split(ValuesSeparator).Select(x => x.Trim()).Contains(v), [Keywords.MinValue] = (v, arg) => !string.IsNullOrEmpty(v) && long.TryParse(v, out var vLong) && long.TryParse(arg, out var argLong) && vLong >= argLong, [Keywords.MaxValue] = (v, arg) => !string.IsNullOrEmpty(v) && long.TryParse(v, out var vLong) && long.TryParse(arg, out var argLong) && vLong <= argLong }; private readonly IStringLocalizer _localizer; public ResxValidator(IStringLocalizer localizer) { _localizer = localizer; } public bool IsValid(string memberName, string value, out string message) { var rules = _rules.Select(x => new { Name = x.Key, Check = x.Value, String = _localizer.GetString(memberName + x.Key) }).Where(x => x.String != null && !x.String.ResourceNotFound); foreach (var rule in rules) { if (!rule.Check(value, rule.String?.Value)) { var messageResourceKey = $"{memberName}{rule.Name}{Keywords.Message}"; var messageResource = _localizer[messageResourceKey]; var displayNameResourceKey = $"{memberName}{Keywords.DisplayName}"; var displayNameResource = _localizer[displayNameResourceKey] ?? displayNameResourceKey; message = messageResource != null && !messageResource.ResourceNotFound ? string.Format(messageResource.Value, displayNameResource, rule.String?.Value) : messageResourceKey; return false; } } message = null; return true; } } 

 public sealed class ResxAttribute : ValidationAttribute { private readonly string _baseName; private string _resourceName; public ResxAttribute(string sectionName, string resourceName = null) { _baseName = sectionName; _resourceName = resourceName; } protected override ValidationResult IsValid(object value, ValidationContext validationContext) { if (_resourceName == null) _resourceName = validationContext.MemberName; var factory = validationContext .GetService(typeof(IStringLocalizerFactory)) as IStringLocalizerFactory; var localizer = factory?.Create(_baseName, System.Reflection.Assembly.GetExecutingAssembly().GetName().Name); ErrorMessage = ErrorMessageString; var currentValue = value as string; var validator = new ResxValidator(localizer); return validator.IsValid(_resourceName, currentValue, out var message) ? ValidationResult.Success : new ValidationResult(message); } } 

  [Route("[controller]")] [ApiController] public class LocaleController : ControllerBase { private readonly IStringLocalizerFactory _factory; private readonly string _assumbly; private readonly string _location; public LocaleController(IStringLocalizerFactory factory) { _factory = factory; _assumbly = System.Reflection.Assembly.GetExecutingAssembly().GetName().Name; _location = Path.Combine(Directory.GetCurrentDirectory(), "Resources"); } [HttpGet("Config")] public IActionResult GetConfig(string culture) { if (!string.IsNullOrEmpty(culture)) { CultureInfo.CurrentCulture = new CultureInfo(culture); CultureInfo.CurrentUICulture = new CultureInfo(culture); } var resources = Directory.GetFiles(_location, "*.resx", SearchOption.AllDirectories) .Select(x => x.Replace(_location + Path.DirectorySeparatorChar, string.Empty)) .Select(x => x.Substring(0, x.IndexOf('.'))) .Distinct(); var config = new Dictionary<string, Dictionary<string, string>>(); foreach (var resource in resources.Select(x => x.Replace('\\', '.'))) { var section = _factory.Create(resource, _assumbly) .GetAllStrings() .OrderBy(x => x.Name) .ToDictionary(x => x.Name, x => x.Value); config.Add(resource.Replace('.', '-'), section); } var result = JsonConvert.SerializeObject(config, Formatting.Indented); return Ok(result); } } 

 { "Controllers-AccountController": { "AgeDisplayName": "Age", "AgeRange": "18 - 150", "AgeRangeMessage": "{0} must be {1}", "EmailDisplayName": "Email", "EmailPattern": "^[-\\w.]+@([A-z0-9][-A-z0-9]+\\.)+[Az]{2,4}$", "EmailPatternMessage": "Incorrect email", "EmailRequired": "", "EmailRequiredMessage": "Email required", "LanguageDisplayName": "Language", "LanguageValues": "ru-RU, en-US", "LanguageValuesMessage": "Incorrect language. Possible: {1}", "NameDisplayName": "Name", "NameLength": "2 - 50", "NameLengthMessage": "Name length must be {1} characters", "PasswordConfirmCompare": "Password", "PasswordConfirmCompareMessage": "Passwords must be the same", "PasswordConfirmDisplayName": "Password confirmation", "PasswordDisplayName": "Password", "PasswordMaxLength": "100", "PasswordMaxLengthMessage": "{0} can't be greater than {1} characters", "PasswordMinLength": "8", "PasswordMinLengthMessage": "{0} must be at least {1} characters", "PasswordRequired": "", "PasswordRequiredMessage": "Password required", "RegisteredMessage": "{0}, you've been registered!" } } 

 { "Controllers-AccountController": { "AgeDisplayName": "", "AgeRange": "18 - 150", "AgeRangeMessage": "{0}     {1}", "EmailDisplayName": " . ", "EmailPattern": "^[-\\w.]+@([A-z0-9][-A-z0-9]+\\.)+[Az]{2,4}$", "EmailPatternMessage": "  . ", "EmailRequired": "", "EmailRequiredMessage": "  . ", "LanguageDisplayName": "", "LanguageValues": "ru-RU, en-US", "LanguageValuesMessage": " .  : {1}", "NameDisplayName": "", "NameLength": "2 - 50", "NameLengthMessage": "    {1} ", "PasswordConfirmCompare": "Password", "PasswordConfirmCompareMessage": "  ", "PasswordConfirmDisplayName": " ", "PasswordDisplayName": "", "PasswordMaxLength": "100", "PasswordMaxLengthMessage": "{0}    {1} ", "PasswordMinLength": "6", "PasswordMinLengthMessage": "{0}    {1} ", "PasswordRequired": "", "PasswordRequiredMessage": " ", "RegisteredMessage": "{0},  !" } } 

 const ErrorHandlerService = { parseResponseError (error) { if (error.toString().includes('Network Error')) { return 'ServerUnavailable' } if (error.response) { let statusText = error.response.statusText; if (error.response.data && error.response.data.errors) { let message = ''; for (let property in error.response.data.errors) { error.response.data.errors[property].forEach(function (entry) { if (entry) { message += entry + '\n' } }) } return message } else if (error.response.data && error.response.data.message) { return error.response.data.message } else if (statusText) { return statusText } } } }; export { ErrorHandlerService } 

 import i18n from '../i18n'; const LocaleService = { getRules(resource, options) { let rules = []; options = this.prepareOptions(options); this.addRequireRule(rules, resource, options); this.addPatternRule(rules, resource, options); this.addRangeRule(rules, resource, options); this.addLengthRule(rules, resource, options); this.addMaxLengthRule(rules, resource, options); this.addMinLengthRule(rules, resource, options); this.addValuesRule(rules, resource, options); this.addCompareRule(rules, resource, options); return rules; }, prepareOptions(options){ let getter = v => v; let compared = () => null; if (!options){ options = { getter: getter, compared: compared }; } if (!options.getter) options.getter = getter; if (!options.compared) options.compared = compared; return options; }, addRequireRule(rules, resource, options){ let settings = this.getRuleSettings(resource, 'Required'); if(settings){ rules.push(v => !!options.getter(v) || settings.message); } }, addPatternRule(rules, resource, options){ let settings = this.getRuleSettings(resource, 'Pattern'); if(settings){ rules.push(v => !!options.getter(v) || settings.message); rules.push(v => new RegExp(settings.value).test(options.getter(v)) || settings.message); } }, addRangeRule(rules, resource, options){ let settings = this.getRuleSettings(resource, 'Range'); if(settings){ let values = settings.value.split('-'); rules.push(v => !!options.getter(v) || settings.message); rules.push(v => parseInt(options.getter(v)) >= values[0] && parseInt(options.getter(v)) <= values[1] || settings.message); } }, addLengthRule(rules, resource, options){ let settings = this.getRuleSettings(resource, 'Length'); if(settings){ let values = settings.value.split('-'); rules.push(v => !!options.getter(v) || settings.message); rules.push(v => options.getter(v).length >= values[0] && options.getter(v).length <= values[1] || settings.message); } }, addMaxLengthRule(rules, resource, options){ let settings = this.getRuleSettings(resource, 'MaxLength'); if(settings){ rules.push(v => !!options.getter(v) || settings.message); rules.push(v => options.getter(v).length <= settings.value || settings.message); } }, addMinLengthRule(rules, resource, options){ let settings = this.getRuleSettings(resource, 'MinLength'); if(settings){ rules.push(v => !!options.getter(v) || settings.message); rules.push(v => options.getter(v).length >= settings.value || settings.message); } }, addValuesRule(rules, resource, options){ let settings = this.getRuleSettings(resource, 'Values'); if(settings) { let values = settings.value.split(','); rules.push(v => !!options.getter(v) || settings.message); rules.push(v => !!values.find(x => x.trim() === options.getter(v)) || settings.message); } }, addCompareRule(rules, resource, options){ let settings = this.getRuleSettings(resource, 'Compare'); if(settings) { rules.push(() => { return settings.value === '' || !!settings.value || settings.message }); rules.push(v => { return options.getter(v) === options.compared() || settings.message; }); } }, getRuleSettings(resource, rule){ let value = this.getRuleValue(resource, rule); let message = this.getRuleMessage(resource, rule, value); return value === '' || value ? { value: value, message: message } : null; }, getRuleValue(resource, rule){ let key =`${resource}${rule}`; return this.getI18nValue(key); }, getDisplayName(resource){ let key =`${resource}DisplayName`; return this.getI18nValue(key); }, getRuleMessage(resource, rule, value){ let key =`${resource}${rule}Message`; return i18n.t(key, [this.getDisplayName(resource), value]); }, getI18nValue(key){ let value = i18n.t(key); return value !== key ? value : null; } }; export { LocaleService }