Customization of Identity password error messages #10217

2 Answer(s)

• 

  0

  maliming created 7 hours ago

  Support Team Fullstack Developer

  hi

  1

  You can override the GetLocalizeExceptionMessage method of AccountPageModel

  If the exception is AbpIdentityResultException, use your custom code to get the error message list to an array.

  https://github.com/abpframework/abp/blob/dev/modules/identity/src/Volo.Abp.Identity.Domain/Microsoft/AspNetCore/Identity/AbpIdentityResultExtensions.cs#L112-L134

  2

  Add your custom IdentityPasswordValidator

  public override void PreConfigureServices(ServiceConfigurationContext context)
  {
      PreConfigure<IdentityBuilder>(builder =>
      {
          builder
              .AddUserValidator<MaxUserCountValidator>()
              .AddPasswordValidator<YourAbpIdentityPasswordValidator>();
      });
  }
  
  
  return new IdentityError
  {
      Code = Your_Code,
      Description = Your_Description
  };
  
  

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• 

  0

  AI-Bot created 3 hours ago

  Support Team ABP Agent

  1. Solution

  • Show password errors on separate lines (Auth Server MVC)
    • Create a custom Account page model by overriding AccountPageModel.GetLocalizedExceptionMessage to split Identity password errors and join them with newline characters.
    • Sample implementation:

  using System.Linq;
    using System.Text;
    using Microsoft.AspNetCore.Identity;
    using Volo.Abp.Account.Web.Pages.Account;
    using Volo.Abp;
    using Volo.Abp.ExceptionHandling;
  
    namespace MyCompany.MyProject.Web.Pages.Account
    {
        // Works for Login/Register/Manage pages that inherit AccountPageModel
        public class MyAccountPageModel : AccountPageModel
        {
            protected override string GetLocalizedExceptionMessage(Exception exception)
            {
                // handle ABP-wrapped Identity errors
                if (exception is AbpIdentityResultException abpIdentityEx)
                {
                    // Collect each error description and format as separate lines
                    var lines = abpIdentityEx
                        .IdentityResult
                        .Errors
                        .Select(e => L[e.Description].Value) // localize each description
                        .ToArray();
  
                    if (lines.Length > 0)
                    {
                        return string.Join(Environment.NewLine, lines);
                    }
                }
  
                // fallback to the default implementation
                return base.GetLocalizedExceptionMessage(exception);
            }
        }
    }
  

  • Then place Razor pages (e.g., Register.cshtml, Login.cshtml, ChangePassword.cshtml) under Pages/Account in your HttpApi.Host and set their @model to your derived PageModel (e.g., CustomRegisterModel : RegisterModel) which in turn can use the above override via a shared base.

  • ABP already converts IdentityResult to AbpIdentityResultException; you only need to detect it and build your own message list. AbpIdentityResultExtensions exposes helpers to format errors if you prefer to reuse.

  • Add a custom password validator and return your own error messages

    • Implement a custom IPasswordValidator<IdentityUser> (or derive from PasswordValidator<IdentityUser>) and return IdentityError items for your custom rules. Add it via PreConfigure to IdentityBuilder so it runs with the built-in validators.

  using System.Threading.Tasks;
    using Microsoft.AspNetCore.Identity;
    using Volo.Abp.DependencyInjection;
    using Volo.Abp.Identity;
  
    public class MyPasswordValidator : IPasswordValidator<IdentityUser>, ITransientDependency
    {
        public Task<IdentityResult> ValidateAsync(UserManager<IdentityUser> manager, IdentityUser user, string password)
        {
            var errors = new List<IdentityError>();
  
            // Example: built-in checks are already configured by IdentityOptions.
            // Add your own custom rule:
            if (password?.Contains("my-disallowed-fragment", StringComparison.OrdinalIgnoreCase) == true)
            {
                errors.Add(new IdentityError
                {
                    Code = "MyCustomPasswordRule",
                    Description = "My custom password validation error message."
                });
            }
  
            return Task.FromResult(errors.Count == 0 ? IdentityResult.Success : IdentityResult.Failed(errors.ToArray()));
        }
    }
  

  • Register your validator:

  using Microsoft.AspNetCore.Identity;
    using Microsoft.Extensions.DependencyInjection;
    using Volo.Abp.Identity;
    using Volo.Abp.Modularity;
  
    [DependsOn(typeof(AbpIdentityApplicationModule))]
    public class MyProjectIdentityModule : AbpModule
    {
        public override void PreConfigureServices(ServiceConfigurationContext context)
        {
            PreConfigure<IdentityBuilder>(builder =>
            {
                builder.AddPasswordValidator<MyPasswordValidator>();
                // you can also add user validators: .AddUserValidator<YourUserValidator>()
            });
        }
    }
  

  • Localization: you can localize your custom error’s Description with the ABP localization system (e.g., L["MyCustomPasswordRuleMessage"]) before returning it, or return a code and map it to a localized string in your overridden GetLocalizedExceptionMessage.

  • Notes on sources/extension points

    • ABP wraps IdentityResult errors into AbpIdentityResultException; you access the underlying IdentityResult.Errors to construct any UI you like (each error on a new line, bullet list, etc.).
    • If you want to keep the default toast but render multi-line text, ensure the UI uses the returned message from GetLocalizedExceptionMessage and preserves line breaks (e.g., white-space CSS or replacing “\n” with <br /> in Razor if needed).

  2. Sources

  • ABP IdentityResult helpers used by AbpIdentityResultException:
    • https://github.com/abpframework/abp/blob/dev/modules/identity/src/Volo.Abp.Identity.Domain/Microsoft/AspNetCore/Identity/AbpIdentityResultExtensions.cs#L112-L134
  • ABP Module system for PreConfigure/DependsOn:
    • https://abp.io/docs/latest/framework/architecture/modularity/basics
  • Customizing Account (login) pages and PageModels:
    • https://abp.io/community/articles/9a40f3cd

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