Do one of the following: A) Create a Host app and import your module
B) Start from an Empty solution, add a module, then add a Host app
Notes:
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Fix it by injecting IConfiguration (or using GetRequiredService<IConfiguration> from the service provider) and using it where _configuration is referenced.
Option A: Constructor inject IConfiguration in the seeder
Example:
using Microsoft.Extensions.Configuration;
using Volo.Abp.DependencyInjection;
using Volo.Abp.Data;
namespace Microservicev10.IdentityService.Data.OpenIddict;
public class OpenIddictDataSeeder : IDataSeedContributor, ITransientDependency
{
private readonly IConfiguration _configuration;
// other injections...
public OpenIddictDataSeeder(
IConfiguration configuration
/* other dependencies */
)
{
_configuration = configuration;
// assign others...
}
public async Task SeedAsync(DataSeedContext context)
{
// Use _configuration["OpenIddict:Applications:MyClient:RootUrl"] etc.
// Your existing seeding logic...
}
}
Option B: Resolve IConfiguration on demand If you already have IServiceProvider injected, resolve configuration when needed:
public async Task SeedAsync(DataSeedContext context)
{
var configuration = _serviceProvider.GetRequiredService<IConfiguration>();
var rootUrl = configuration["OpenIddict:Applications:MyClient:RootUrl"];
// ...
}
Common places that use _configuration in OpenIddict seeders:
Also ensure the seeder runs:
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Architecture to meet your requirements
Steps
GlobalFeatureManager.Instance.Modules.CmsKit(cmsKit =>
{
cmsKit.EnableAll(); // or enable specific CmsKit features
});
GlobalFeatureManager.Instance.Modules.CmsKitPro(cmsKitPro =>
{
cmsKitPro.EnableAll(); // or enable specific Pro features like Newsletter, Contact Form, URL Forwarding, Poll, etc.
});
- Add EF Core migration and update the database after enabling features.
Configure tenant resolution for the Public Website
Anonymous/public access
[AllowAnonymous]
public class MyPublicController : AbpController
{
// read-only endpoints rendering tenant-specific content
}
One public site vs per-tenant sites
Features per tenant
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Apply the checklist below. It mirrors the verified ABP guidance and fixes most AAD external login issues.
A. Ensure the correct external SignIn scheme and claim mapping
private void ConfigureExternalProviders(ServiceConfigurationContext context)
{
var configuration = context.Services.GetConfiguration();
context.Services.AddAuthentication()
.AddOpenIdConnect("AzureOpenId", "Azure Active Directory OpenId", options =>
{
options.Authority = "https://login.microsoftonline.com/" + configuration["AzureAd:TenantId"] + "/v2.0/";
options.ClientId = configuration["AzureAd:ClientId"];
options.ClientSecret = configuration["AzureAd:ClientSecret"];
options.ResponseType = OpenIdConnectResponseType.CodeIdToken; // or Code
options.CallbackPath = configuration["AzureAd:CallbackPath"]; // e.g. /signin-azuread-oidc
options.RequireHttpsMetadata = true; // keep true in Azure
options.SaveTokens = true;
options.GetClaimsFromUserInfoEndpoint = true;
// Important for ABP external logins:
options.SignInScheme = IdentityConstants.ExternalScheme;
options.Scope.Add("email");
options.ClaimActions.MapJsonKey(ClaimTypes.NameIdentifier, "sub");
// If you need to override RedirectUri in prod (behind reverse proxy):
if (context.Services.GetHostingEnvironment().IsProduction())
{
options.Events = new OpenIdConnectEvents
{
OnRedirectToIdentityProvider = ctx =>
{
// Use your public https URL + CallbackPath, if Azure is terminating TLS/proxying.
// Example: https://your-public-domain/signin-azuread-oidc
ctx.ProtocolMessage.RedirectUri = configuration["AzureAd:RedirectToIdentityProviderUri"];
return Task.CompletedTask;
}
};
}
});
}
B. Validate Redirect URI and CallbackPath consistency
C. Ensure email scope is requested
D. Behind reverse proxy/Azure App Service specifics
E. Cookie/SameSite considerations
F. Quick diagnostics
G. Multi-tenant or dynamic provider settings (if applicable)
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Why the 403 happens
Fix your account/organization linkage
Implementing cart → checkout → payment → access granting
If you use the ABP Payment Module (Commercial):
If you can’t use the Commercial module:
Example event handler to grant access after payment:
public class OrderPaidEventHandler : ILocalEventHandler<OrderPaidEvent>, ITransientDependency
{
private readonly IRepository<Enrollment, Guid> _enrollmentRepo;
public OrderPaidEventHandler(IRepository<Enrollment, Guid> enrollmentRepo)
{
_enrollmentRepo = enrollmentRepo;
}
public async Task HandleEventAsync(OrderPaidEvent eventData)
{
var order = eventData.Entity;
foreach (var item in order.Items)
{
await _enrollmentRepo.InsertAsync(new Enrollment(order.UserId, item.CourseId), autoSave: true);
}
}
}
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Root cause: A known NullReferenceException occurs on the Users page when clicking entity actions (like Sessions or View Details) if the corresponding modal/component references are not initialized in Blazor Web App (Interactive Server/Auto). In ABP 10.0 (Identity Pro Blazor), the action handlers expect their modal components to be present and referenced. If those components are missing/not rendered (e.g., conditional rendering or missing @ref), the backing fields like SessionsModal or ViewDetailsModal are null and actions throw.
Fix: Ensure the required modals/components are in the page markup and their references are assigned before actions run.
Concrete example for a customized Users page (pattern you can adopt for Sessions/View Details too):
@using Volo.Abp.PermissionManagement.Blazor.Components
<MudDataGrid T="IdentityUserDto" @ref="_dataGrid" ServerData="LoadServerData">
<!-- ...columns... -->
<Columns>
<MudBlazor.Column T="IdentityUserDto" Field="@nameof(IdentityUserDto.Id)" Title="@L["Actions"]">
<CellTemplate>
<MudIconButton Icon="fas fa-user-lock"
OnClick="@(async (_) => await OpenPermissionsModalAsync(context.Item))"
Size="MudBlazor.Size.Small" />
<MudIconButton Icon="fas fa-list"
OnClick="@(async (_) => await OpenSessionsAsync(context.Item))"
Size="MudBlazor.Size.Small" />
<MudIconButton Icon="fas fa-eye"
OnClick="@(async (_) => await OpenViewDetailsAsync(context.Item))"
Size="MudBlazor.Size.Small" />
</CellTemplate>
</MudBlazor.Column>
</Columns>
</MudDataGrid>
<!-- Place required modals and capture refs -->
<MudPermissionManagementModal @ref="_permissionManagementModal" />
<UserSessionsModal @ref="_sessionsModal" />
<UserViewDetailsModal @ref="_viewDetailsModal" />
And in code-behind:
private MudPermissionManagementModal _permissionManagementModal;
private UserSessionsModal _sessionsModal;
private UserViewDetailsModal _viewDetailsModal;
protected virtual async Task OpenPermissionsModalAsync(IdentityUserDto entity)
{
await _permissionManagementModal.OpenDialogAsync(PermissionProviderName, entity.Id.ToString());
}
protected virtual async Task OpenSessionsAsync(IdentityUserDto entity)
{
// Ensure _sessionsModal is not null
await _sessionsModal.OpenAsync(entity.Id);
}
protected virtual async Task OpenViewDetailsAsync(IdentityUserDto entity)
{
await _viewDetailsModal.OpenAsync(entity.Id);
}
If you replaced/overrode the default Identity Users page:
For Interactive Auto/Server:
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Apply all of the following:
A) Keep issuer clean in Angular
oAuthConfig: {
issuer: 'https://xxxxxxxx.azurewebsites.net', // NO trailing path, NO query
redirectUri: 'https://{0}.your-domain.com',
clientId: 'YourClientId',
responseType: 'code',
scope: 'offline_access YourScope',
requireHttps: true
}
If issuer already includes /.well-known/openid-configuration or includes a query, Angular’s OIDC discovery will break.
B) Pass __tenant only to the authorize request
import { AuthService, SessionStateService } from '@abp/ng.core';
import { Injectable, inject } from '@angular/core';
@Injectable({ providedIn: 'root' })
export class TenantAwareLogin {
private auth = inject(AuthService);
private session = inject(SessionStateService);
start() {
const t = this.session.getTenant();
const tenantParam = t?.id?.toString() ?? t?.name ?? null;
if (tenantParam) {
this.auth.navigateToLogin({ __tenant: tenantParam });
} else {
this.auth.navigateToLogin();
}
}
}
C) Avoid patching OAuth discovery If you patched OAuthService.startLogin or globally appended query params to all OAuth URLs, revert that. Only pass __tenant through AuthService.navigateToLogin extras so it reaches authorize, not discovery.
D) Auth Server (shared domain)
E) Quick checklist to eliminate the bad URL
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A) Angular: force AuthGuard -> authorize request to include __tenant
Example: override AuthService.navigateToLogin to append __tenant automatically:
import { Injectable, inject } from '@angular/core';
import { AuthService, SessionStateService } from '@abp/ng.core';
@Injectable({ providedIn: 'root' })
export class TenantAwareAuthService {
private auth = inject(AuthService);
private session = inject(SessionStateService);
navigateToLogin(extras?: Record<string, unknown>) {
const t = this.session.getTenant();
const tenantParam = t?.id?.toString() ?? t?.name ?? null;
const qp = { ...(extras ?? {}) };
if (tenantParam && !qp['__tenant']) {
qp['__tenant'] = tenantParam;
}
this.auth.navigateToLogin(qp);
}
}
Then register a provider so guards use your service:
import { APP_INITIALIZER, inject } from '@angular/core';
import { OAuthService } from '@abp/ng.oauth';
import { Router } from '@angular/router';
import { TenantAwareAuthService } from './tenant-aware-auth.service';
export function patchOAuthLoginRedirect() {
return () => {
const oAuth = inject(OAuthService) as any;
const tenantAuth = inject(TenantAwareAuthService);
// Patch startLogin to ensure __tenant is sent for any login attempt
const original = oAuth.startLogin?.bind(oAuth) ?? null;
if (original) {
oAuth.startLogin = (options?: any) => {
tenantAuth.navigateToLogin(options?.params);
};
}
};
}
@NgModule({
// ...
providers: [
{ provide: APP_INITIALIZER, useFactory: patchOAuthLoginRedirect, multi: true },
],
})
export class AppModule {}
Notes:
B) Environment configuration
const baseUrl = 'https://{0}.domain.com'; // same Azure app, custom domains per tenant
export const environment = {
production: true,
application: { baseUrl, name: 'MyApp' },
oAuthConfig: {
issuer: 'https://azurehosted-domain.com', // shared Auth Server
redirectUri: baseUrl, // per-tenant SPA domain
clientId: 'MyApp_App',
responseType: 'code',
scope: 'offline_access MyApp',
requireHttps: true
},
apis: {
default: { url: 'https://api.domain.com', rootNamespace: 'MyApp' }
}
};
C) Auth Server configuration (shared domain)
{
"IdentityServer": {
"Clients": {
"MyApp_App": {
"ClientId": "MyApp_App",
"ClientSecret": "1q2w3e*",
"RootUrl": "https://{0}.domain.com"
}
}
}
}
D) API/Web Host
E) Result
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Configure the flow so Angular determines the tenant from subdomain, delays auto-login until tenant is resolved, and passes the tenant to the Auth Server on navigation.
A) Angular: make the first route public and pass __tenant on login
const routes: Routes = [
{ path: '', component: HomeComponent }, // public entry, no auth guard
{ path: 'dashboard', component: DashboardComponent, canActivate: [AuthGuard] },
{ path: '**', redirectTo: '' }
];
import { AuthService, SessionStateService } from '@abp/ng.core';
import { Component, inject } from '@angular/core';
import { Router } from '@angular/router';
@Component({ selector: 'app-home', templateUrl: './home.component.html' })
export class HomeComponent {
private auth = inject(AuthService);
private session = inject(SessionStateService);
private router = inject(Router);
get hasLoggedIn() { return this.auth.isAuthenticated; }
ngOnInit() {
// If already logged in, go to dashboard; otherwise show a Login button in the template
if (this.hasLoggedIn) {
this.router.navigate(['/dashboard']);
}
}
login() {
const t = this.session.getTenant();
const tenantParam = t?.id?.toString() ?? t?.name ?? null;
// Pass __tenant only when using a shared auth domain
tenantParam
? this.auth.navigateToLogin({ __tenant: tenantParam })
: this.auth.navigateToLogin();
}
}
const baseUrl = 'https://{0}.domain.com';
export const environment = {
production: true,
application: { baseUrl, name: 'MyApp' },
oAuthConfig: {
issuer: 'https://azurehosted-domain.com', // shared Auth Server
redirectUri: baseUrl, // per-tenant SPA domain
clientId: 'MyApp_App',
responseType: 'code',
scope: 'offline_access MyApp',
requireHttps: true
},
apis: {
default: { url: 'https://api.domain.com', rootNamespace: 'MyApp' }
}
};
Notes:
B) Auth Server: shared domain, no domain resolver, allow per-tenant redirect URIs
{
"IdentityServer": {
"Clients": {
"MyApp_App": {
"ClientId": "MyApp_App",
"ClientSecret": "1q2w3e*",
"RootUrl": "https://{0}.domain.com"
}
}
}
}
C) API/Web Host: domain tenant resolver if API is tenant-qualified; otherwise none
Configure<AbpTenantResolveOptions>(options =>
{
options.AddDomainTenantResolver("{0}.api.domain.com");
});
D) Fix the redirect loop and “logging into host” symptoms
E) Summary of what to change in your case
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