Default choice and design reason
Downsides or caveats of using sequential GUIDs globally
How to replace the default with SequentialGuidGenerator via DI (ABP-idiomatic)
using Microsoft.Extensions.DependencyInjection;
using Volo.Abp;
using Volo.Abp.Guids;
public class MyModule : AbpModule
{
public override void ConfigureServices(ServiceConfigurationContext context)
{
context.Services.AddSingleton<IGuidGenerator, SequentialGuidGenerator>();
}
}
This forces the sequential implementation globally. In an ABP app with standard EF Core provider packages, this is normally unnecessary because ABP already wires SequentialGuidGenerator as the default.
Is ABP’s SequentialGuidGenerator recommended for production with large datasets and GUID PKs?
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Implement a custom provider by inheriting the built-in LeptonXStyleProvider and override only what you need (SelectedStyle, Side menu, etc.). Then register it as the ILeptonXStyleProvider.
Example (MVC, ABP v9.x):
using System.Threading.Tasks;
using Microsoft.Extensions.Options;
using Volo.Abp.DependencyInjection;
using Volo.Abp.Ui.LeptonX;
using Volo.Abp.Ui.LeptonX.Theming;
namespace Tapp.Web;
// Inherit the base provider to avoid re-implementing unrelated members
public class TappLeptonXStyleProvider : LeptonXStyleProvider, ITransientDependency
{
public TappLeptonXStyleProvider(IOptions<LeptonXThemeOptions> options)
: base(options)
{
}
// Force Light theme always
public override Task<string> GetSelectedStyleAsync()
{
return Task.FromResult(LeptonXStyleNames.Light);
}
// Optional: keep menu expanded (example)
public override Task<LeptonXSideMenuState> GetSideMenuStateAsync()
{
return Task.FromResult(LeptonXSideMenuState.Expanded);
}
}
Register it in your WebModule so it replaces the default provider:
using Microsoft.Extensions.DependencyInjection;
using Volo.Abp.Modularity;
using Volo.Abp.Ui.LeptonX.Theming;
[DependsOn(typeof(AbpAspNetCoreMvcUiLeptonXThemeModule))] // ensure LeptonX MVC module is depended
public class TappWebModule : AbpModule
{
public override void ConfigureServices(ServiceConfigurationContext context)
{
context.Services.AddTransient<ILeptonXStyleProvider, TappLeptonXStyleProvider>();
}
}
Notes:
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using Volo.Abp.Ui.Branding;
using Volo.Abp.AspNetCore.Mvc.UI.Theme.LeptonXLite; // or LeptonX, depending on your package
using Volo.Abp.AspNetCore.Mvc.UI.Theme.LeptonXLite.Bundling; // if using LeptonX Lite bundles
using Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared;
public override void ConfigureServices(ServiceConfigurationContext context)
{
Configure<LeptonXThemeOptions>(options =>
{
// Forces default style to Light
options.DefaultStyle = LeptonXThemeStyle.Light;
});
// Optional: if you have per-user style/cookie preferences lingering from development,
// you can disable reading from user settings to avoid OS/system overrides:
Configure<LeptonXThemeUiOptions>(ui =>
{
ui.AllowStyleSelectionFromClient = false;
});
}
Remove or hide the client-side theme switcher
Clear persisted client preference so testing doesn’t revert to Dark
Prevent system/OS dark preference from applying
If you still see dark colors, verify CSS order
Code-only minimal variant:
public override void ConfigureServices(ServiceConfigurationContext context)
{
Configure<LeptonXThemeOptions>(options =>
{
options.DefaultStyle = LeptonXThemeStyle.Light;
});
Configure<LeptonXThemeUiOptions>(ui =>
{
ui.AllowStyleSelectionFromClient = false;
});
}
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What’s happening
Definitive fix steps
Fully remove any previously downloaded/cached copies of the tool package to prevent a bad cache from being reused:
Force install from nuget.org only, no cache, minimal config:
If it still fails, install a specific version explicitly (this bypasses any ambiguity in service index resolution):
Verify:
Why this works
Extra checks if the problem persists
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Root cause
Fix definitively by isolating sources
Uninstall and clear caches:
Create a minimal NuGet.config that only contains nuget.org and clears inherited sources:
Install using only that config and no cache:
If you still see nuget.abp.io or any other feed in the logs, you likely have a tool manifest or a global config injecting sources. Force ignore any failing sources and specify both options:
Verify:
Clean up global configuration that injects failing sources
Notes
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What happened
Fix steps
Ensure you uninstall any previously installed ABP CLIs:
Clear all NuGet caches:
Temporarily force nuget.org as the only source while installing:
If you have a NuGet.config (global or solution-level) that adds internal/private feeds, make sure they don’t shadow nuget.org or inject a failing source as first priority. Either:
If your environment enforces authenticated private sources, add --ignore-failed-sources to bypass them for this install/update:
Verify installation:
Notes
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Why it happens
What to do
using Microsoft.Extensions.DependencyInjection;
using Volo.Abp.Modularity;
using Volo.Abp.AspNetCore.Components.Web.Theming;
[DependsOn(
typeof(Volo.Abp.LeptonX.Shared.AbpLeptonXSharedModule) // keep your existing deps
)]
public class YourWebModule : AbpModule
{
public override void ConfigureServices(ServiceConfigurationContext context)
{
// Ensure the DI can resolve your custom layout component
context.Services.AddTransient<CustomSideMenuLayout>();
// Tell the theme system to use your component as the application layout
Configure<AbpThemingOptions>(options =>
{
options.ApplicationLayout = typeof(CustomSideMenuLayout);
});
}
}
// CustomSideMenuLayout.razor
@inherits Volo.Abp.LeptonX.Shared.LeptonXTheme.Layouts.SideMenuLayout
@* your customizations here *@
If you are using multiple LeptonX layout variants (e.g., top, side), and you switch them dynamically, ensure you set ApplicationLayout accordingly (e.g., based on configuration) before first render, typically in ConfigureServices as above.
Clean and rebuild to avoid stale component resolutions:
Stop the app
Delete bin/obj of UI projects
Rebuild and run
Notes
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Root cause
Mandatory checks and fixes
Forwarded headers and cookie security behind nginx
Data Protection key ring must be shared across every server that issues or reads cookies
SameSite for all OIDC correlation/nonce and auth cookies
WebAssembly sub-app authentication for Blazor Web App
CORS and RedirectAllowedUrls
Cookie path and domain
WebSocket support (for Server interop and signalr features used during SSR/interactive server)
Place app.UseBlazorFrameworkFiles (if hosting WASM assets) before app.UseStaticFiles when applicable
Do not rely on AddAuthenticationStateSerialization to fix this
Concrete checklist you can apply now
Answers to your specific questions
Minimal code/config examples
Server (Program/Module order hints):
public override void OnApplicationInitialization(ApplicationInitializationContext context)
{
var app = context.GetApplicationBuilder();
var env = context.GetEnvironment();
if (!env.IsDevelopment())
{
app.UseForwardedHeaders(); // before auth
}
app.UseCorrelationId();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseConfiguredEndpoints();
}
Cookie settings:
services.AddAuthentication()
.AddCookie("Cookies", options =>
{
options.ExpireTimeSpan = TimeSpan.FromDays(365);
if (!env.IsDevelopment())
{
options.Cookie.SameSite = SameSiteMode.Lax;
options.Cookie.SecurePolicy = CookieSecurePolicy.Always;
options.Cookie.HttpOnly = true;
}
});
nginx (add upgrade headers if needed):
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Forwarded-Host $host;
proxy_set_header Host $host;
# For WebSockets (interactive server features)
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
WebAssembly client appsettings (points to public HTTPS origin):
{
"App": {
"SelfUrl": "https://your-public-host"
},
"AuthServer": {
"Authority": "https://your-public-host",
"ClientId": "Your_Blazor_Client",
"ResponseType": "code"
},
"RemoteServices": {
"Default": {
"BaseUrl": "https://your-public-host"
}
}
}
This response was generated by AI. If it didn’t solve your problem, feel free to post a new answer — our support team will jump in to help you soon.
This response was generated by AI. If it didn’t solve your problem, feel free to post a new answer — our support team will jump in to help you soon.
This response was generated by AI. If it didn’t solve your problem, feel free to post a new answer — our support team will jump in to help you soon.
