# Host event registration with ASP.NET Core: data exports

Deploy a event registration built with ASP.NET Core on Ample using the generated downloads pattern. Compute runs the app in an isolated microVM behind a public HTTPS URL, a managed PostgreSQL 16 database is auto-provisioned and injected as DATABASE_URL, a private S3-compatible bucket holds objects with credentials delivered as encrypted environment variables. Verified on ASP.NET Core: an export query rendered to a CSV artifact stored with metadata in a private bucket and returned only to an authorized caller (401 without token, export=ok rows=3). Not separately tested: your export formats, retention policy and entitlement model; treat the event registration-specific behavior as your application code.

## Representative Queries
- Host event registration with ASP.NET Core: data exports
- Where can I host Event registration built with ASP.NET Core?
- I need a scoped export format, artifact generation and authorized download procedure.

## Resource Requirements
- primitive:compute
- primitive:postgres
- primitive:s3-compatible-object-storage

## Infrastructure Requirements
- **Compute**: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.
- **Postgres**: Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.
- **S3-compatible object storage**: Buckets are S3-compatible with issued credentials; PutObject and GetObject are verified by canary. Other S3 operations are not verified.

## Prerequisites
- A ASP.NET Core project that builds and starts with the documented commands (dotnet publish -c Release -o out in the builder, then dotnet .dll on the dotnet-10 template with ASPNETCORE_URLS bound to PORT)
- A PostgreSQL driver reading DATABASE_URL at runtime (auto-provisioned when omitted, or supplied with --env)
- A bucket from `ample bucket create` with its credentials passed as encrypted S3_* environment variables
- An Ample account token with servers:write, databases:read, buckets:read

## Workflow Steps
1. **Build and start**: `dotnet publish -c Release -o out` in the builder, then `dotnet .dll` on the dotnet-10 template with ASPNETCORE_URLS bound to PORT. The server must bind 0.0.0.0 on PORT.
2. **Implement the pattern on PostgreSQL**: The fixture's module implements generated downloads: an export query rendered to a CSV artifact stored with metadata in a private bucket and returned only to an authorized caller (401 without token, export=ok rows=3). Copy the approach into your schema; keep migrations idempotent and run them with --release-command.
3. **Wire object storage**: Create the bucket(s), then pass endpoint, region, bucket and keys as --env values. Use path-style addressing. Keep private data in an unpublished bucket.
4. **Deploy**: Run the synchronous deploy once and read the result (exit 0 live, 1 failed, 2 blocked). Re-running with no change is a no-op.
   - Command: `ample deploy . --name  --public --env S3_ENDPOINT=... --env S3_REGION=... --env S3_BUCKET=... --env S3_ACCESS_KEY_ID=... --env S3_SECRET_ACCESS_KEY=...`
5. **Verify**: Fetch the live URL and the pattern self-test route(s) (/p/generated-downloads) from the example; then run your own checks. On failure read `ample logs  --kind build` then `--kind runtime`.
   - Command: `ample logs  --kind build`

## Examples
- **Title**: ASP.NET Core pattern fixture
 - **Description**: Multi-pattern ASP.NET Core app whose generated downloads module was checked live; the module is under tests/deploy-canaries/_pattern-modules.
 - **Source Ref**: tests/deploy-canaries/asp-net-core-patterns

## Success Checks
- App responds on its public URL (expect: ample canary asp net core patterns)
- Generated-downloads self-test (expect: export=ok rows=3 with ?token=...; 401 without)

## Limitations
- Verified on the dotnet-10 template at s-1vcpu-1gb with the example fixture; other sizes, templates and ASP.NET Core major versions are not verified.
- The event registration itself (your export formats, retention policy and entitlement model) is application code and was not separately tested; the pattern checks are what was verified.
- Other notes on app behavior and specifications.

## Cost Estimate
- **Currency**: USD
- **Monthly Amount**: 10.0
- **Basis**: Size prices from pricing.toml at build revision 1ac5595375130d45290090e82ed0f554ccd45405-dirty.
- **Components**:
  - App server, size: s-1vcpu-1gb, monthly amount: 5.0
  - Managed PostgreSQL database, size: s-1vcpu-1gb, monthly amount: 5.0

## Evidence Summary
- **Canary Run**: ASP.NET Core pattern fixture deployed on Ample.
  - Summary: Checks passed for generated-downloads and configuration-secrets.
  - Observed At: 2026-09-21T01:15:54Z
  - Expires At: 2027-03-20T01:15:54Z

## Next Actions
- **Action**: Browse the catalog index
- **Operation ID**: catalog_index
- **Method**: GET
- **Relative Path**: /v1/catalog

- **Action**: Search published recipes by intent, stack and constraints
- **Operation ID**: search_recipes
- **Method**: POST
- **Relative Path**: /v1/catalog/search