---
source_files:
  - Common/DTS.Common/Interface/DownloadEvent/IDownloadEvent.cs
generated_at: "2026-04-17T16:10:17.621281+00:00"
model: "zai-org/GLM-5-FP8"
schema_version: 1
sha256: "54b69dae98e15350"
---

# DownloadEvent

### Purpose
This module defines `IDownloadEvent`, an interface representing a download event within the DTS system. It appears to be related to "Multiple download event" functionality (per FB 6399 reference) and provides a data-bound model for event configuration, including event identification, timing/length information, and associated test/DTS file references. The interface inherits from `INotifyPropertyChanged`, indicating it is designed for data binding in UI scenarios.

### Public Interface

**`IDownloadEvent`** (inherits `INotifyPropertyChanged`)

| Member | Type | Description |
|--------|------|-------------|
| `EventNumber` | `int` | Gets or sets the numeric identifier for the download event. |
| `EventNumberDisplay` | `string` | Gets or sets the display string for the event number. |
| `IsEnabled` | `bool` | Gets or sets whether the event is enabled. |
| `IsReadonly` | `bool` | Gets or sets whether the event is read-only. |
| `IsDefault` | `bool` | Gets whether this event is the default. (Read-only property) |
| `EventLength` | `TimeSpan` | Gets or sets the total length available for the download event. |
| `ShouldDisplayLength` | `bool` | Gets or sets whether the event length should be displayed in the UI. |
| `TestItem` | `string` | Gets or sets the test item identifier. |
| `DTSFile` | `string` | Gets or sets the associated DTS file reference. |

### Invariants
- `IsDefault` is a read-only property; implementers must provide logic to determine default status.
- All properties except `IsDefault` are read/write.
- Implementers must implement `INotifyPropertyChanged` to support UI data binding.

### Dependencies
- **Depends on**: `System`, `System.ComponentModel` (for `INotifyPropertyChanged`).
- **Depended on by**: Cannot be determined from source alone.

### Gotchas
- The comment references "FB 6399" which appears to be a feature/bug tracking identifier; the context of this reference is not available in source.
- The distinction between `EventNumber` (int) and `EventNumberDisplay` (string) suggests formatting or localization requirements that are not specified in the interface.

---