HL7 Parser

A Windows desktop application for parsing, viewing, and analyzing HL7 (Health Level 7) messages. Built with WPF and .NET Framework 4.0.

Features

Message Editor

• Open and save HL7 message files (.hl7)
• Edit HL7 messages with a built-in text editor
• Parse messages directly from the editor

Message Parser

• Parses HL7 v2.x messages into a hierarchical tree view
• Breaks down messages into segments, fields, and components
• Displays field IDs, names, content, and descriptions
• Supports HL7-defined separators and encoding characters

Data Source Browser

• Browse HL7 segment and field definitions
• Supports HL7 v2.3 and v2.5 data dictionaries
• Search/filter fields by segment name or description

Network Sniffer

• Capture live network traffic on a selected interface
• Decode IP, TCP, UDP, ICMP, and DNS packets
• Filter captured packets by protocol
• Save packet captures for later analysis
• Requires administrator privileges

Requirements

• Windows OS
• .NET Framework 4.0 (Client Profile)
• Administrator privileges (for the Network Sniffer feature)

Building

Open HL7Parser.csproj in Visual Studio and build the solution. The project targets x86 platform.

Usage

1. Editor Tab - Paste or open an HL7 message, then click the Parse button to analyze it.
2. Parser Tab - View the parsed message as an expandable tree structure with field-level detail.
3. Data Source Tab - Select an HL7 version and browse the segment/field dictionary. Use the search box to filter.
4. Network Snoop Tab - Select a network interface, start capture, and view live TCP/UDP traffic (requires admin).

Project Structure

HL7Parser/
├── Controls/           # Custom WPF user controls (SnoopControl, XmlViewer)
├── Data/
│   ├── Dictionary/     # HL7 field definitions and lookup
│   └── HL7/            # HL7 message parsing (Message, Segment, Field, Component)
├── DataSources/        # HL7 v2.3 and v2.5 segment definition XML files
├── Extensions/         # IEnumerable extension methods
├── Helpers/            # RelayCommand, EnumHelper utilities
├── Images/             # Toolbar and UI icons
├── Network/            # Packet capture and protocol decoding
│   └── Decodes/        # Protocol decoders (IP, TCP, UDP, ICMP, DNS)
├── ViewModels/         # MVVM view models
├── MainWindow.xaml     # Main application window
└── HL7Parser.csproj    # Project file

License

All rights reserved.