---
source_files:
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/AbstractOLEDbWrapper.cs
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/TemplateZone.cs
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/TestObjectChannel.cs
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/CalculatedValueClass.cs
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/HardwareChannel.cs
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/TemplateRegion.cs
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/LevelTriggerChannel.cs
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/MMEFigures.cs
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/TestSetting.cs
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/TestEngineerDetails.cs
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/TestObjectMetaData.cs
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/IsoCode.cs
  - DataPRO/Modules/PreviousDBVersions/Version57/DatabaseExport/ISO/CustomerDetails.cs
generated_at: "2026-04-17T15:45:10.285441+00:00"
model: "zai-org/GLM-5-FP8"
schema_version: 1
sha256: "82e99bbb3ec2255d"
---

# Documentation: DatabaseExport (Version 57 - ISO Module)

## 1. Purpose
This module provides a data access and entity modeling layer for a crash test data acquisition system, specifically handling "Version 57" database schemas. It contains classes responsible for mapping database rows (`System.Data.DataRow`) to C# objects representing test configurations, hardware channels, templates, and metadata. The module supports exporting and managing ISO-compliant data structures, including test objects, calculated channels, and trigger configurations.

## 2. Public Interface

### AbstractOLEDbWrapper
Abstract class providing static helper methods for safe database value retrieval.
*   `public static long GetLong(IDataReader reader, string field)`: Returns `long.MinValue` if the database field is `DBNull`, otherwise converts the value to `Int64`.
*   `public static DateTime GetDate(IDataReader reader, string field)`: Returns `DateTime.MinValue` if the database field is `DBNull`, otherwise casts the value to `DateTime`.

### TemplateZone
Represents a zone within a test template.
*   `public TemplateZone(string template, string name, string picture, string description)`: Constructor initializing properties directly.
*   `public TemplateZone(System.Data.DataRow dr)`: Constructor populating fields from a database row. Sets `ZoneName` to "Default zone" if null. Automatically loads `TemplateRegions` via `TemplateRegion.GetAllRegions`.
*   `public TemplateRegion[] TemplateRegions { get; set; }`: Array of regions belonging to this zone.

### TemplateRegion
Represents a specific region within a `TemplateZone`, including coordinate data.
*   `public TemplateRegion(DataRow dr)`: Constructor mapping database columns (e.g., `UpperLeftX`, `RegionName`) to properties.
*   `internal static TemplateRegion[] GetAllRegions(string templateName, string zoneName)`: Queries the database (`tblTemplateRegions`) to retrieve all regions for a specific template and zone. Silently catches exceptions and returns an empty array on failure.

### TestObjectChannel
Represents a specific data channel on a test object. Inherits from `TestObjectTemplateChannel` (not shown) and implements `IComparable<TestObjectChannel>`.
*   `public enum SquibChannelTypes`: Defines channel types (`None`, `Voltage`, `Current`).
*   `public string GetGraphID()`: Returns the channel ID, appending `"_CU"` if `SquibChannelType` is `Current`.
*   `public string GetId()`: Returns a formatted ID string (`SerialNumber_MMEChannelType_Id`).
*   `public string GetID()`: Functionally identical to `GetId()` but uses `string.Format` instead of interpolation.
*   `public int CompareTo(TestObjectChannel right)`: Compares by `DisplayOrder`, then `Name`, then `TestObject.SerialNumberOrOriginalSerialNumber`.
*   `public string HardwareId { set; }`: Setter parses the input string expecting an underscore-delimited format (3 tokens) and reconstructs the value based on specific token logic involving `ChannelSeparator`.

### CalculatedValueClass
Defines a calculated channel derived from other input channels.
*   `public enum Operations`: Defines calculation types (`SUM`, `AVERAGE`, `IRTRACC3D`, etc.).
*   `public CalculatedValueClass(System.Data.DataRow dr)`: Constructor mapping database fields to properties using `DbOperations.CalculatedChannels.Fields` enum.
*   `public byte[] InputChannelIdsBlob { get; set; }`: Serializes/deserializes the `InputChannelIds` list to/from a UTF-8 encoded string separated by the system's list separator.

### ISOHardwareChannel
Represents a physical hardware channel configuration.
*   `public ISOHardwareChannel(DataRow dr, Hardware hardware)`: Constructor mapping `DbOperations.DAS.DASChannelFields` to properties. Throws `NotSupportedException` for unknown fields.
*   `public static int PhysicalCompare(ISOHardwareChannel left, ISOHardwareChannel right)`: Compares two channels by `ChannelIdx`.

### LevelTriggerChannel
Stores trigger configuration based on signal levels.
*   `public LevelTriggerChannel(System.Data.DataRow dr)`: Constructor mapping `DbOperations.LevelTriggers.Fields` to properties.
*   Properties include thresholds: `GreaterThanThresholdEU`, `LessThanThresholdEU`, `InsideUpperLevelEU`, etc.

### MMEFigures
Represents figure metadata, inheriting from `AbstractOLEDbWrapper`.
*   `public static MMEFigures[] GetFigures()`: Static factory method querying the `MMEFIGURES` table via `DbOperations.GetISOCommand()`. Returns an array of populated `MMEFigures` objects.

### TestSetting & TestSettingDictionary
Classes for managing key-value test settings with serialization support.
*   `public string TestSetting.ToSerializeString()`: Serializes the setting to "Key=Value" format, escaping internal equals signs with `"_x_"`.
*   `public static bool TestSetting.TryParse(string s, out TestSetting ts)`: Parses a serialized string back into a `TestSetting` object.
*   `public void TestSettingDictionary.LoadSettings(string s)`: Parses a serialized string (separated by system list separator) and populates the dictionary.
*   `public string TestSettingDictionary.ToSerializeString()`: Serializes all settings in the dictionary.

### TestEngineerDetails & CustomerDetails
Serializable classes holding contact details.
*   `public Dictionary<string, string> GetValues()`: Returns a dictionary of all fields and their values (used for serialization/database storage).
*   `public static TestEngineerDetails[] GetAllTestEngineerDetails()`: Fetches all records from `tblTestEngineerDetails`.
*   `public static CustomerDetails[] GetAllCustomerDetails()`: Fetches all records from `tblCustomerDetails`.

### TestObjectMetaData & TestSetupMetaData
Manage metadata properties using a dictionary backing field.
*   `public void SetProperty(MetaData meta)`: Adds or updates a metadata property.
*   `public MetaData[] Properties { get; }`: Returns all metadata properties as an array.

### IsoCode
Handles the construction and parsing of a 16-character ISO code string.
*   `public IsoCode(string isoCode)`: Constructor. Pads or truncates input to exactly 16 characters.
*   `public string StringRepresentation { get; set; }`: Gets or sets the 16-char code.
*   `public static string GetString(...)`: Overloaded static methods to construct an ISO code from various components (`MMEPossibleChannels`, `MMETestObjects`, etc.).

## 3. Invariants

1.  **IsoCode Length**: An `IsoCode` string representation is always exactly 16 characters. Inputs are padded with `'?'` or truncated to enforce this.
2.  **ChannelIDX Default**: The default value for `TestObjectChannel._channelIDX` is `CHANNEL_IDX_UNKNOWN` (-1).
3.  **DBNull Handling**: Database readers/constructors in this module consistently convert `DBNull.Value` to specific default values (e.g., `long.MinValue`, `DateTime.MinValue`, "NOVALUE", or "Default zone") rather than throwing exceptions or leaving values null.
4.  **Comparison Logic**: `TestObjectChannel.CompareTo` guarantees a stable sort order based on `DisplayOrder` -> `Name` -> `SerialNumber`.
5.  **HardwareId Parsing**: The `TestObjectChannel.HardwareId` setter expects an underscore-delimited string with exactly 3 tokens to perform its parsing logic; otherwise, it passes the value through (or null) to `SetProperty`.

## 4. Dependencies

**Internal Dependencies (Inferred from source)**:
*   `DbOperations`: Used extensively for database connections, commands, and parameter creation (`GetCommand`, `GetISOCommand`, `CreateParam`, `Connection.QueryDataSet`).
*   `DatabaseExport.ISO.TestObject`: Referenced in `TestObjectChannel`.
*   `DatabaseExport.ISO.TestObjectTemplateChannel`: Base class for `TestObjectChannel`.
*   `DatabaseExport.Hardware`: Referenced in `ISOHardwareChannel`.
*   `MMEPossibleChannels`, `MMETestObjects`, `MMEPositions`, `MMEFilterClasses`: Referenced in `IsoCode.GetString` static methods.

**External Dependencies**:
*   `System.Data` / `System.Data.OleDb`: Used for database interaction.
*   `System.Drawing`: Used in `TemplateRegion` for `Point` objects.
*   `System.Globalization`: Used for culture-invariant string parsing/serialization.

## 5. Gotchas

1.  **Bug in MMEFigures.GetFigures**: In the `GetFigures()` method, when reading the `LAST_CHANGE` column, the code incorrectly assigns the value to the `datRevision` variable instead of `lastChange`. This means `Last_Change` in the resulting object will likely be `DateTime.MinValue`, and `DatRevision` may contain the