Handlers · 2 min read

FirebirdZonedDateTimeToDateTimeOffsetPropertyHandler

A property handler that maps the Firebird TIMESTAMP WITH TIME ZONE type into a DateTimeOffset property.

A property handler that maps the Firebird TIMESTAMP WITH TIME ZONE type into a DateTimeOffset property. The UTC offset is kept, but the name of the time zone is not.

A DateTimeOffset keeps the UTC offset, but it cannot hold the name of the time zone (for example America/New_York). Use an FbZonedDateTime property when the time zone name matters.

Overview

Name	Description
Class	`FirebirdZonedDateTimeToDateTimeOffsetPropertyHandler`
Namespace	`RepoDb.PropertyHandlers.Firebird`
Package	RepoDb.Firebird
Implements	IPropertyHandler`<object, DateTimeOffset>`
Column type	The Firebird `TIMESTAMP WITH TIME ZONE` type
Property type	`DateTimeOffset`

Conversions

Method	Direction	Description
Get	Database to property	Converts the value returned by the driver (a `DateTimeOffset` or an `FbZonedDateTime`) into a `DateTimeOffset` holding the local value and the UTC offset of the time zone. `null` and `DBNull` are returned as `default`.
Set	Property to database	Passes the `DateTimeOffset` to the driver, which binds it as a `TIMESTAMP WITH TIME ZONE` value.

Exceptions

Exception	Thrown When
`InvalidOperationException`	The UTC offset of the time zone cannot be determined.
`ArgumentException`	The type of the value returned by the driver is not supported.

Usability

Bind the handler to the property that maps to a TIMESTAMP WITH TIME ZONE column.

Attribute

public class Appointment
{
    public int Id { get; set; }

    [Map("starts_at"), PropertyHandler(typeof(FirebirdZonedDateTimeToDateTimeOffsetPropertyHandler))]
    public DateTimeOffset StartsAt { get; set; }
}

Once bound, the library invokes the handler automatically when the property is read or written.

using (var connection = new FbConnection(connectionString))
{
    connection.Insert(new Appointment { Id = 1, StartsAt = new DateTimeOffset(2026, 9, 20, 14, 30, 0, TimeSpan.FromHours(2)) });
    var appointment = connection.Query<Appointment>(e => e.Id == 1).First();
    // appointment.StartsAt keeps the +02:00 offset
}

Fluent Mapping

To configure via FluentMapper:

FluentMapper
    .Entity<Appointment>()
    .PropertyHandler<FirebirdZonedDateTimeToDateTimeOffsetPropertyHandler>(e => e.StartsAt);

Property Level Mapping

To configure via PropertyHandlerMapper:

PropertyHandlerMapper.Add<Appointment, FirebirdZonedDateTimeToDateTimeOffsetPropertyHandler>(e => e.StartsAt, new FirebirdZonedDateTimeToDateTimeOffsetPropertyHandler(), true);

Type Level Mapping

To apply the handler to every property of the type DateTimeOffset:

PropertyHandlerMapper.Add<DateTimeOffset, FirebirdZonedDateTimeToDateTimeOffsetPropertyHandler>(new FirebirdZonedDateTimeToDateTimeOffsetPropertyHandler(), true);

A type level mapping is process-wide: it is applied to every DateTimeOffset property of every entity and connection, not only to the intended column. Prefer the attribute, fluent or property level mapping unless every DateTimeOffset property maps to a TIMESTAMP WITH TIME ZONE column.