Dapper working with DateOnly and TimeOnly

Dapper does not natively know how to work with DateOnly and TimeOnly but by using a class which implements SqlMapper.TypeHandler using DateOnly and TimeOnly is possible.

Add these classes to your project.

Code:

---

public class SqlDateOnlyTypeHandler : SqlMapper.TypeHandler<DateOnly>
{
    public override void SetValue(IDbDataParameter parameter, DateOnly date)
        => parameter.Value = date.ToDateTime(new TimeOnly(0, 0));

    public override DateOnly Parse(object value)
        => DateOnly.FromDateTime((DateTime)value);
}

public class SqlTimeOnlyTypeHandler : SqlMapper.TypeHandler<TimeOnly>
{
    public override void SetValue(IDbDataParameter parameter, TimeOnly time)
    {
        parameter.Value = time.ToString();
    }

    public override TimeOnly Parse(object value) => TimeOnly.FromTimeSpan((TimeSpan)value);
}

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Usage

To use either one, before interacting with data with Dapper call one or both, here its done in a class constructor.

Code:

---

public DapperOperations()
{
    SqlMapper.AddTypeHandler(new SqlDateOnlyTypeHandler());
    SqlMapper.AddTypeHandler(new SqlTimeOnlyTypeHandler());
}

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Alternate, add the following NuGet package kp.Dapper.Handlers and in the GitHub repository there are samples.

Tested with SQL-Server and SQLite