Aws-sdk-net: DateTime은 DocumentModel을 사용한 왕복 직렬화를 지원하지 않습니다.

DocumentModel Primitive는 왕복 직렬화를 제대로 지원하지 않습니다. 시간대와 밀리초가 올바르게 유지되도록 DateTime을 직렬화할 때 형식 지정자 "o"를 사용해야 합니다.

DateTime 및 NullableDateTime에 대한 올바른 직렬화를 설명하기 위해 아래에 IPropertyConverter를 만들었습니다.

using Amazon.DynamoDBv2.DataModel;
using Amazon.DynamoDBv2.DocumentModel;
using System.Globalization;

/// <summary>
/// The <see cref="IPropertyConverter"/> to properly support round-trip serialization of <see cref="DateTime"/>.
/// </summary>
public class RoundTripNullableDateTimeTypeConverter : IPropertyConverter
{
    /// <summary>
    /// Converts the <c>value</c> to a <see cref="Primitive"/>.
    /// </summary>
    /// <param name="value">The value to convert.</param>
    /// <returns>The primitive of the <c>value</c>.</returns>
    public DynamoDBEntry ToEntry(object value)
    {
        var date = value as DateTime?;
        return new Primitive 
        {
            Value = date.HasValue ? date.Value.ToString("o", CultureInfo.InvariantCulture) : null
        };
    }

    /// <summary>
    /// Converts the <c>entry</c> to <see cref="DateTime"/>.
    /// </summary>
    /// <param name="entry">The entry to convert.</param>
    /// <returns>The date time of the entry.</returns>
    public object FromEntry(DynamoDBEntry entry)
    {
        var entryString = entry.AsString();
        if (string.IsNullOrEmpty(entryString))
            return null;
        else
            return DateTime.ParseExact(entryString, "o", CultureInfo.InvariantCulture, DateTimeStyles.RoundtripKind);
    }
}

/// <summary>
/// The <see cref="IPropertyConverter"/> to properly support round-trip serialization of <see cref="DateTime"/>.
/// </summary>
public class RoundTripDateTimeTypeConverter : IPropertyConverter
{
    /// <summary>
    /// Converts the <c>value</c> to a <see cref="Primitive"/>.
    /// </summary>
    /// <param name="value">The value to convert.</param>
    /// <returns>The primitive of the <c>value</c>.</returns>
    public DynamoDBEntry ToEntry(object value)
    {
        return new Primitive
        {
            Value = ((DateTime)value).ToString("o", CultureInfo.InvariantCulture)
        };
    }

    /// <summary>
    /// Converts the <c>entry</c> to <see cref="DateTime"/>.
    /// </summary>
    /// <param name="entry">The entry to convert.</param>
    /// <returns>The date time of the entry.</returns>
    public object FromEntry(DynamoDBEntry entry)
    {
        return DateTime.ParseExact(entry.AsString(), "o", CultureInfo.InvariantCulture, DateTimeStyles.RoundtripKind);
    }
}

몇 가지 중요한 참조:

• 표준 날짜 및 시간 형식 문자열
• DateTime은 ToUniversalTime 및 ToLocalTime과 관련하여 왕복합니까?