public static void OAndRFormatsTest()
{
DateOnly dateOnly = DateOnly.FromDateTime(DateTime.Today);
string formattedDate = dateOnly.ToString("o");
Assert.Equal(10, formattedDate.Length);
Assert.Equal('-', formattedDate[4]);
Assert.Equal('-', formattedDate[7]);
DateOnly parsedDateOnly = DateOnly.Parse(formattedDate);
Assert.Equal(dateOnly, parsedDateOnly);
parsedDateOnly = DateOnly.Parse(formattedDate.AsSpan());
Assert.Equal(dateOnly, parsedDateOnly);
parsedDateOnly = DateOnly.ParseExact(formattedDate, "O");
Assert.Equal(dateOnly, parsedDateOnly);
parsedDateOnly = DateOnly.ParseExact(formattedDate.AsSpan(), "O".AsSpan());
Assert.Equal(dateOnly, parsedDateOnly);
formattedDate = dateOnly.ToString("r");
Assert.Equal(16, formattedDate.Length);
Assert.Equal(',', formattedDate[3]);
Assert.Equal(' ', formattedDate[4]);
Assert.Equal(' ', formattedDate[7]);
Assert.Equal(' ', formattedDate[11]);
parsedDateOnly = DateOnly.Parse(formattedDate);
Assert.Equal(dateOnly, parsedDateOnly);
parsedDateOnly = DateOnly.Parse(formattedDate.AsSpan());
Assert.Equal(dateOnly, parsedDateOnly);
parsedDateOnly = DateOnly.ParseExact(formattedDate, "R");
Assert.Equal(dateOnly, parsedDateOnly);
parsedDateOnly = DateOnly.ParseExact(formattedDate.AsSpan(), "R".AsSpan());
Assert.Equal(dateOnly, parsedDateOnly);
}
public override DateOnly?ReadJson(JsonReader reader, Type objectType, DateOnly?existingValue, bool hasExistingValue, JsonSerializer serializer)
{
if (reader.Value == null)
{
return(null);
}
if (reader.Value.GetType() == typeof(string))
{
Regex dateOnlyRegex = new(@"\d{4}-\d{1,2}-\d{1,2}");
Match match = dateOnlyRegex.Match((string)reader.Value);
if (match.Success && match.Groups.Count == 1)
{
return(DateOnly.ParseExact(match.Groups[0].Value, DateFormat, CultureInfo.InvariantCulture));
}
}
if (reader.Value.GetType() == typeof(DateTime))
{
return(DateOnly.FromDateTime((DateTime)reader.Value));
}
return(null);
}
public override DateOnly?Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
var value = reader.GetString();
if (string.IsNullOrEmpty(value))
{
return(null);
}
return(DateOnly.ParseExact(value, DateFormat, CultureInfo.InvariantCulture));
}
/// <summary>
/// Converts the string to an object.
/// </summary>
/// <param name="text">The string to convert to an object.</param>
/// <param name="row">The <see cref="IReaderRow"/> for the current record.</param>
/// <param name="memberMapData">The <see cref="MemberMapData"/> for the member being created.</param>
/// <returns>The object created from the string.</returns>
public override object ConvertFromString(string text, IReaderRow row, MemberMapData memberMapData)
{
if (text == null)
{
return(base.ConvertFromString(null, row, memberMapData));
}
var formatProvider = (IFormatProvider)memberMapData.TypeConverterOptions.CultureInfo.GetFormat(typeof(DateTimeFormatInfo)) ?? memberMapData.TypeConverterOptions.CultureInfo;
var dateTimeStyle = memberMapData.TypeConverterOptions.DateTimeStyle ?? DateTimeStyles.None;
return(memberMapData.TypeConverterOptions.Formats == null || memberMapData.TypeConverterOptions.Formats.Length == 0
? DateOnly.Parse(text, formatProvider, dateTimeStyle)
: DateOnly.ParseExact(text, memberMapData.TypeConverterOptions.Formats, formatProvider, dateTimeStyle));
}
public static void AllCulturesTest()
{
DateOnly dateOnly = DateOnly.FromDateTime(DateTime.Today);
foreach (CultureInfo ci in CultureInfo.GetCultures(CultureTypes.SpecificCultures))
{
string formatted = dateOnly.ToString("d", ci);
DateOnly parsedDateOnly = DateOnly.ParseExact(formatted, "d", ci);
Assert.Equal(dateOnly, parsedDateOnly);
formatted = dateOnly.ToString("D", ci);
parsedDateOnly = DateOnly.ParseExact(formatted, "D", ci);
Assert.Equal(dateOnly, parsedDateOnly);
}
}
public static void CustomFormattingTest()
{
DateOnly dateOnly = DateOnly.FromDateTime(DateTime.Today);
string format = "dd, ddd 'dash' MMMM \"dash\" yyyy";
string formatted = dateOnly.ToString(format);
DateOnly parsedDateOnly = DateOnly.ParseExact(formatted, format);
Assert.Equal(dateOnly, parsedDateOnly);
parsedDateOnly = DateOnly.ParseExact(formatted.AsSpan(), format.AsSpan());
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Throws <FormatException>(() => dateOnly.ToString("dd-MM-yyyy hh"));
Assert.Throws <FormatException>(() => dateOnly.ToString("dd-MM-yyyy m"));
Assert.Throws <FormatException>(() => dateOnly.ToString("dd-MM-yyyy s"));
Assert.Throws <FormatException>(() => dateOnly.ToString("dd-MM-yyyy z"));
}
public static void FormatParseTest()
{
string[] patterns = new string[] { CultureInfo.CurrentCulture.DateTimeFormat.ShortDatePattern, CultureInfo.CurrentCulture.DateTimeFormat.LongDatePattern, "d", "D", "o", "r" };
DateOnly dateOnly = DateOnly.FromDateTime(DateTime.Today);
foreach (string format in patterns)
{
string formattedDate = dateOnly.ToString(format);
DateOnly parsedDateOnly = DateOnly.Parse(formattedDate);
Assert.True(DateOnly.TryParse(formattedDate, out DateOnly parsedDateOnly1));
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Equal(dateOnly, parsedDateOnly1);
parsedDateOnly = DateOnly.Parse(formattedDate.AsSpan());
Assert.True(DateOnly.TryParse(formattedDate.AsSpan(), out parsedDateOnly1));
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Equal(dateOnly, parsedDateOnly1);
parsedDateOnly = DateOnly.Parse(formattedDate, CultureInfo.CurrentCulture);
Assert.True(DateOnly.TryParse(formattedDate, CultureInfo.CurrentCulture, DateTimeStyles.None, out parsedDateOnly1));
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Equal(dateOnly, parsedDateOnly1);
parsedDateOnly = DateOnly.Parse(formattedDate.AsSpan(), CultureInfo.CurrentCulture);
Assert.True(DateOnly.TryParse(formattedDate.AsSpan(), CultureInfo.CurrentCulture, DateTimeStyles.None, out parsedDateOnly1));
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Equal(dateOnly, parsedDateOnly1);
parsedDateOnly = DateOnly.ParseExact(formattedDate, format);
Assert.True(DateOnly.TryParseExact(formattedDate, format, out parsedDateOnly1));
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Equal(dateOnly, parsedDateOnly1);
parsedDateOnly = DateOnly.ParseExact(formattedDate.AsSpan(), format.AsSpan());
Assert.True(DateOnly.TryParseExact(formattedDate.AsSpan(), format.AsSpan(), out parsedDateOnly1));
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Equal(dateOnly, parsedDateOnly1);
parsedDateOnly = DateOnly.ParseExact(formattedDate, format, CultureInfo.CurrentCulture);
Assert.True(DateOnly.TryParseExact(formattedDate, format, CultureInfo.CurrentCulture, DateTimeStyles.None, out parsedDateOnly1));
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Equal(dateOnly, parsedDateOnly1);
parsedDateOnly = DateOnly.ParseExact(formattedDate.AsSpan(), format.AsSpan(), CultureInfo.CurrentCulture);
Assert.True(DateOnly.TryParseExact(formattedDate.AsSpan(), format.AsSpan(), CultureInfo.CurrentCulture, DateTimeStyles.None, out parsedDateOnly1));
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Equal(dateOnly, parsedDateOnly1);
parsedDateOnly = DateOnly.ParseExact(formattedDate, patterns);
Assert.True(DateOnly.TryParseExact(formattedDate, patterns, out parsedDateOnly1));
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Equal(dateOnly, parsedDateOnly1);
parsedDateOnly = DateOnly.ParseExact(formattedDate.AsSpan(), patterns);
Assert.True(DateOnly.TryParseExact(formattedDate.AsSpan(), patterns, out parsedDateOnly1));
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Equal(dateOnly, parsedDateOnly1);
parsedDateOnly = DateOnly.ParseExact(formattedDate, patterns, CultureInfo.CurrentCulture);
Assert.True(DateOnly.TryParseExact(formattedDate, patterns, CultureInfo.CurrentCulture, DateTimeStyles.None, out parsedDateOnly1));
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Equal(dateOnly, parsedDateOnly1);
parsedDateOnly = DateOnly.ParseExact(formattedDate.AsSpan(), patterns, CultureInfo.CurrentCulture);
Assert.True(DateOnly.TryParseExact(formattedDate.AsSpan(), patterns, CultureInfo.CurrentCulture, DateTimeStyles.None, out parsedDateOnly1));
Assert.Equal(dateOnly, parsedDateOnly);
Assert.Equal(dateOnly, parsedDateOnly1);
}
}