13,002
回編集
「C Sharpの基礎 - CSVファイル」の版間の差分
ナビゲーションに移動
検索に移動
→CSVファイルの書き込み : 同期処理
| 552行目: | 552行目: | ||
public class Person | public class Person | ||
{ | { | ||
[Name(" | [Name("社員番号")] | ||
public int Id { get; set; } | public int Id { get; set; } | ||
[Name(" | [Name("氏名")] | ||
public string Name { get; set; } | public string Name { get; set; } | ||
[Name(" | [Name("生年月日")] | ||
[Format(" | [Format("yyyy年MM月dd日")] | ||
public DateTime BirthDate { get; set; } | public DateTime BirthDate { get; set; } | ||
} | } | ||
| 573行目: | 573行目: | ||
var records = new List<Person> | var records = new List<Person> | ||
{ | { | ||
new Person { Id = 1, Name = " | new Person { Id = 1, Name = "山田 太郎", BirthDate = new DateTime(1980, 1, 1) }, | ||
new Person { Id = 2, Name = " | new Person { Id = 2, Name = "佐藤 花子", BirthDate = new DateTime(1985, 5, 15) }, | ||
new Person { Id = 3, Name = " | new Person { Id = 3, Name = "鈴木 一郎", BirthDate = new DateTime(1990, 12, 31) } | ||
}; | }; | ||
| 587行目: | 587行目: | ||
using (var csv = new CsvWriter(writer, config)) | using (var csv = new CsvWriter(writer, config)) | ||
{ | { | ||
// DateTimeコンバータを追加して、日付を日本語形式で出力 | |||
csv.Context.TypeConverterCache.AddConverter<DateTime>(new CustomDateTimeConverter()); | csv.Context.TypeConverterCache.AddConverter<DateTime>(new CustomDateTimeConverter()); | ||
csv.WriteRecords(records); | csv.WriteRecords(records); | ||
| 593行目: | 594行目: | ||
} | } | ||
// DateTimeConverterを拡張して、日付を"yyyy年MM月dd日"形式で出力するカスタムコンバータを定義 | |||
public class CustomDateTimeConverter : CsvHelper.TypeConversion.DateTimeConverter | public class CustomDateTimeConverter : CsvHelper.TypeConversion.DateTimeConverter | ||
{ | { | ||
| 599行目: | 601行目: | ||
if (value is DateTime dateTime) | if (value is DateTime dateTime) | ||
{ | { | ||
return dateTime.ToString(" | return dateTime.ToString("yyyy年MM月dd日"); | ||
} | } | ||