/// <summary>
/// 設定されているカラム情報を使って、結果オブジェクトを作成。
/// </summary>
/// <param name="headers"></param>
/// <param name="lines"></param>
/// <returns></returns>
IEnumerable <T> CreateObjects(IEnumerable <string> headers, IList <IEnumerable <string> > lines)
{
headers = headers ?? this.CreateHeaders();
var result = new List <T>();
foreach (var values in lines)
{
var item = new T();
for (var i = 0; i < headers.Count(); i++)
{
var header = headers.ElementAt(i);
var column = this._columns.Where(x => x.ColumnName == header).SingleOrDefault();
if (column == null)
{
continue;
}
var value = column.IsConstantValue ? column.ConstantValue : values.ElementAt(i);
if (string.IsNullOrEmpty(value))
{
continue;
}
object current = item;
var propertyChain = ExpressionUtil.GetPropertyChain(column.Property).Reverse();
for (var j = 0; j < propertyChain.Count() - 1; j++)
{
var chainItem = propertyChain.ElementAt(j);
var cValue = chainItem.Value.GetValue(current) ?? Activator.CreateInstance(chainItem.Value.PropertyType);
chainItem.Value.SetValue(current, cValue);
current = cValue;
}
var lastItem = propertyChain.Last();
if (column.Converter != null)
{
lastItem.Value.SetValue(current, column.Converter.CsvToObject(value));
}
else
{
lastItem.Value.SetValue(current, lastItem.Value.Converter.ConvertFrom(value));
}
}
result.Add(item);
}
return(result);
}
/// <summary>
/// CSVファイルにエクスポート。
/// </summary>
/// <param name="source">エクスポートを行うオブジェクトのリスト</param>
/// <param name="filePath">ファイルパス</param>
/// <param name="encoding">ファイルのエンコード(既定はUTF-8)</param>
public void Export(IEnumerable <T> source, string filePath, Encoding encoding = null)
{
var result = new List <string>();
var delimiter = string.IsNullOrEmpty(this.Delimiter) ? DEFAULT_DELIMITER : this.Delimiter;
if (this.IsContainHeader)
{
result.Add(this.CreateHeader(delimiter));
}
foreach (var item in source)
{
var values = new List <string>();
foreach (var column in this._columns)
{
if (column.IsConstantValue)
{
values.Add(column.ConstantValue);
}
else
{
var propertyChain = ExpressionUtil.GetPropertyChain(column.Property);
object value = item;
foreach (var chainItem in propertyChain.Reverse())
{
value = chainItem.Value.GetValue(value);
}
if (column.Converter != null)
{
values.Add(column.Converter.ObjectToCsv(value));
}
else
{
values.Add(value != null ? value.ToString() : string.Empty);
}
}
}
result.Add(string.Join(delimiter, values));
}
encoding = encoding ?? Encoding.UTF8;
File.WriteAllLines(filePath, result, encoding);
}