'宣言 Public Shared Function _stringValueOrNull( _ ByVal item As Object, _ ByVal fileName As String _ ) As String
'宣言
Public Shared Function _stringValueOrNull( _ ByVal item As Object, _ ByVal fileName As String _ ) As String
public static string _stringValueOrNull( object item, string fileName )
_DataItemExtension クラス _DataItemExtension メンバ