IPOI操作word的帮助类
///
/// 创建文档
///
///
public static void ExportDocument(DocumentSetting setting)
///
/// 设置文档
///
public class DocumentSetting
///
/// 文档内容相关
///
public class ContentItemSetting
///
/// 纸张类型
///
public enum PaperType
///
/// 获取纸张大小,单位:Twip
/// 换算关系:1英寸=1440缇 1厘米=567缇 1磅=20缇 1像素=15缇
///
///
///
private static Tuple
GetPaperSize(PaperType type)