是否有一种 SAX 方式来循环 OpenXML 行？

Question

我正在使用以下提供的 SAX 方法解析一个大文件： Parsing and Reading Large Excel Files with the Open XML SDK

这是我的修改版本（为简单起见只获取行号）

using (SpreadsheetDocument myDoc = SpreadsheetDocument.Open("BigFile.xlsx", true))
{
    WorkbookPart workbookPart = myDoc.WorkbookPart;
    WorksheetPart worksheetPart = workbookPart.WorksheetParts.First();

    OpenXmlReader reader = OpenXmlReader.Create(worksheetPart);
    String rowNum;
    while (reader.Read())
    {
        if (reader.ElementType == typeof(Row))
        {
            if (reader.HasAttributes)
                rowNum = reader.Attributes.First(a => a.LocalName == "r").Value
        }
    }
}

问题在于，这会循环遍历每个项目/单元格/列/whatnot，并且仅在元素类型为 Row 时才起作用。

是否有一种 SAX 方式只循环遍历行而不是工作表中的每个项目？

谢谢，

Answer 1

关键是使用阅读器的Skip()和ReadNextSibling()方法...

 using (SpreadsheetDocument myDoc = SpreadsheetDocument.Open("BigFile.xlsx", true))
 {
     WorkbookPart workbookPart = myDoc.WorkbookPart;
     WorksheetPart worksheetPart = workbookPart.WorksheetParts.First();
     OpenXmlReader reader = OpenXmlReader.Create(worksheetPart);
     String rowNum;
     while (reader.Read())
     {
         if (reader.ElementType == typeof(Row))
         {
             do
             {
                 if (reader.HasAttributes)
                     rowNum = reader.Attributes.First(a => a.LocalName == "r").Value;

             } while (reader.ReadNextSibling()); // Skip to the next row
             break; // We just looped through all the rows so no need to continue reading the worksheet
         }

         if (reader.ElementType != typeof(Worksheet)) // Dont' want to skip the contents of the worksheet
             reader.Skip(); // Skip contents of any node before finding the first row.
     }
}