对XElement进行排序 [英] Sorting an XElement

问题描述

我有一个XElement，其映射如下:

I have a XElement that maps like follows:

<book>
    <author>sadfasdf</author>
    <title>asdfasdf</title>
    <year>1999</year>
</book>
<book>
    <author>asdfasdf</author>
    <title>asdfasdf</title>
    <year>1888</year>
</book>
<book>
    <author>asdfsdf</author>
    <title>asdfasdf</title>
    <year>1777</year>
</book>

如何按作者或书名或年份对书籍分类?谢谢

How can I sort the books by author or title or year? Thanks

推荐答案

您是否要按特定顺序读取(查询)数据，或者您是否真的想对数据重新排序在xml中?要按特定顺序阅读，只需使用LINQ OrderBy方法:

Do you want to read (query) the data in a specific order, or do you actually want to re-order the data in the xml? To read in a specific order, just use the LINQ OrderBy method:

    var qry = from book in el.Elements("book")
              orderby (int)book.Element("year")
              select new
              {
                  Year = (int)book.Element("year"),
                  Title = (string)book.Element("title"),
                  Author = (string)book.Element("author")
              };

(已编辑)更改xml比较棘手...也许像这样:

(edited) Changing the xml is trickier... maybe something like:

    var qry = (from book in el.Elements("book")
               orderby (int)book.Element("year")
               select book).ToArray();

    foreach (var book in qry) book.Remove();
    foreach (var book in qry) el.Add(book);

这篇关于对XElement进行排序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！