我正在构建一些使用Linq对象的XML,并使用类似于以下示例的代码设法获得我想要的内容。我不禁觉得它可能会更好。真正困扰我的是“插图”节点,我必须将该组加入原始数据。
你可以通过运行查询来查看我正在尝试做的事情(我使用过Linqpad)。有一个页面列表,其中一些有插图。如果有的话,我想列出所有带插图的页面。
请评论..?
var illustrations = new []
{
new {page = 1, illustration= "a"},
new {page = 2, illustration = "b"},
new {page = 1, illustration = "c"}
};
var pages = new []
{
new {page = 1, pageName = "w"},
new {page = 2, pageName = "x"},
new {page = 3, pageName = "y"},
new {page = 4, pageName = "z"}
};
var x1 = new XElement("contents",
from page in pages join illustration in illustrations on page.page equals illustration.page
into pagesIllustrations from pr in pagesIllustrations.DefaultIfEmpty() //Left outer join
group page by page.page into g
select new XElement("content",
new XAttribute("contentPageName", g.First().pageName),
new XElement("pages",
from o1 in g.Distinct()
select new XElement("page",
new XAttribute("PageNumber", o1.page),
new XAttribute("PageName", o1.pageName))),
new XElement("illustrations",
from o2 in g.Distinct() join i in illustrations on o2.page equals i.page
select new XElement("illustration",
new XAttribute("PageNumber", i.page),
new XAttribute("IllustrationName", i.illustration)))));
x1.Dump();
这是我正在制作的xml。这正是我想要的,我不禁感到我不是最好的方式。
<contents>
<content contentFileName="w">
<pages>
<page PageNumber="1" PageName="w" />
</pages>
<resources>
<resource PageNumber="1" ResourceName="a" />
<resource PageNumber="1" ResourceName="c" />
</resources>
</content>
<content contentFileName="x">
<pages>
<page PageNumber="2" PageName="x" />
</pages>
<resources>
<resource PageNumber="2" ResourceName="b" />
</resources>
</content>
<content contentFileName="y">
<pages>
<page PageNumber="3" PageName="y" />
</pages>
<resources />
</content>
<content contentFileName="z">
<pages>
<page PageNumber="4" PageName="z" />
</pages>
<resources />
</content>
</contents>