如何对List< IGrouping< string，XElement>>进行排序按自定义顺序? [英] How do I sort a List<IGrouping<string, XElement>> in custom order?
问题描述
我有一个XML，我想对具有相同值的多个元素进行分组.
I have an XML and I want to group multiple elements that have the same value.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE repub SYSTEM "C:\repub\Repub_V1.dtd">
<?xml-stylesheet href="C:\repub\repub.xsl" type="text/xsl"?>
<repub>
<head>
<title>xxx</title>
</head>
<body>
<sec>
<title>First Title</title>
<break name="1-1">
<heading><page num="1"/>First Heading</heading>
<bl>This is another text</bl>
<p>This is a paragraph</p>
</break>
</sec>
<sec>
<title>Second Title</title>
<break name="2-1">
<heading><page num="1"/>Second Heading</heading>
<bl>This is another text</bl>
<p>This is a paragraph</p>
</break>
</sec>
<sec>
<title>First Title</title>
<break name="3-1">
<heading><page num="1"/>Third Heading</heading>
<bl>This is another text</bl>
<p>This is a paragraph</p>
</break>
</sec>
<sec>
<title>Third Title</title>
<break name="4-1">
<heading><page num="1"/>Fourth Heading</heading>
<bl>This is another text</bl>
<p>This is a paragraph</p>
</break>
<break name="5-1">
<heading><page num="1"/>Fifth Heading</heading>
<bl>This is another text</bl>
<p>This is a paragraph</p>
</break>
</sec>
</body>
</repub>
我已经将值分组了，但是它是List<IGrouping<string, XElement>>格式，这不是问题.
I have already grouped the values but it is in List<IGrouping<string, XElement>> format and that is not the issue.
问题是我想检查列表中的值，并查看是否存在特定值，例如在这种情况下为第三标题".因此，无论何时，在任何XML中，如果有第三标题"，它将始终位于顶部，即[0]，其余部分将在出现时出现.
The issue is that I want to check for the values in the list and see if a particular value exists, say for example, in this scenario, "Third Title". So, whenever, in any XML, if there is Third Title, it will always be at the top, that is [0] and the rest will come as they occur.
我想知道如何自定义订购列表.
I want to know how to custom order my list.
问候 阿曼
推荐答案
在Xml Linq中使用字典:
Use a Dictionary with Xml Linq :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;
namespace ConsoleApplication103
{
class Program
{
const string FILENAME = @"c:\temp\test.xml";
static void Main(string[] args)
{
XDocument doc = XDocument.Load(FILENAME);
Dictionary<string, XElement> dic = doc.Descendants("sec")
.GroupBy(x => (string)x.Element("title"), y => y)
.ToDictionary(x => x.Key, y => y.FirstOrDefault());
}
}
}
没有字典的移动元素
Moving element without dictionary
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;
namespace ConsoleApplication103
{
class Program
{
const string FILENAME = @"c:\temp\test.xml";
static void Main(string[] args)
{
XDocument doc = XDocument.Load(FILENAME);
XElement body = doc.Descendants("body").FirstOrDefault();
List<XElement> results = body.Descendants("sec").Where(x => (string)x.Element("title") == "First Title").ToList();
if (results != null)
{
List<XElement> breaks = results.SelectMany(x => x.Elements("break")).ToList();
XElement newElement = XElement.Parse(results.FirstOrDefault().ToString());
newElement.Elements("break").Remove();
results.Remove();
newElement.Add(breaks);
body.AddFirst(newElement);
}
}
}
}
这篇关于如何对List< IGrouping< string，XElement>>进行排序按自定义顺序?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！
