在某个父节点内添加一个新节点（从另一个 xml 文件中获取值）？

Question

我正在尝试创建一个具有以下步骤的程序：

1) 从用户给定路径获取所有xml文件

2）打开每个文件（如果有）并搜索节点<institution>，格式为<funding-source><institution-wrap><institution>...</institution></institution-wrap></funding-source>

3) 获取节点<institution>的值，并在节点<skosxl:literalForm xml:lang="...">内的database xml中搜索准确值

4）如果找到，则得到其父节点<skos:Concept rdf:about="...">减去字符串http://dx.doi.org/

的属性值

5) 在xml文件中<institution>节点之后添加一个节点<institution-id institution-id-type="fundref">，其值类似于<funding-source><institution-wrap><institution>...</institution><institution-id institution-id-type="fundref">VALUE of the rdf:about attribute</institution-id></institution-wrap></funding-source>

这是一个示例 input file 和该文件的 desired output。

我尝试过的：

string pathToUpdatedFile = @"D:\test\Jobs";
var files=Directory.GetFiles(pathToUpdatedFile,"*.xml");
foreach (var file in files)
{
    var fundingDoc = XDocument.Load(@"D:\test\database.xml");
    XNamespace rdf=XNamespace.Get("http://www.w3.org/1999/02/22-rdf-syntax-ns#");
    XNamespace skosxl = XNamespace.Get("http://www.w3.org/2008/05/skos-xl#");
    XNamespace skos=XNamespace.Get("http://www.w3.org/2004/02/skos/core#");

    var targetAtt = fundingDoc.Descendants(skos+"Concept").Elements(skosxl+"prefLabel")
        .ToLookup(s => (string)s.Element(skosxl+"literalForm"), s => (string)s.Parent.Attribute(rdf+"about"));
    XDocument outDoc = XDocument.Parse(File.ReadAllText(file),LoadOptions.PreserveWhitespace);
    foreach (var f in outDoc.Descendants("funding-source").Elements("institution-wrap"))
    {
        if (f.Element("institution-id") == null)
        {
            var name = (string)f.Element("institution");
            var x = targetAtt[name].FirstOrDefault(); // just take the first one
            if (x != null)

                f.Add(new XElement("institution-id", new XAttribute("institution-id-type","fundref"),x.Substring(@"http://dx.doi.org/".Length)));
        }
        outDoc.Save(file);
    }

    Console.ReadLine();

但它不起作用...有人可以帮忙...

Answer 1

见下面的代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;
using System.Data;
using System.Data.OleDb;

namespace ConsoleApplication31
{
    class Program
    {
        const string FILENAME = @"c:\temp\test.xml";
        const string DATABASE = @"c:\temp\test1.xml";

        static void Main(string[] args)
        {
            XDocument doc = XDocument.Load(FILENAME);

            XElement article = doc.Root;
            XNamespace ns = article.GetDefaultNamespace();

            XDocument docDatabase = XDocument.Load(DATABASE);
            XElement rdf = docDatabase.Root;
            XNamespace nsSkosxl = rdf.GetNamespaceOfPrefix("skosxl");
            XNamespace nsRdf = rdf.GetNamespaceOfPrefix("rdf");

            List<XElement> prefLabels = rdf.Descendants(nsSkosxl + "prefLabel").ToList();
            Dictionary<string, List<string>> dictLabels = prefLabels.GroupBy(x => (string)x.Descendants(nsSkosxl + "literalForm").FirstOrDefault(), y => (string)y.Element(nsSkosxl + "Label").Attribute(nsRdf + "about"))
                .ToDictionary(x => x.Key, y => y.ToList());

            List<XElement> fundingSources = article.Descendants(ns + "funding-source").ToList();

            foreach (XElement fundingSource in fundingSources)
            {
                XElement institutionWrap = fundingSource.Element(ns + "institution-wrap");
                string institution = (string)fundingSource;

                if (dictLabels.ContainsKey(institution))
                {
                    institutionWrap.Add(new XElement("institution-id", new object[] { 
                       new XAttribute("institution-id-type","fundref"),
                       dictLabels[institution]
                    }));
                }
                else
                {
                    Console.WriteLine("Dictionary doesn't contain : '{0}'", institution);
                }

            }
            Console.ReadLine();
        }

    }
}

Answer 2

我想这就是你要找的（修改 jdweng 的 CODE A LITTLE）

const string FILENAME = @"c:\temp\test.xml";
const string DATABASE = @"c:\temp\test1.xml";
public static void Main(string[] args)
{
    XDocument doc = XDocument.Load(FILENAME);

    XElement article = doc.Root;
    XNamespace ns = article.GetDefaultNamespace();

    XDocument docDatabase = XDocument.Load(DATABASE);
    XElement rdf = docDatabase.Root;
    XNamespace nsSkosxl = rdf.GetNamespaceOfPrefix("skosxl");
    XNamespace nsSkos = rdf.GetNamespaceOfPrefix("skos");
    XNamespace nsRdf = rdf.GetNamespaceOfPrefix("rdf");

    List<XElement> prefLabels = rdf.Descendants(nsSkos + "Concept").ToList();
    Dictionary<string, List<string>> dictLabels = prefLabels.GroupBy(x => (string)x.Descendants(nsSkosxl + "literalForm").FirstOrDefault(), y => (string)y.Parent.Element(nsSkos+"Concept").Attribute(nsRdf + "about").Value.Substring(18))
        .ToDictionary(x => x.Key, y => y.ToList());

    List<XElement> fundingSources = article.Descendants(ns + "funding-source").ToList();

    foreach (XElement fundingSource in fundingSources)
    {
        XElement institutionWrap = fundingSource.Element(ns + "institution-wrap");
        string institution = (string)fundingSource;

        if (dictLabels.ContainsKey(institution))
        {
            institutionWrap.Add(new XElement("institution-id", new object[] {
                                                new XAttribute("institution-id-type","fundref"),
                                                dictLabels[institution]
                                             }));
        }
    }
    doc.Save(FILENAME);
    Console.WriteLine("Done");
    Console.ReadLine();
}