如何只為XML中的特定標記替換“ \\”和“ \\\\”？

Question

我正在嘗試匹配XML中的Location標記，並僅將Location標記的xml內容中的“ \\”替換為“ \\\\”，有人可以提供有關該操作方法的指南嗎？

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace Matchlocationreplacebackslash
{
    class Program
    {
        static void Main(string[] args)
        {
            string pattern = "<Location>(.*?)</Location>";
            string xmlcontent = @"<SoftwareProductBuild>
                        <BuildSource>QCA_DEV_POSTCOMMIT</BuildSource>
                        <BuiltBy>wbibot</BuiltBy>
                        <CreatedBy>wbibot</CreatedBy>
                        <Name>BTFM.CHE.2.1.2-00091-QCACHROM-1_NO_VARIANT</Name>
                        <Status>Approved</Status>
                        <BuiltOn>2017-08-28T13:00:04.345Z</BuiltOn>
                        <Tag>BTFM.CHE.2.1.2_BTFM.CHE.2.1.2-00091-QCACHROM-1_2017-08-28T13:00:04.345Z</Tag>
                        <SoftwareImageBuilds>
                            <SoftwareImageBuild>
                                <Type>LA</Type>
                                <Name>BTFM.CHE.2.1.2-00091-QCACHROM-1_NO_VARIANT</Name>
                                <Location>\\snowcone\builds676\INTEGRATION\BTFM.CHE.2.1.2-00091-QCACHROM-1</Location>
                                <Variant>NO_VARIANT</Variant>
                                <LoadType>Direct</LoadType>
                                <Target>NO_VARIANT</Target>
                                <SoftwareImages>
                                    <SoftwareImage>
                                        <Name>BTFM.CHE.2.1.2</Name>
                                        <SoftwareProducts>
                                            <SoftwareProduct>
                                                <Name>MSM8998.LA.1.9</Name>
                                                <BaseMeta>CI_MSM8998.LA.1.9-16991-INT-2</BaseMeta>
                                            </SoftwareProduct>
                                        </SoftwareProducts>
                                    </SoftwareImage>
                                </SoftwareImages>
                            </SoftwareImageBuild>
                        </SoftwareImageBuilds>
                    </SoftwareProductBuild>";
            Match match = Regex.Match(xmlcontent, pattern); //Match location
            //Replace "\" with  "\\" in the xml content with the match
            Console.ReadLine();
        }
    }
}

Answer 1

您不需要正則表達式。 使用XML解析器，如Linq2Xml

var xDoc = XDocument.Parse(xmlcontent);
foreach(var loc in xDoc.Descendants("Location"))
{
    loc.Value = loc.Value.Replace(@"\", @"\\");
}

string newXml = xDoc.ToString();

PS：一個不錯的SO閱讀文章。 RegEx匹配XHTML自包含標簽以外的打開標簽

Answer 2

您可以使用以下代碼：

var xmlDoc = new XmlDocument();
xmlDoc.LoadXml(xmlcontent);
var locations = xmlDoc.GetElementsByTagName("Location");
foreach (XmlNode location in locations)
{
    var newLocation = location.InnerText.Replace("\\", "\\\\");
    location.InnerText = newLocation;
}

如果您需要更新xmlcontent則可以編寫：

xmlcontent = xmlDoc.OuterXml;