我在XML文件中的以下文字：

 ＆LT;配置生成器=LP向导＆GT;
    ＆LT;库＆GT;
        ＆LT;图书馆名称=XCAMSource/＆GT;
    ＆LT; /库＆GT;
    ＆LT; InputFormats＆GT;
        ＆LT; XCAM格式=XCAMLibraryDirectory =C： XCAM/＆GT;
    ＆LT; / InputFormats＆GT;
    ＆LT; OutputFormats＆GT;
        ＆LT;脚垫版本=PADS 5.0ExportAscii =假LibraryGenerate =真正的ExtendedLayers =假AlphaLoc =部件类型格式=刹车片LibraryDirectory =C： XCAM 输出DirectoryStructure =假单位=毫米新的codeVersion =假usrLayerNameElecT =1usrLayerNameElecB =2usrLayerNameSilk =26usrLayerNameSilkb =29usrLayerNameCY =20usrLayerName3D =25usrLayerNameAssy =27usrLayerNameAssyb =30usrLayerNamePmask =23usrLayerNameSmask =21usrLayerNameSmaskb =28DirectImport =FALSE/＆GT;
    ＆LT; / OutputFormats＆GT;
＆LT; /配置＆GT;
 

我需要改变的文字。C： XCAM，根据 LibraryDirectory = 坐在

什么是聪明的方式来做到这一点，我只是不希望字符串搜索 LibraryDirectory = 然后搜索第一个和最后，然后更改文本相互之间的关系。

  VAR DOC = XDocument.Load（的test.xml）;
doc.Root.Element（XCAM）属性（LibraryDirectory）值=新价值。;
doc.Save（的test.xml）;
 

更新：

  doc.Root
   .Element（InputFormats）
   .Element（XCAM）
   属性约（LibraryDirectory）值=新价值。
 

或使用XPATH：

  doc.XPathSelectElement（// InputFormats / XCAM）
   属性约（LibraryDirectory）值=新价值。
 

不要忘了用 System.Xml.XPath 作为的 XPathSelectElement 是一个扩展方法。

I have the following text in xml file:

<Config Builder="LP Wizard">
    <Libraries>
        <Library Name="XCAMSource"/>
    </Libraries>
    <InputFormats>
        <XCAM Format="XCAM" LibraryDirectory="C:XCAM"/>
    </InputFormats>
    <OutputFormats>
        <Pads Version="PADS 5.0" ExportAscii="false" LibraryGenerate="true" ExtendedLayers="false" AlphaLoc="PART TYPE" Format="PADS" LibraryDirectory="c:XCAMOUTPUT" DirectoryStructure="false" Units="Millimeters" NewCodeVersion="false" usrLayerNameElecT="1" usrLayerNameElecB="2" usrLayerNameSilk="26" usrLayerNameSilkb="29" usrLayerNameCY="20" usrLayerName3D="25" usrLayerNameAssy="27" usrLayerNameAssyb="30" usrLayerNamePmask="23" usrLayerNameSmask="21" usrLayerNameSmaskb="28" DirectImport="false"/>
    </OutputFormats>
</Config>

I need to change the text "C:XCAM" that sits under LibraryDirectory=.

What is the smart way to do so, I just dont want to string search for LibraryDirectory= and then search for first and last " and then to change the text betweenthem.

var doc = XDocument.Load("test.xml");
doc.Root.Element("XCAM").Attribute("LibraryDirectory").Value = "new value";
doc.Save("test.xml");

UPDATE:

doc.Root
   .Element("InputFormats")
   .Element("XCAM")
   .Attribute("LibraryDirectory").Value = "new value";

or using XPATH:

doc.XPathSelectElement("//InputFormats/XCAM")
   .Attribute("LibraryDirectory").Value = "new value";

Don't forget to add the using System.Xml.XPath as XPathSelectElement is an extension method.