Question

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:\XCAM\OUTPUT" 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.

Answer 1

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.