How do I transform this element in my Web.config? - visual-studio

Question

I've been googling for about half the day here and I'm still just as clueless as when I started on this.
Here's the relevant portion of my Web.config
<?xml version="1.0" encoding="utf-8"?>
<!--
For more information on how to configure your ASP.NET application, please visit
http://go.microsoft.com/fwlink/?LinkId=169433
-->
<configuration>
<!--
For a description of web.config changes see http://go.microsoft.com/fwlink/?LinkId=235367.
The following attributes can be set on the <httpRuntime> tag.
<system.Web>
<httpRuntime targetFramework="4.5.2"/>
</system.Web>
-->
<configSections>
<section name="nlog" type="NLog.Config.ConfigSectionHandler, NLog"/>
<sectionGroup name="applicationSettings"
type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
<section name="DasExternalFileTransfer.Properties.Settings"
type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
</sectionGroup>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework"
type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
requirePermission="false"/>
</configSections>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd">
<targets>
<target name="logfile" xsi:type="File" fileName="" layout="${longdate} ${callsite} ${level} ${message}"/>
</targets>
<rules>
<logger name="*" minlevel="Debug" writeTo="logfile"/>
</rules>
</nlog>
I want to replace the fileName value under configuration/nlog/targets/target.
I have tried half a dozen different things in my Web.Dev.config. The latest would be
<?xml version="1.0" encoding="utf-8"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<target xdt:Transform="Replace" xdt:Locator="XPath(/configuration/nlog/targets)" />
<target xdt:Transform="Replace" fileName="\\newlocation.ad\location1" />
<system.web>
<compilation xdt:Transform="RemoveAttributes(debug)" />
</system.web>
</configuration>
To this point I have seen no effect when I preview my transform in Visual Studio.
I suspect that I am not defining the element in a way that the process can locate it, but I am not sure.
Could someone please help me figure out how to define the element properly so that I can replace the value with a new one? Or am I simply taking the wrong approach?
OK, THINK I'VE FIGURED IT OUT
It appears that the namespaces were tripping me up.
I modified this section of my Web.config
<nlog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd">
<targets>
<target name="logfile" xsi:type="File" fileName="" layout="${longdate} ${callsite} ${level} ${message}"/>
</targets>
<rules>
<logger name="*" minlevel="Debug" writeTo="logfile"/>
</rules>
</nlog>
Note, I removed xmlns="http://www.nlog-project.org/schemas/NLog.xsd".
Then I modified my Web.Dev.config to
<?xml version="1.0" encoding="utf-8"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<nlog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd">
<targets>
<target xdt:Transform="SetAttributes(fileName)" xdt:Locator="Match(name)" name="logfile" fileName="\\newlocation.ad\location1" />
</targets>
</nlog>
<system.web>
<compilation xdt:Transform="RemoveAttributes(debug)" />
</system.web>
</configuration>
Then, when I preview the transform, I see this as the result <target name="logfile" xsi:type="File" fileName="\\newlocation.ad\location1" layout="${longdate} ${callsite} ${level} ${message}"/>.
I just hope now that the removal of the namespace will not adversely affect NLog, but I'll be testing to determine that.

Answer 1

It appears that the namespaces were tripping me up.
I modified this section of my Web.config
<nlog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd">
<targets>
<target name="logfile" xsi:type="File" fileName="" layout="${longdate} ${callsite} ${level} ${message}"/>
</targets>
<rules>
<logger name="*" minlevel="Debug" writeTo="logfile"/>
</rules>
</nlog>
Note, I removed xmlns="http://www.nlog-project.org/schemas/NLog.xsd".
Then I modified my Web.Dev.config to
<?xml version="1.0" encoding="utf-8"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<nlog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd">
<targets>
<target xdt:Transform="SetAttributes(fileName)" xdt:Locator="Match(name)" name="logfile" fileName="\\newlocation.ad\location1" />
</targets>
</nlog>
<system.web>
<compilation xdt:Transform="RemoveAttributes(debug)" />
</system.web>
</configuration>
Then, when I preview the transform, I see this as the result <target name="logfile" xsi:type="File" fileName="\\newlocation.ad\location1" layout="${longdate} ${callsite} ${level} ${message}"/>.
I just hope now that the removal of the namespace will not adversely affect NLog, but I'll be testing to determine that.