Search for a specific string in web.config file

Question

Hi
Is there a way we can search a specific word in web.config using powershell.
I have an entry of "user name" in the connection string. I want to find what the user name is and whether its a correct user name or not based on the criteria set in the script.
i believe its a simple matter of if statement but due to connection string i am unable to do this.
this is my connection string from web.config
    <connectionStrings>
    <add name="Membership" connectionString="Data Source=testdb;Initial Catalog=test;user   
    name=testUser;password=123456;MultipleActiveResultSets=true" 
    providerName="System.Data.SqlClient"/>
    </connectionStrings>
My criteria is. if user name -eq testUser write-host "correct user name" else "user name is incorrect"
This is the script which i am using
    $webConfig = 'C:\Users\test\web.config'
    $cfg = [xml](gc $webConfig)
Not sure how the if statement will work in searching the document and applying critera

Answer 1

Here is the full web.config file. i just modified the credentials.
<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection,
EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    <section name="nlog" type="NLog.Config.ConfigSectionHandler, NLog" />
    <sectionGroup name="common">
      <section name="logging" type="Common.Logging.ConfigurationSectionHandler,
Common.Logging" />
    </sectionGroup>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468
-->
  </configSections>
  <connectionStrings>
    <add name="Membership" connectionString="Data Source=TestDB;Initial Catalog=Test;user
id=TestUser;password=1234556;MultipleActiveResultSets=true" providerName="System.Data.SqlClient" />
    <add name="Administrator" connectionString="Data Source=TestDB;Initial Catalog=Test;user
id=TestUser;password=1234556;MultipleActiveResultSets=true" providerName="System.Data.SqlClient" />
  </connectionStrings>
   <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1" />
  </startup>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory,
EntityFramework" />
  </entityFramework>
  <nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
throwExceptions="true">
  <targets>
       <target name="f1" xsi:type="File" fileName="test.log.txt"
layout="${threadname} ${longdate}
     ${callsite} ${logger}[${level}] ${message}" />
       <target name="console" xsi:type="Console" layout="${threadname}
${longdate} ${callsite}
     ${logger}[${level}] ${message}" />
     </targets>
 <rules>
      <!--<logger name="Quartz.*" level="Warn" />-->
      <logger name="*" writeTo="f1" minlevel="Info" />
      <logger name="*" writeTo="console" minlevel="Debug"
/>
    </rules>
  </nlog>
  <common>
    <logging>
      <factoryAdapter type="Common.Logging.NLog.NLogLoggerFactoryAdapter, Common.Logging.NLog20">
        <arg key="configType" value="INLINE" />
      </factoryAdapter>
    </logging>
  </common>
  <appSettings>
   <add key="V3Import.Import.TestMode" value="true" />
    <add key="MSMQ.QueueName" value="TestQueue" />
    <add key="MSMQ.ErrorQueueName" value="TestQueue" />
    <add key="AdminSignaturePath" value="C:\user\test\myfolder" />
    <add key="SyncQueueJobCRON" value="0 0/2 * 1/1 * ? *" />
  </appSettings>
  <system.web>
    <authentication mode="Forms">
      <forms loginUrl="~/Account/Login" timeout="5000000" />
    </authentication>
    <membership defaultProvider="AspNetMembershipProvider">
      <providers>
        <add connectionStringName="Membership" enablePasswordRetrieval="false"
enablePasswordReset="false" requiresQuestionAndAnswer="false" applicationName="/Test" requiresUniqueEmail="false" passwordFormat="Hashed" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6"
minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" passwordStrengthRegularExpression="" name="AspNetMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0,
Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
      </providers>
    </membership>
    <profile>
      <providers>
        <add name="AspNetProfileProvider" connectionStringName="Membership"
applicationName="/Test" type="System.Web.Profile.SqlProfileProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
      </providers>
    </profile>
    <roleManager>
      <providers>
        <add name="AspNetRoleProvider" connectionStringName="Membership"
applicationName="/Test" type="System.Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
      </providers>
    </roleManager>
  </system.web>
  <system.net>
  </system.net>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="dotless.Core" publicKeyToken="96b446c9e63eae34"
culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-1.3.1.0" newVersion="1.3.1.0"
/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35"
culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-5.1.0.0" newVersion="5.1.0.0"
/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35"
culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0"
/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="EntityFramework" publicKeyToken="b77a5c561934e089"
culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0"
/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="NLog" publicKeyToken="5120e14c03d0593c"
culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-2.1.0.0" newVersion="2.1.0.0"
/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed"
culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0"
/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>