How to read a string from text file using powershell - powershell

Question

I want to read a specific string from a text file and output the string into another text file.
My text file (Sample.txt) looks like below:
#{AssemblyName=Microsoft.Office.Excel, Version=1.0.0.0, Culture=neutral, PublicKeyToken=1y08bdf1111e0105c; Path=C:\Tes\app1\cc\application; ProjectPath=C:\test\application\Application.vbproj; Name=Microsoft.Office.Excel}
#{AssemblyName=System; Path=C:\Tes\app2\ser\application; ProjectPath=C:\test\application2\Application.vbproj; Name=System}
I do not want to include anything except the assemblyname.. i.e, the script should not consider version, culture etc.
The text file has lot of such assembly information.
I would like to read only the AssemblyName and write that to another text file in powersehll.
For Ex: The output.txt should contain only Microsoft.Office.Excel.
Also, I want to exclude few assembly names that start with a specific string like for eg: System. How can I do that?
I tried below, but it's not writing anything to the output.txt.
$workdir = "C:\Test"
$Txt = "$workdir\Sample.txt"
Function GetAsmName($rTxt)
{
Get-Content $Txt
$regex = '#{AssemblyName="(\w*?)"[,|;]'
$matches = (select-string -Path $Txt -Pattern $regex)
$matches | Select -Expandproperty Matches | Select #{n="Name";e={$_.Groups[1].Value}}
Set-Content -path $workdir\Output.txt -value $matches
}
Any help would be greatly appreciated.
Thanks

Answer 1

Try:
$workdir = "C:\Test"
$Txt = "$workdir\Sample.txt"
Function GetAsmName($rTxt)
{
$captures = gc $rTxt |
select-string -Pattern '(?<=AssemblyName=)([^;|,]*)' -allmatches |
select -expa matches | select -expa value
Set-Content -path $workdir\Output.txt -value $captures
}
GetAsmName $Txt