Powershell filter a List by Name and Date - excel

Question

I need a bit of help... I'm new to powershell and i want to Filter a List (csv). I would love to remove all lines with certain names in it. and cut the list down to the last month. In the script you can see how far i got till now.
param(
[Parameter(ValueFromPipeline=$true,HelpMessage="Enter CSV path(s)")]
[String[]]$Path = $null
)
if($Path -eq $null) {
Add-Type -AssemblyName System.Windows.Forms
$Dialog = New-Object System.Windows.Forms.OpenFileDialog
$Dialog.InitialDirectory = "$InitialDirectory"
$Dialog.Title = "Select CSV File(s)"
$Dialog.Filter = "CSV File(s)|*.csv"
$Dialog.Multiselect=$true
$Result = $Dialog.ShowDialog()
if($Result -eq 'OK') {
Try {
$Path = $Dialog.FileNames
}
Catch {
$Path = $null
Break
}
}
else {
Write-Host -ForegroundColor Yellow "Notice: No file(s) selected."
Break
}
}
$info=Import-Csv "$path" -Delimiter ';'
$info | Get-Member
$info | Format-Table
as you can see i tryed to link the path to a filebrowser.

Answer 1

For the purposes of discussion, I will assume that the full pathname of the CSV is in the variable $InputPath, and that you want to write the result to a CSV file whose full pathname is in the variable $OutputPath. I will also assume that the CSV file contains a column named 'Name', and that the value from the Name column that you want to exclude is in the variable $ExcludedName. Given that, you can simply do
Import-CSV -Path $InputPath | Where-Object {$_.Name -ne $ExcludedName} | Export-CSV -Path $OutputPath -NoTypeInformation

Answer 2

You can do this by my code,but dont forget that first row must contains names of column and delimiter must be ';' and $nameslist is array of names that you need delete:
$info=Import-Csv "D:\testdir\file2.csv" -Delimiter ';'
$nameslist=#('James','John','andrew')
foreach($i in $info){
if($nameslist -contains $i.Name){
$i.Name=""
}
$i|Export-Csv -Path "D:\testdir\file1.csv" -Delimiter ';' -NoTypeInformation -Force -Encoding UTF8 -Append
}

Answer 3

Try this:
$data = Import-Csv "Path" | Select-Object * -ExcludeProperty Names
$data | export-csv "Path" -Notype
This will cut the column names.

Answer 4

Try it first without using a function:
Import-Csv <Filename> | Where-Object {$_.<FieldName> -notlike "*<Value>*"}
Also, you might consider something like this:
[CmdletBinding()]
param (
[Parameter(ValueFromPipeline = $true, HelpMessage = "Enter CSV path(s)")]
[String[]]$Path = $(
Add-Type -AssemblyName System.Windows.Forms
$DialogProperties = #{
Title = 'Select CSV File(s)'
Filter = 'CSV File(s)|*.csv'
Multiselect = $True
}
$Dialog = New-Object System.Windows.Forms.OpenFileDialog -Property $DialogProperties
$Dialog.ShowDialog()
If ($Result -eq 'OK') {
$Path = $Dialog.FileNames
} Else {
Write-Error 'Notice: No file(s) selected.'
}
)
)
Process {
ForEach ($PathItem in $Path) {
Import-Csv $PathItem | Where-Object { $_.Name -notlike "*NotThisOne*" }
}
}