calendar, exporting Outlook emails to CSV - powershell

Question

My job is to export emails from Outlook default inbox folder to CSV file.
Here is the script:
cls
Function Get-OutlookInBox #getoutlookcontent
{
Add-type -assembly "Microsoft.Office.Interop.Outlook" | out-null
$olFolders = "Microsoft.Office.Interop.Outlook.olDefaultFolders" -as [type]
$outlook = new-object -comobject outlook.application
$namespace = $outlook.GetNameSpace("MAPI")
$folder = $namespace.getDefaultFolder($olFolders::olFolderInBox)
$folder.items |
Select-Object -Property Subject, ReceivedTime, SenderName, to
}
write-host "select date greater or equal to and hit enter"
Function date1
#calendar
{
[void]
[System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
$objForm = New-Object Windows.Forms.Form
$objForm.Text = "Select a Date"
$objForm.Size = New-Object Drawing.Size #(190,190)
$objForm.StartPosition = "CenterScreen"
$objForm.KeyPreview = $True
$objForm.Add_KeyDown({
if ($_.KeyCode -eq "Enter")
{
$global:dtmDate=$objCalendar.SelectionStart
$objForm.Close()
}
})
$objForm.Add_KeyDown({
if ($_.KeyCode -eq "Escape")
{
$objForm.Close()
}
})
$objCalendar = New-Object System.Windows.Forms.MonthCalendar
$objCalendar.ShowTodayCircle = $False
$objCalendar.MaxSelectionCount = 1
$objForm.Controls.Add($objCalendar)
$objForm.Topmost = $True
$objForm.Add_Shown({$objForm.Activate()})
[void] $objForm.ShowDialog()
}
date1
$gt = (get-date).tostring() #getcurrent date
Get-OutlookInbox | #exporting
where { $_.ReceivedTime -gt [datetime] "$globa:dtmdate" -AND $_.ReceivedTime
-le
[datetime] "$gt" } | Export-Csv D:\Users\XXX\Desktop\test1.csv -
Encoding ASCII -NoTypeInformation -force
Parts of code are works perfectly fine separately.
I am able export emails when i am putting date in to code like that:
Get-OutlookInbox | #exporting
where { $_.ReceivedTime -gt [datetime] "8/21/2017" -AND $_.ReceivedTime
-le
[datetime] "8/24/2017" } | Export-Csv D:\Users\XXX\Desktop\test1.csv -
Encoding ASCII -NoTypeInformation -force
but while I am trying to put variable instead of exact values I am getting error msg Cannot convert value "" to type "System.DateTime". Error: "String was not recognized as a valid DateTime."
My question is how to convert variable in to datetime.
Second thing which I notice in this part of code
Get-OutlookInbox | #exporting
where { $_.ReceivedTime -gt [datetime] "8/21/2017" -AND $_.ReceivedTime
-le
[datetime] "8/24/2017" } | Export-Csv D:\Users\XXX\Desktop\test1.csv -
Encoding ASCII -NoTypeInformation -force
In that case operator -gt works perfectly fine for me even it shouldn't. Script exporting emails from date which I set not day after. But second part -le works like less than not less and equal. Which is confusing since I need to set date day+1. I have tried to put several comparison operators but result is always the same.