Export from DataGridView - powershell

Question

I need to create a button on a PowerShell GUI to save the content of a DataGridView when pressed. This needs to open a file dialogue box to select the destination and give it a file name.
See code for what I have already tried
$btnSave_Click={
$saveFile = New-Object System.Windows.Forms.SaveFileDialog
$saveFile.Filter = "Comma Delimited (*.csv) | *.csv "
$saveFile.FileName
if ($saveFile.ShowDialog() -eq 'OK')
{
$results.SelectAll()
$results.ClipboardCopyMode = 'EnableAlwaysIncludeHeaderText'
$results.GetClipboardContent().GetData('Text') | Out-File
$saveFile.FileName
}
}
Error received is
ERROR: You cannot call a method on a null-valued expression.
ERROR: char:4
ERROR: + $results.SelectAll()
ERROR: + ~~~~~~~~~~~~~~~~~~~~~~~~~
ERROR: + CategoryInfo : InvalidOperation: (:) [],
RuntimeException
ERROR: + FullyQualifiedErrorId : InvokeMethodOnNull
ERROR:
ERROR: The property 'ClipboardCopyMode' cannot be found on this object.
Verify that the property exists and can be set.
ERROR: char:4
ERROR: + $results.ClipboardCopyMode
= 'EnableAlwaysIncludeHea ...
ERROR: +
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ERROR: + CategoryInfo : InvalidOperation: (:) [],
RuntimeException
ERROR: + FullyQualifiedErrorId : PropertyNotFound
ERROR:
ERROR: You cannot call a method on a null-valued expression.
ERROR: char:4
ERROR: + $results.GetClipboardContent().GetData('Text') |
Out ...
ERROR: +
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ERROR: + CategoryInfo : InvalidOperation: (:) [],
RuntimeException
ERROR: + FullyQualifiedErrorId : InvokeMethodOnNull
ERROR:

Answer 1

maybe you meant
$result = $DataGridViewdata.selectall()