Datagridview Export HeaderText - winforms

Question

I'm working with the datagridview below. I'm trying to export the header names.
If you run this code and hit export, it will only output the column headers that the user can see initially (up to 'Model'), but it won't output 'Version' or 'Last Rebooted'. If you scroll to the right before hitting export then it will display all column names.
[void] [System.Reflection.Assembly]::LoadWithPartialName(“System.Windows.Forms”)
[void] [System.Reflection.Assembly]::LoadWithPartialName(“System.Drawing”)
$form = New-Object System.Windows.Forms.Form
$form.Size = New-Object System.Drawing.Size(1040,518)
$form.KeyPreview = $true
$form.StartPosition = ‘centerscreen’
$form.BackColor = 'MidnightBlue'
$form.Add_KeyDown({if($_.KeyCode -eq "Escape"){$form.Close()}})
$form.Text = "Dialog Box 3.4"
$form.Icon = [system.drawing.icon]::ExtractAssociatedIcon($PSHOME + "\powershell_ise.exe")
$form.MinimumSize = New-Object System.Drawing.Size(1040,518)
$buttonPanel4 = New-Object Windows.Forms.Panel
$buttonPanel4.Size = New-Object Drawing.Size #(290,70)
$buttonPanel4.Dock = "left"
$buttonPanel4.BackColor = 'MidnightBlue'
$DataGrid = New-Object System.Windows.Forms.DataGridView
$DataGrid.Location = New-Object System.Drawing.Size(298,29)
$DataGrid.Dock = "Fill"
$DataGrid.BorderStyle = ‘FixedSingle’
$DataGrid.ColumnHeadersDefaultCellStyle.Font = New-Object System.Drawing.Font(“segoe UI”,9.25)
$DataGrid.DefaultCellStyle.Font = New-Object System.Drawing.Font(“segoe UI”,9.25)
$DataGrid.AllowUserToAddRows = $false
$DataGrid.RowHeadersVisible = $false
$DataGrid.BackgroundColor = "White"
$DataGrid.ColumnCount = 10
$DataGrid.Columns[0].Name = ‘Machine’
$DataGrid.Columns[1].Name = ‘OperatingSystem’
$DataGrid.Columns[2].Name = ‘ServicePack’
$DataGrid.Columns[3].Name = ‘Architecture’
$DataGrid.Columns[4].Name = ‘Domain’
$DataGrid.Columns[5].Name = ‘PhysicalMemory’
$DataGrid.Columns[6].Name = ‘Manufacturer’
$DataGrid.Columns[7].Name = ‘Model’
$DataGrid.Columns[8].Name = ‘Version’
$DataGrid.Columns[9].Name = ‘Last Rebooted’
$DataGrid.Columns[9].Width = '140'
$Exportbutton = New-Object System.Windows.Forms.Button
$Exportbutton.Location = New-Object System.Drawing.Size(9,350)
$Exportbutton.Size = New-Object System.Drawing.Size(85,23)
$Exportbutton.Text = “Export-CSV”
$Exportbutton.BackColor = ‘LightGray’
$Exportbutton.UseVisualStyleBackColor = $true
$Exportbutton.Font = New-Object System.Drawing.Font(“segoe UI”,9)
$Exportbutton.Add_Click({
$columnNames = $null
$columnNames = $DataGrid.Columns[0].HeaderText
for($i = 1; $i -lt $DataGrid.ColumnCount;$i++){
$columnNames += ",$($DataGrid.Columns[$i].HeaderText)"
write-host $($DataGrid.Columns[$i].HeaderText) -ForegroundColor Magenta
}
write-host $columnNames -foregroundcolor cyan
})
$buttonPanel4.Controls.Add($Exportbutton)
$form.Controls.Add($DataGrid)
$form.Controls.Add($buttonPanel4)
$form.ShowDialog() | out-null
Is there a reason why this occurs and how can I export all the column names without scrolling to the right first?

Answer 1

As #pandemic points out, $buttonPanel4 is not defined/shown, also it appears you are setting the DataGrid.Dock property to Fill, which would cover up this button if it’s panel existed.
I do not have an answer for WHY the headers text returns an empty string until the header becomes visible in the data grid. I am guessing it is because the HeaderText property has not been set. I assume if the HeaderTexts property has not been set it will default to the columns Name property if needed. If you set each columns HeaderText property as you are with the Name property, this problem will not happen.
So either set each columns HeaderText or use its Name property as the code below shows.
I changed the code below to use the columns Name instead of the headers text and it appears to work correctly. In addition, I changed how the comma is inserted in to the $columnNames string variable to start the loop at index 0. Hope this helps.
$Exportbutton.Add_Click({
$columnNames = $null
for($i = 0; $i -lt $DataGrid.ColumnCount;$i++){
$columnNames += "$($DataGrid.Columns[$i].Name)"
if ($i -lt $DataGrid.ColumnCount - 1) {
$columnNames += ","
}
write-host $($DataGrid.Columns[$i].Name) -ForegroundColor Magenta
}
write-host $columnNames -foregroundcolor cyan
})