Automatically expanded rows and columns - powershell

Question

I am using code to open and view an XML file in datagridview, but the rows and columns are not already open like they are in excel.
I have been searching the internet for answers on how to have the data already presented like it would be in excel, but have not been able to find how to do this.
Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass
[Void][System.Reflection.Assembly]::LoadWithPartialName('Microsoft.VisualBasic')
[Void][reflection.assembly]::loadwithpartialname("System.Windows.Forms")
[Void][System.Windows.Forms.Application]::EnableVisualStyles()
#Open File Dialog
Function Get-FileName($initialDirectory){
[System.Reflection.Assembly]::LoadWithPartialName("System.windows.forms") | Out-Null
$OpenFileDialog = New-Object System.Windows.Forms.OpenFileDialog
$OpenFileDialog.initialDirectory = $initialDirectory
$OpenFileDialog.filter = "XML (*.xml)| *.xml"
$OpenFileDialog.ShowDialog() | Out-Null
$OpenFileDialog.filename
}
#Save File Dialog
Function Save-FileName($initialDirectory){
[System.Reflection.Assembly]::LoadWithPartialName("System.windows.forms") | Out-Null
$OpenFileDialog = New-Object System.Windows.Forms.SaveFileDialog
$OpenFileDialog.initialDirectory = $initialDirectory
$OpenFileDialog.filter = "XML (*.xml)| *.xml"
$OpenFileDialog.ShowDialog() | Out-Null
$OpenFileDialog.filename
}
#Create Form Functions
function Create-Form {
# Draw Form
$form1 = New-Object System.Windows.Forms.Form
$form1.ClientSize = New-Object System.Drawing.Size(725,400)
$form1.Text = "XML to DataGrid Editor"
$form1.Name = "form1"
$form1.DataBindings.DefaultDataSourceUpdateMode = 0
$form1.FormBorderStyle = 5
# Draw DataGrid
$dataGrid1 = New-Object System.Windows.Forms.DataGrid
$dataGrid1.Size = New-Object System.Drawing.Size(700,338)
$dataGrid1.Location = New-Object System.Drawing.Point (13,13)
$dataGrid1.DataBindings.DefaultDataSourceUpdateMode = 0
$dataGrid1.HeaderForeColor = [System.Drawing.Color]::FromArgb(255,0,0,0)
$dataGrid1.Name = "dataGrid1"
$dataGrid1.DataMember = ""
$dataGrid1.TabIndex = 0
$form1.Controls.Add($dataGrid1)
# Draw Open xml Configuration Button
$button_openxml = New-Object System.Windows.Forms.Button
$button_openxml.Size = New-Object System.Drawing.Size(150,25)
$button_openxml.Location = New-Object System.Drawing.Point(13,365)
$button_openxml.Text = "Open XML Document"
$button_openxml.Add_Click({
$xml_networkschema = Get-FileName
# Bind Data to DataGrid
$ds = New-Object System.Data.Dataset
$ds.ReadXml($xml_networkschema)
$dataGrid1.DataSource = $ds
})
$form1.Controls.Add($button_openxml)
# Save xml Configuration Button
$button_savexml = New-Object System.Windows.Forms.Button
$button_savexml.Size = New-Object System.Drawing.Size(150,25)
$button_savexml.Location = New-Object System.Drawing.Point(170,365)
$button_savexml.Text = "Save XML Document"
$button_savexml.enabled = "false"
$button_savexml.Add_Click({
$dbm_savenetworkschema = Save-FileName
$dataGrid1.DataSource.writexml($dbm_savenetworkschema)
})
$form1.Controls.Add($button_savexml)
$form1.ShowDialog()| Out-Null
}
Create-Form
what the display should like