Powershell - DataViewGrid - Column Autosize - powershell

Question

I am a complete novice when it comes to .NET and powershell and was wondering if you guys could assist. I am generating a Data Grid from a .CSV on a form and would like the grid to auto size columns accordingly. Also if I could lock the columns/rows from user adjustment that would be amazing.
Clear-Host
Function Populate-CycleCountDataGrid {
$InventoryListArray = New-Object System.Collections.ArrayList
$Script:InventoryList = #(Import-CSV C:\File.csv | Write-Output)
$InventoryListArray.AddRange($Script:InventoryList)
$CycleCountDataGrid.DataSource = $InventoryListArray
}
Function GenerateForm {
$objForm = New-Object System.Windows.Forms.Form
$InitialFormWindowState = New-Object System.Windows.Forms.FormWindowState
$RefreshButton_Click = {
Populate-CycleCountDataGrid
}
# Form Setup
#*******************************************************************************************\
$OnLoadForm_StateCorrection= { $objForm.WindowState = $InitialFormWindowState }
$objForm.Text = "CycleCount"
$objForm.Name = "CycleCount"
$objForm.Size = New-Object System.Drawing.Size(600,480)
$objForm.StartPosition = 0
$objForm.AutoSize = $False
$objForm.MinimizeBox = $False
$objForm.MaximizeBox = $False
$objForm.WindowState = "Normal"
# DataGrid
#*******************************************************************************************\
$CycleCountDataGrid = New-Object System.Windows.Forms.DataGrid
$CycleCountDataGrid.Location = New-Object System.Drawing.Size(0,0)
$CycleCountDataGrid.Size = New-Object System.Drawing.Size(592,400)
$CycleCountDataGrid.AutoSize = $False
$CycleCountDataGrid.AllowSorting = $False
$CycleCountDataGrid.ReadOnly = $True
$CycleCountDataGrid.CaptionText = "Inventory List"
$CycleCountDataGrid.HeaderFont = New-Object System.Drawing.Font("Verdana",8.25,1,3,0)
$CycleCountDataGrid.HeaderForeColor = [System.Drawing.Color]::FromArgb(255,0,0,0)
$CycleCountDataGrid.Font = New-Object System.Drawing.Font("Verdana",8.25,[System.Drawing.FontStyle]::Bold)
$CycleCountDataGrid.BackColor = [System.Drawing.Color]::FromArgb(255,0,160,250)
$CycleCountDataGrid.AlternatingBackColor = [System.Drawing.Color]::FromArgb(255,133,194,255)
$CycleCountDataGrid.Name = "CycleCountDataGrid"
$CycleCountDataGrid.DataBindings.DefaultDataSourceUpdateMode = 0
$objForm.Controls.Add($CycleCountDataGrid)
#*******************************************************************************************/
# Refresh Button
#*******************************************************************************************\
$RefreshButton = New-Object System.Windows.Forms.Button
$RefreshButton.Location = New-Object System.Drawing.Size(0,400)
$RefreshButton.Size = New-Object System.Drawing.Size(590,45)
$RefreshButton.Name = "RefreshButton"
$RefreshButton.Text = "Refresh"
$RefreshButton.UseVisualStyleBackColor = $True
$RefreshButton.add_Click($RefreshButton_Click)
$RefreshButton.DataBindings.DefaultDataSourceUpdateMode = 0
$objForm.Controls.Add($RefreshButton)
#*******************************************************************************************/
$objForm.Topmost = $True
$objForm.Add_Shown({$objForm.Activate()})
$objForm.FormBorderStyle = 'Fixed3D'
$objForm.MaximizeBox = $False
$objForm.Add_FormClosing([System.Windows.Forms.FormClosingEventHandler]{
if ($objForm.DialogResult -eq "Cancel") {}
})
$InitialFormWindowState = $objForm.WindowState
$objForm.add_Load($OnLoadForm_StateCorrection)
$objForm.ShowDialog()
#*******************************************************************************************/
}
GenerateForm

Answer 1

Add the following code:
$CycleCountDataGrid.Columns | Foreach-Object{
$_.AutoSizeMode = [System.Windows.Forms.DataGridViewAutoSizeColumnMode]::AllCells
}

Answer 2

Change your control to a system.windows.forms.datagridview rather than just a datagrid. Then you have access to $CycleCountDataGrid.columns
Each column has a width property. The answer above will try to autosize each column but you could specify each one if you like.
$CycleCountDatarid.columns[0].width = 200
100 is the default

Answer 3

The secret to Autosizing a Windows.Forms.Datagrid is that it has a private method 'ColAutoResize' you can invoke with Reflection:
Function AutoResizeColumns([System.Windows.Forms.DataGrid] $dg1){
[System.Reflection.BindingFlags] $F = 'static','nonpublic','instance'
$ColAutoResizeMethod = $dg1.GetType().GetMethod('ColAutoResize', $F)
If($ColAutoResizeMethod) {
For ([int]$i = $dg1.FirstVisibleColumn; $i -lt $dg1.VisibleColumnCount; $i++){
$ColAutoResizeMethod.Invoke($dg1, $i) | Out-Null
}
}
}
Once you have that function, you can add it to the DataGrid's VisibleChanged and DataSourceChanged events so drawing and refreshing the DataGrid will invoke AutoResizeColumns:
$objForm.Controls["CycleCountDataGrid"].add_DatasourceChanged({ AutoResizeColumns $objForm.Controls["CycleCountDataGrid"] } )
$objForm.Controls["CycleCountDataGrid"].add_VisibleChanged({ AutoResizeColumns $objForm.Controls["CycleCountDataGrid"] } )
$objForm.ShowDialog() | Out-Null
There's probably a cleaner way to do this, but it's working for me.