1

Im working on a project in Powershell the uses WPF controls.

I have a datagridview where only one full row can be selected. There is also a contextmenustrip that is working fine in the datagridview as well.

My problem is that I would like a right-click mouse event to select the row on which it was clicked and display the contextmenustrip. so there is no question for the user what they clicked. Currently, the selected row doesnt change on right click.

I've found many examples, but could use some guidance on converting them for use in powershell.

Once i get this down, i want to assign actions to each of the contextmenustrip selections Thanks!

Jimbaland
  • 13
  • 3
  • "I've found many examples, but could use some guidance on converting them for use in powershell." - what examples, and which parts are you stuck with? – Mathias R. Jessen Jun 01 '21 at 15:45
  • For instance this is an example ive found thats not optimized for using in powershell (the first answer listed)https://stackoverflow.com/questions/3035144/right-click-to-select-a-row-in-a-datagridview-and-show-a-menu-to-delete-it Im just not sure where and how to convert this. Is it in my contextmenustrip creation,, or in my datagridviewproperties, or both? – Jimbaland Jun 01 '21 at 15:56
  • @MathiasR.Jessen, So at this point I have a way of determining if it was a right click, and I think I have the way to select the row, but Im unsure of how to get the screen coordinates to populate my hittest variable... `$DataGridView.add_mouseup({ If ($_.Button -eq [System.Windows.Forms.MouseButtons]::Right){ $point $HTI = $DataGridView.HitTest(?) $DataGridView.ClearSelection() $DataGridView.Rows[$HTI.RowIndex].Selected = $true } })` – Jimbaland Jun 01 '21 at 20:44

1 Answers1

0

The code in the linked answer, can be translated to PowerShell like as follows.

Event handler registration

this.MyDataGridView.MouseDown += new System.Windows.Forms.MouseEventHandler(this.MyDataGridView_MouseDown);
this.DeleteRow.Click += new System.EventHandler(this.DeleteRow_Click);

PowerShell doesn't support += for event handler registration, but you have two other options. Either call the specially named methods that the C# ultimately converts += to - they will all have the form add_<EventName>:

$dataGridView = [System.Windows.Forms.DataGridView]::new()
# ...
$dataGridView.add_MouseDown($dgvMouseHandler)

Alternatively, use the Register-ObjectEvent cmdlet to let PowerShell handle the registration for you:

Register-ObjectEvent $dataGridView -EventName MouseDown -Action $dgvMouseHandler

Event arguments

private void MyDataGridView_MouseDown(object sender, MouseEventArgs e) {
    if(e.Button == MouseButtons.Right)
    {
        var hti = MyDataGridView.HitTest(e.X, e.Y);
        // ...

In order to consume the event handler arguments you can either declare the parameters defined by the handler delegate in the script block:

$dgvMouseHandler = {
  param($sender,[System.Windows.Forms.MouseEventArgs]$e)

  # now you can dereference `$e.X` like in the C# example
}

Or take advantage of the $EventArgs automatic variable:

$dgvMouseHandler = {
  # `$EventArgs.X` will also do
}
Mathias R. Jessen
  • 157,619
  • 12
  • 148
  • 206
  • Thanks for the detailed explanation! Im still fuzzy as to where in the script all of this happens. Does the argument go in the if statement for right click? Here's what ive got… #Add a DataGridView `$DataGridView.add_MouseDown($dgvMouseHandler) If ($_.Button -eq [System.Windows.Forms.MouseButtons]::Right){ $dgvMouseHandler = { param($sender,[System.Windows.Forms.MouseEventArgs]$e) } $HTI = $DataGridView.HitTest($e.x,$e.y) $DataGridView.ClearSelection() $DataGridView.Rows[$HTI.RowIndex].Selected = $true } $main_form.Controls.Add($DataGridView) ` – Jimbaland Jun 07 '21 at 14:42
  • @Jimbaland The `if` statement would go _inside the `$dvgMouseHandler`_ block, so it'd be `if($e.Button -eq ...)`, assuming you've declared the parameters as `param($sender,[MouseEventArgs]$e)` – Mathias R. Jessen Jun 07 '21 at 14:49
  • Placement of the If statement into the mouse handler block was the missing piece. Now working as intended. Ill vote this up once I get enough reputation points :) – Jimbaland Jun 07 '21 at 15:17