Listview AutoReziseColumns not working - vb.net

Question

ListView1.AutoResizeColumns(ColumnHeaderAutoResizeStyle.HeaderSize)
Listview1.AutoResizeColumns(ColumnHeaderAutoResizeStyle.ColumnContent)
I'm having an issue since both of these lines separately produce the same result, which is resizing both the ColumnContent and the HeaderSize simultaneously.
I've searched and come up with no answer for this, i only need to resize by the HeaderSize but with the above example it seems not to be working correctly... or am i missing something?
And i've tested with more than one listview control...
Edit: I'm using it like this:
Private Sub UserListResize()
If Me.UserList.InvokeRequired Then
Me.UserList.Invoke(Sub() UserListResize())
Else
UserList.AutoResizeColumns(ColumnHeaderAutoResizeStyle.HeaderSize)
End If
End Sub
I'm calling this when i'm finished with adding items on the listview.

Answer 1

They dont do the exactly the same thing, but it is sometimes hard to tell them apart.
HeaderSize resizes each column to the greater of HeaderText.Length or longest cell content, thereby never clipping the header text.
ColumnContent resizes to longest cell content which will clip header text if the HeaderText is longer then the content. Test this with a column containing 1 or 2 digits/characters, but a long header like "FooBar Counter of Foo".
Neither mode will clip column text though, which means when you are economic with header text, it can look like they do the same thing. Other things to consider:
The LV must have items in it for ColumnContent to be meaningful
Inspite of Auto in the name, it is not a persistent setting - as soon as you add something else the layout may be incorrect, so you may have to reset it periodically.
You can always lay them out how you want and set AllowColumnResize to False
You set AutoResizeColumn on a per column basis (note it is singular)
Individual column widths can be "auto sized" using the Width Property and the Magic Numbers of -1 (set to content) or -2 (size to Header). This allows you to only apply the AutoResize logic to only some columns or use a different setting depending on the column:
For n As Integer = 0 To myLV.Columns.Count -1 Step 2 ' just do every other
myLV.Columns.Width = -2 ' -2 = size to column header text
' -1 = size to longest content
Next n
One place this is very handy is when adding columns dynamically. Rather than guessing at the TextExtent, you can set the new column's width to something at least somewhat applicable to start with, then change it the first time content is added. Reference: MSDN ColumnHeader Width Property.