DataGrid Column AutoSizemode = Fill doesn't (always) work

Hi,

Attached an Issue I ran into while loading a DatagridView at runtime while also setting their column properties.

To reproduce (attached is a sample):

1. Add a DatagridView to a page
2. at page load:
3. Private Sub Page1_Load(sender As Object, e As EventArgs) Handles Me.Load
   DataGridView1.Columns.Add(“P_ID”)
   DataGridView1.Columns.Add(“Message”)
   DataGridView1.Columns.Add(“SenderName”)
   DataGridView1.Columns.Add(“SendDate”)For a As Integer = 1 To 10
   DataGridView1.Rows.Add(a, “I should be filled no?”, “Admin”, Now.ToString)
   Next

   With DataGridView1

   With .Columns(“P_ID”)
   .Visible = False
   End With

   With .Columns(“Message”)
   .HeaderText = “Bericht”
   .AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill
   .MinimumWidth = 300
   End With

   With .Columns(“SenderName”)
   .HeaderText = “Door”
   .AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells

   End With

   With .Columns(“SendDate”)
   .HeaderText = “Datum”

   .AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells

   End With

   End With
   End Sub

4. Run

Column “Message” should have the maximum available width but it is stuck at 300. If I were to add the columns at design time and set these properties the grid seems to work fine.

I’m running the 3.5.15-Preview

Thanks

Vincent