How to set column width in GridListControl?

[Administrator]

I have GridListControl whose DataSource is being set to a collection. After doing this, the columns appear to resize themselves to be able to display all data, but I can''t seem to resize the columns the way I want them to look.

I found someone else asking a similar question in this thread: http://www.syncfusion.com/Support/Forums/message.aspx?MessageID=29020 . However, the code example posted doesn''t work with Option Strict On. This line gives an error:

Dim cr As GridDropDownGridListControlCellRenderer = cc.Renderer

I tried to get around this with a CType(), but the object "cr" always appears to end up as Nothing. Am I missing something here?

[Administrator]

The other code should be used only when a grid is using a GridListControl as a CellType, and only when the currentcell is one of these GridListControl CellTypes.

Another way to get the renderer from a grid celltype is to use code like:

Dim cr as GridDropDownGridListControlCellRenderer = CType(me.Grid.CellRenderers("GridListControl"), GridDropDownGridListControlCellRenderer)


But if you just have a GridListControl1 stand-alone on a form, then you can use like this to set the colwidths.

Me.gridListControl1.Grid.ColWidths(1) = 150

            

[Administrator]

Okay, I tried the new "Dim cr..." line of code you recomended, and cr was successfully set to something. However, the QueryColWidth never appears to fire.

This is, roughly, how my code looks (edited for simplicity). The owner of an instance of this class is meant to call the Populate method separately (it''s a little more complicated in my actual app), but I think that should affect anything. I''ve included it here just in case.

Public Class SyncFusionGridCombobox
Inherits Syncfusion.Windows.Forms.Tools.ComboBoxExt

'' The grid that will be displayed in the dropdown list
Public DropDownGrid As New GridListControl

Protected cc As GridCurrentCell
Protected cr As GridDropDownGridListControlCellRenderer
Protected glc As GridListControl

Public Sub New()

cc = DropDownGrid.Grid.CurrentCell
cr = CType(DropDownGrid.Grid.CellRenderers("GridListControl"), _
GridDropDownGridListControlCellRenderer)
AddHandler cr.ListControlPart.Grid.QueryColWidth, _
AddressOf QueryColWidthHandler

Me.ListControl = DropDownGrid
Me.PopupControl = DropDownGrid

End Sub

Protected Sub QueryColWidthHandler(ByVal sender As Object, _
ByVal e As GridRowColSizeEventArgs)

Console.WriteLine("QueryColWidth")

End Sub

Public Sub Populate()

Dim myColl As CustomCollection

'' Get a collection
myColl = New CustomCollection

'' Bind procedure collection to the grid
DropDownGrid.DataSource = myColl
DropDownGrid.DisplayMember = "Something"
DropDownGrid.ValueMember = "SomethingElse"

End Sub

End Class

The "cc =...","cr =...", and "AddHandler..." lines of code in the constructor seem to work fine, but it doesn''t look like QueryColWidth ever fires, since nothing is ever outputted to the Console window.

[Administrator]

You are not using a GridDropDownGridListControlCellRenderer. This object is used in a GridControl or GridDataBoundGrid when you set a style.CellType = "GridListControl".

You have a GridListControl being used as a dropdown in a ComboBoxExt. This is not using a GridDropDownGridListControlCellRenderer.

In your case, you can just explicitly set the widths if you want to. But if you want to subscribe to the QueryColWidth event to manage this too. Here is a sample that shows how to do either. First, just drop the combobox and note the colwidths. Then click each button and then drop the combo again to see the effect.

http://www.syncfusion.com/Support/user/uploads/GLC_In_Combobox_1323901a.zip

[Administrator]

I swear, setting the ColWidths property was the first thing I tried, but it didn''t work. Now it does. Go figure.