How to hide option from filter bar dropdown list in WinForms GridGroupingControl?

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Hide the custom option

To remove the (Custom….) option from the FilterBar dropdown list, you need to customize GridListFilterBarCellRenderer using TableControlCurrentCellShowingDropDown, TableControlCurrentCellCloseDropDown events.

private void gridGroupingControl1_TableControlCurrentCellCloseDropDown(object sender, GridTableControlPopupClosedEventArgs e) 
{    GridCurrentCell cc = e.TableControl.CurrentCell;    if ((cc.Renderer.GetType() == GridListFilterBarCellRenderer)) 
    {       GridListFilterBarCellRenderer renderer = ((GridListFilterBarCellRenderer)(cc.Renderer));       if (((renderer.ListControlPart.SelectedIndex >= 1)                         && (renderer.ListControlPart.SelectedIndex                         <= (renderer.ListControlPart.Items.Count - 1)))) 
       {           renderer.ListControlPart.SelectedIndex = (renderer.ListControlPart.SelectedIndex + 1);       }    }}
private void gridGroupingControl1_TableControlCurrentCellShowingDropDown(object sender, GridTableControlCurrentCellShowingDropDownEventArgs e) 
{    GridCurrentCell cc = e.TableControl.CurrentCell;    if ((cc.Renderer.GetType() == GridListFilterBarCellRenderer)) 
    {        GridListFilterBarCellRenderer renderer = ((GridListFilterBarCellRenderer)(cc.Renderer));        GridTableCellStyleInfo tableStyleInfo = ((GridTableCellStyleInfo)(renderer.StyleInfo));        renderer.ListControlPart.Items.RemoveAt(1);    }}

VB:

Private Sub gridGroupingControl1_TableControlCurrentCellCloseDropDown(ByVal sender As Object, ByVal e As GridTableControlPopupClosedEventArgs)
     Dim cc As GridCurrentCell = e.TableControl.CurrentCell
     If (TypeOf cc.Renderer Is GridListFilterBarCellRenderer) Then
        Dim renderer As GridListFilterBarCellRenderer = CType(cc.Renderer,GridListFilterBarCellRenderer)
        If ((renderer.ListControlPart.SelectedIndex >= 1)  _
           AndAlso (renderer.ListControlPart.SelectedIndex  _
           <= (renderer.ListControlPart.Items.Count - 1))) Then
           renderer.ListControlPart.SelectedIndex = (renderer.ListControlPart.SelectedIndex + 1)
        End If
     End If
End Sub

Private Sub gridGroupingControl1_TableControlCurrentCellShowingDropDown(ByVal sender As Object, ByVal e As GridTableControlCurrentCellShowingDropDownEventArgs)
     Dim cc As GridCurrentCell = e.TableControl.CurrentCell
     If (TypeOf cc.Renderer Is GridListFilterBarCellRenderer) Then
        Dim renderer As GridListFilterBarCellRenderer = CType(cc.Renderer,GridListFilterBarCellRenderer)
        Dim tableStyleInfo As GridTableCellStyleInfo = CType(renderer.StyleInfo,GridTableCellStyleInfo)
        renderer.ListControlPart.Items.RemoveAt(1)
     End If
End Sub

Sample:

https://www.syncfusion.com/downloads/support/directtrac/general/HidingOption_FilterBar-682653859.zip

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How to hide option from filter bar dropdown list in WinForms GridGroupingControl?

Hide the custom option

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