How to replace the filter bar cell text as empty instead of “(All)” in WinForms GridGroupingControl?

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Replace the filter bar cell text

In GridGroupingControl, filter bar cell text is “(All)” by default as in the following screenshot.

Filter bar cell text is All in Grid

Figure 1: Filter bar cell text is “(All)” in Grid

To replace the filter bar cell text as empty instead of “(All)”, you can use the TableControlDrawCellDisplayText event. The following code example is used to set filter bar text as Empty.

//Event hooking.
this.gridGroupingControl1.TableControlDrawCellDisplayText += new GridTableControlDrawCellDisplayTextEventHandler(gridGroupingControl1_TableControlDrawCellDisplayText);
void gridGroupingControl1_TableControlDrawCellDisplayText(object sender, GridTableControlDrawCellDisplayTextEventArgs e)
{
   GridTableCellStyleInfo style = this.gridGroupingControl1.TableControl.GetTableViewStyleInfo(e.Inner.RowIndex,e.Inner.ColIndex);
   if(e.Inner.DisplayText == "(All)" && style.TableCellIdentity.TableCellType== GridTableCellType.FilterBarCell)
   {
      // restrict the filter bar display text, if it's '(All)'.
      e.Inner.Cancel = true;
   }
}

'Event hooking.
Private Me.gridGroupingControl1.TableControlDrawCellDisplayText += New GridTableControlDrawCellDisplayTextEventHandler(AddressOf gridGroupingControl1_TableControlDrawCellDisplayText)
Private Sub gridGroupingControl1_TableControlDrawCellDisplayText(ByVal sender As Object, ByVal e As GridTableControlDrawCellDisplayTextEventArgs)
   Dim style As GridTableCellStyleInfo = Me.gridGroupingControl1.TableControl.GetTableViewStyleInfo(e.Inner.RowIndex,e.Inner.ColIndex)
   If e.Inner.DisplayText = "(All)" AndAlso style.TableCellIdentity.TableCellType= GridTableCellType.FilterBarCell Then
      ' restrict the filter bar display text, if it's '(All)'.
      e.Inner.Cancel = True
   End If
End Sub

After removing “(All)” from filter bar cell text, the Grid is displayed as follows.

Show filter bar cell text All is removed