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How to remove a column from grid while dragging that column outside of column header section in WinForms GridGroupingControl?

Platform: WinForms |
Control: GridGroupingControl |
Published Date: September 26, 2016 |
Last Revised Date: December 24, 2019

Remove a header column

In order to remove a column while dragging that column outside of the column header section, the Tablecontrol.MouseUp and TableControl.MouseDown events can be handled. The TableControl.MouseDown is used to get the header column and that retrieved column can be removed by using VisibleColumns property in Tablecontrol.MouseUp.

C#

//Event subscription.
this.gridGroupingControl1.TableControl.MouseDown += new MouseEventHandler(TableControl_MouseDown);
this.gridGroupingControl1.TableControl.MouseUp += new MouseEventHandler(TableControl_MouseUp);
 
//Handling the TableControl_MouseUp event.
void TableControl_MouseUp(object sender, MouseEventArgs e)
{
    GridTableControl tableControl = sender as GridTableControl;
    int rowIndex, colIndex;
    tableControl.PointToRowCol(e.Location, out rowIndex, out colIndex);
 
    GridTableCellStyleInfo style = tableControl.GetTableViewStyleInfo(rowIndex, colIndex);
    if (style.TableCellIdentity.DisplayElement.Kind != DisplayElementKind.ColumnHeader && column != null)
              this.gridGroupingControl1.TableDescriptor.VisibleColumns.Remove(column.ToString());
    column = null;
}
 
//Handling the TableControl_MouseDown event.
void TableControl_MouseDown(object sender, MouseEventArgs e)
{
    GridTableControl tableControl = sender as GridTableControl;
    GridTableCellStyleInfo style = (GridTableCellStyleInfo)tableControl.PointToTableCellStyle(new Point(e.X, e.Y));
 
    if (style.TableCellIdentity.DisplayElement.Kind == DisplayElementKind.ColumnHeader)
        column = style.TableCellIdentity.Column;
}

 

VB

'Event subscription.
AddHandler gridGroupingControl1.TableControl.MouseDown, AddressOf TableControl_MouseDown
AddHandler gridGroupingControl1.TableControl.MouseUp, AddressOf TableControl_MouseUp
 
'Handling the TableControl_MouseUp event.
Private Sub TableControl_MouseUp(ByVal sender As Object, ByVal e As MouseEventArgs)
      Dim tableControl As GridTableControl = TryCast(sender, GridTableControl)
      Dim rowIndex, colIndex As Integer
             tableControl.PointToRowCol(e.Location, rowIndex, colIndex)
 
      Dim style As GridTableCellStyleInfo = tableControl.GetTableViewStyleInfo(rowIndex, colIndex)
      If style.TableCellIdentity.DisplayElement.Kind <> DisplayElementKind.ColumnHeader AndAlso column IsNot Nothing Then
              Me.gridGroupingControl1.TableDescriptor.VisibleColumns.Remove(column.ToString())
      End If
      column = Nothing
End Sub
 
'Handling the TableControl_MouseDown event.
Private Sub TableControl_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
      Dim tableControl As GridTableControl = TryCast(sender, GridTableControl)
      Dim style As GridTableCellStyleInfo = CType(tableControl.PointToTableCellStyle(New Point(e.X, e.Y)), GridTableCellStyleInfo)
 
      If style.TableCellIdentity.DisplayElement.Kind = DisplayElementKind.ColumnHeader Then
          column = style.TableCellIdentity.Column
      End If
End Sub

Screenshot

Before remove the columns in header

After removing column

After remove the column in header

Samples:

C#: Removing_Columns

VB: Removing_Columns

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