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DataGridView with CheckBox at Header

    Question

  • Hello,

    How to add a Check Box in the header of a check box column? I need to add a check box in the header.

    Wednesday, May 16, 2012 5:20 AM

Answers

All replies

  • You cannot add a checkbox in a Row Header, 

    Please describe next time more exact that you want,  now I see what you want. 

    It is simply not possible for that you need 3rd party grids or use WPF (I assume the WPF datagrid will also not fit like, you have to design it completely yourself).

    However, you can make of course the rowheader invisible and use the first column


    Success
    Cor



    Wednesday, May 16, 2012 8:33 AM
  • Not supported by the DataGridView, but you can add one. I used the code from the below link:

    http://www.brianpautsch.com/Blog/2006/10/10/DataGridView/

    Private _selectAll As Boolean = False
    
    'Fill your DataGridView then add the CheckBox column:
    
    DataGridView1.Columns.Insert(0, New DataGridViewCheckBoxColumn())
    
    
        Private Sub DataGridView1_CellPainting(sender As Object, e As System.Windows.Forms.DataGridViewCellPaintingEventArgs) Handles DataGridView1.CellPainting
    
            'Is this the checkbox column header?
            If e.RowIndex = -1 AndAlso e.ColumnIndex = 0 Then
                Try
                    'Erase the cell
                    Using backColorBrush As Brush = New SolidBrush(e.CellStyle.BackColor)
                        e.Graphics.FillRectangle(backColorBrush, e.CellBounds)
                    End Using
    
                    'Draw 1 bottom line...
                    e.Graphics.DrawLine(Pens.DarkGray, e.CellBounds.Left, e.CellBounds.Bottom - 1, e.CellBounds.Right, e.CellBounds.Bottom - 1)
                    'Draw 2 top lines...
                    e.Graphics.DrawLine(Pens.DarkGray, e.CellBounds.Left, e.CellBounds.Top, e.CellBounds.Right, e.CellBounds.Top)
                    e.Graphics.DrawLine(Pens.White, e.CellBounds.Left, e.CellBounds.Top + 1, e.CellBounds.Right, e.CellBounds.Top + 1)
                    'Draw right line...
                    e.Graphics.DrawLine(Pens.DarkGray, e.CellBounds.Right - 1, e.CellBounds.Top, e.CellBounds.Right - 1, e.CellBounds.Bottom)
                    'Draw left line...
                    e.Graphics.DrawLine(Pens.White, e.CellBounds.Left, e.CellBounds.Top, e.CellBounds.Left, e.CellBounds.Bottom)
    
                    'Get the image from the resource file
                    Dim imgChecked As Image = CType(Code_Examples.My.Resources.Resource1.checked, Image)
                    Dim imgUnchecked As Image = CType(Code_Examples.My.Resources.Resource1.unchecked, Image)
    
                    'Determine paint coordinates
                    Dim X As Integer = e.CellBounds.Left + ((e.CellBounds.Width - imgChecked.Width) / 2) - 1
                    Dim Y As Integer = e.CellBounds.Top + ((e.CellBounds.Height - imgChecked.Height) / 2) - 1
    
                    'Draw checkbox in header
                    If _selectAll Then
                        e.Graphics.DrawImage(imgChecked, X, Y)
                    Else
                        e.Graphics.DrawImage(imgUnchecked, X, Y)
                    End If
    
                    'Set event as handled
                    e.Handled = True
                Catch
                    'Handle exception
                End Try
            End If
        End Sub
    
    Private Sub DataGridView1_ColumnHeaderMouseClick(sender As Object, e As System.Windows.Forms.DataGridViewCellMouseEventArgs) Handles DataGridView1.ColumnHeaderMouseClick
    
            If e.ColumnIndex = 0 Then
                _selectAll = Not _selectAll
                For i As Integer = 0 To DataGridView1.Rows.Count - 1
                    DataGridView1.Rows(i).Cells(0).Value = _selectAll
                Next i
            End If
    
    End Sub


    Paul ~~~~ Microsoft MVP (Visual Basic)

    Wednesday, May 16, 2012 1:59 PM
  • One good solution can be found here:

    CheckBox in Header Cell of DataGridView Control


    Pradeep, Microsoft MVP (Visual Basic)
    http://pradeep1210.wordpress.com

    Monday, May 21, 2012 1:00 AM