DataGridView Checkbox Cell detect check

Try this

((DataGridViewCheckBoxCell)e.Rows[0].Cells[0]).Selected = true

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i mean which even trigger do i need to use?

check this

If CBool(dataGridView1.Rows[e.RowIndex].Cells[0].Value) = True Then
      'Check box checked
Else
      'Check box Unchecked
End If

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Hi!

You an use CellContentClick event as other expert suggested, but i have another advice which i have experienced while working with Datagridview having checkboxColumn, sometimes when you checked a cell and want to access the value you will not get the updated value (like if you changed 'False' to 'True') you may get 'False'. So you should use:

DatagridView1.EndEdit() 

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before accessing the value the checkboxcell value.