HYPDM.WinUI.ProductsAndParts.Parts.PartsStructAddForm.dgv_PartsList_CellContentClick C# (CSharp) Method

        private void dgv_PartsList_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.ColumnIndex != 0 || e.RowIndex == -1) return;

            for (int i = 0; i < dgv_PartsList.Rows.Count; i++)
            {
                DataGridViewCheckBoxCell checkcell = (DataGridViewCheckBoxCell)this.dgv_PartsList.Rows[i].Cells[0];
                if (e.RowIndex == i){
                    checkcell.Value = !Convert.ToBoolean(checkcell.Value);
                }else{
                    checkcell.Value = false;
                }
            }
        }