DataGrid中的DataGridCheckBoxColumn用法

<my:DataGridCheckBoxColumn Header="选中" x:Name="checkBox" IsReadOnly="False" CanUserResize="False" Width="35" />  private void btnDeleteNote_Click(object sender, RoutedEventArgs e)        {            for (int i = 0; i < this.dgvNotesManage.Items.Count; i++)            {                var cntr = dgvNotesManage.ItemContainerGenerator.ContainerFromIndex(i);                DataGridRow ObjROw = (DataGridRow)cntr;                if (ObjROw != null)                {                    FrameworkElement objElement = dgvNotesManage.Columns[0].GetCellContent(ObjROw);                    if (objElement != null)                    {                        if (objElement.GetType().ToString().EndsWith("CheckBox"))                        {                            System.Windows.Controls.CheckBox objChk = (System.Windows.Controls.CheckBox)objElement;                            if (objChk.IsChecked == true)                            {                                //if (System.Windows.MessageBox.Show("确认删除此公告？", "确认公告删除", MessageBoxButton.YesNo) == MessageBoxResult.Yes)                                //{                                string noteId = ((DataRowView)this.dgvNotesManage.Items[i])["NoteId"].ToString();                                string sql = string.Format("DELETE  FROM OODBS_NoteUser WHERE NoteId='{0}'", noteId);                                bool flag2 = new CommunicationShare.Proxy.ProxyClient().DeleteNoteObject(sql);                                sql = string.Format("DELETE  FROM OODBS_Notes WHERE NoteId='{0}'", noteId);                                bool flag1 = new CommunicationShare.Proxy.ProxyClient().DeleteNote(sql);                            }                        }                    }                }            }            BindNoteManage();        }//单击某行即选中那行的CheckBox        private void dgvNotesManage_SelectionChanged(object sender, SelectionChangedEventArgs e)        {            var cntr = dgvNotesManage.ItemContainerGenerator.ContainerFromIndex(dgvNotesManage.SelectedIndex);            DataGridRow ObjROw = (DataGridRow)cntr;            if (ObjROw != null)            {                FrameworkElement objElement = dgvNotesManage.Columns[0].GetCellContent(ObjROw);                if (objElement != null)                {                    if (objElement.GetType().ToString().EndsWith("CheckBox"))                    {                        System.Windows.Controls.CheckBox objChk = (System.Windows.Controls.CheckBox)objElement;                        if (objChk.IsChecked == true)                        {                            objChk.IsChecked = false;                        }                        else                            objChk.IsChecked = true;                    }                }            }        }