private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)    //此处是用删除键
        {
            try            //捕捉异常
            {
                if (listView1.SelectedItems.Count == 0)    //如果没有选中数据提示
                {
                    MessageBox.Show("请选定数据删除！");
                    return;
                }
                【【【//在此处用代码控制键盘DELETE删除，高手求解，明天就项目答辩了，我想让代码更具人性化。】】】
                DBconnection.conn.Open();    //打开数据库
                int index = listView1.FocusedItem.Index;    //获取列表子项焦点
                String question = listView1.Items[index].Text;
                if (MessageBox.Show("确定要删除吗？", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Asterisk) == DialogResult.Yes)
                {
                    String strsql = "delete from Question  where Question='" + question + "'";
                    SqlCommand command = new SqlCommand(strsql, DBconnection.conn);
                    int n = command.ExecuteNonQuery();
                    if (n > 0)
                    {
                        MessageBox.Show("删除成功！");

                    }
                    else
                    {
                        MessageBox.Show("删除失败！");
                    }
                }     
            }
            catch (Exception ex)
            {
                MessageBox.Show("连接数据库出错了," + ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {
                DBconnection.conn.Close();    //关闭数据库，节省系统资源
            }

在OnKeyDown事件中，判断如果按下的是delete键就执行删除代码

老师能说的详细点吗？比如对应上述代码该如何实现，谢谢

1.设置窗体属性 KeyPreview 为True.
2.添加事件
         protected override void OnKeyDown(KeyEventArgs e)
        {
            //46是按下的delete键
            if (e.KeyValue == 46 && listView1.SelectedItems.Count!=0)
            {
                //删除选中数据
            }
            base.OnKeyDown(e);
        }

解决啦！！！谢谢老师啦！可不可以冒昧交个朋友啊，以后遇到问题时可以找您

不客气的，共同学习交流。