选择listview数据,传给另外一个窗口

private void toolStripButton2_Click(object sender, EventArgs e)//修改用户信息

        {

            try

            {

                if (lvwuser.SelectedItems[0].Index != -1)//listview在选择数据时

                {

                    ListViewItem olditem = lvwuser.SelectedItems[0];

                    a = olditem.SubItems[0].Text;   //把选择的数据传给另外一个窗口

                    b = olditem.SubItems[1].Text;

                    frmuserupdate frmup = new frmuserupdate();

                    if (frmup.ShowDialog() == DialogResult.OK)  //在另外一个窗口关闭时，返回OK就就刷新listview里的数据

                    {

                        pbvar.getlvw(lvwuser, strcomm);

                    }

                }

            }

            catch

            {

                MessageBox.Show("请选择修改的用户信息！");

            }

        }