public delegate void AsyncDelegate();
        public void ShowChild()//弹出子窗体
        {
            CFrmChild FrmChild = new CFrmChild(dgv.CurrentRow);           
            FrmChild.ShowDialog();
        }
        private void dgv_CellDoubleClick(object sender, DataGridViewCellEventArgs e)//双击弹出子窗体
        {
            AsyncDelegate dlgt = new AsyncDelegate(this.ShowChild);
            IAsyncResult ar = dlgt.BeginInvoke(null, null);
            dlgt.EndInvoke(ar);           
        }

private DataGridViewRow dgvrMain;  
public CFrmChild(DataGridViewRow dgvr)
        {
            InitializeComponent();
            this.dgvrMain = dgvr;
            //txtNum.Text = dgvr.Cells["ZHLDAH"].Value.ToString();
            txtNum.DataBindings.Add("Text", dgvr.DataBoundItem, "ZHLDAH");//质量档案编号
            txtNote.DataBindings.Add("Text", dgvr.DataBoundItem, "ZHUYSX");//注意事项
        }
private void btnOK_Click(object sender, EventArgs e)//确定
        {
            dgvrMain.Cells["ZHLDAH"].Value = txtNum.Text;
            dgvrMain.Cells["ZHUYSX"].Value = txtNote.Text;
            this.Close();
        }