private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            tb.Text+=string.Format("\r\n{0}，Row:{1}，Column:{2}","单元格内容单击！",e.RowIndex,e.ColumnIndex);
        }

        private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            tb.Text += string.Format("\r\n{0}，控件名:{1}", "单元格控件编辑！", e.Control.GetType());
            if (e.Control.GetType().Equals(typeof(DataGridViewComboBoxEditingControl)))
            {
                    DataGridViewComboBoxEditingControl editingControl = e.Control as DataGridViewComboBoxEditingControl;
                    try
                    {
                        editingControl.DropDownClosed -= new EventHandler(editingControl_DropDownClosed);
                    }
                    catch
                    {
                    }
                    editingControl.DropDownClosed += new EventHandler(editingControl_DropDownClosed);
            }
            else if (e.Control.GetType().Equals(typeof(DataGridViewTextBoxEditingControl)))
            {
                    DataGridViewTextBoxEditingControl editingControl = e.Control as DataGridViewTextBoxEditingControl;
                    try
                    {
                    }
                    catch
                    {
                    }
            }

        }
        private void editingControl_DropDownClosed(object sender, EventArgs e)
        {
            DataGridViewComboBoxEditingControl ctl = sender as DataGridViewComboBoxEditingControl;
            int r = dataGridView1.CurrentCell.RowIndex;
            int c = dataGridView1.CurrentCell.ColumnIndex;
            tb.Text += string.Format("\r\n{0}，控件名:{1}", "单元格下拉框下拉！", ctl.GetType());
            dataGridView1.CellValueChanged -= dataGridView1_CellValueChanged;
        }

        private void dgvJointList_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
        {
            int r = dgvJointList.CurrentCell.RowIndex;
            int c = dgvJointList.CurrentCell.ColumnIndex;
            if (dgvJointList.Columns["diameter"].Index == c ||
                dgvJointList.Columns["thickness"].Index == c ||
                dgvJointList.Columns["weldLength"].Index == c)
            {
                string txt = dgvJointList.CurrentCell.EditedFormattedValue.ToString();
                string errorMsg;
                if (!ValidNumericFF(txt, out errorMsg))
                {
                    e.Cancel = true;
                    this.errorProvider1.SetError(dgvJointList, errorMsg);
                }
                else
                {
                    this.errorProvider1.SetError(dgvJointList, "");
                }
            }
        }