DateGridView读取其中一行的一个单元格的值后失去焦点怎么回事

private void DgvHeaders_CellClick_1(object sender, DataGridViewCellEventArgs e)
  {
  try
  {
  m_OrderID = this.DgvHeaders.Rows[e.RowIndex].Cells["colOrderID"].Value.ToString();
  string IsOut = this.DgvHeaders.Rows[e.RowIndex].Cells["colIsOut"].Value.ToString();
  _IsOutBound = int.Parse(IsOut);
  }
  catch (Exception ex)
  {
  AppHelper.MsgWarn(ex.Message);
  return;
  }

  this.btnOut.Enabled = true;

  }


m_OrderID = this.DgvHeaders.Rows[e.RowIndex].Cells["colOrderID"].Value.ToString();
执行完之后就报错了  

看看this.DgvHeaders.Rows[e.RowIndex].Cells["colOrderID"].Value里面的值是否是NULL

+1

看this.DgvHeaders.Rows[e.RowIndex].Cells["colOrderID"]是否为NULL

调试看e.RowIndex的值是多少


用 DgvHeaders.CurrentRow.Index试一下

判断是否为null
DataGridView.ClearSelection();  
DataGridView.CurrentCell = a.Rows[4].Cells[0];设置焦点