private void MenuFileSaveXls_Click(object sender, EventArgs e)//保存表格
{
saveFileDialog1.Filter = "(xls文件)|*.xls";
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
FileHelper.Savexls(saveFileDialog1.FileName, Obs.ToDataTable());
// MessageBox.Show("保存表格成功", "信息提示");
}
}