private void bt_save_Click(object sender, EventArgs e)
{
if (object.Equals(null, dt_ggdy.GetChanges()))
{
return;
}
xtbiz.Update_Table(dt_ggdy, "select ID,PageName,PaperName,PageWidth,PageHeight,MarginTop,MarginLeft,MarginRight,MarginBottom,PagePrinter,sm,tybz from xt_ggdy");
MessageBox.Show("保存成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
dt_ggdy = xtbiz.Get_All_Xt_ggdy();
dgv_ggdy.DataSource = dt_ggdy;
}