private void toolStripMenuItem_Excel_Click(object sender, EventArgs e)
{
SaveFileDialog save = new SaveFileDialog()
{
Filter = "Microsoft Excel Files (*.xlsx)|*.xlsx",
FileName = "SavedDocument"
};
if (save.ShowDialog() == DialogResult.OK)
{
string ext = System.IO.Path.GetFullPath(save.FileName);
sql.ExportExcel2007(ext, table_DSHuyen);
}
}