C#实现将数据导出到word或者Excel中的方法

void OutToWord()
{
 if (dataGridView1.Rows.Count >= 1)
 {
 string tempstr ="";
 Stream myStream;
 SaveFileDialog dlg =new SaveFileDialog();
 dlg.Filter = "(Word文件)*.doc|*.doc";
 //dlg.Filter = "(Word文件)*.xls|*.xls";
 dlg.FilterIndex = 2;
 dlg.RestoreDirectory = true;
 if (dlg.ShowDialog() ==DialogResult.OK)
 {
  if ((myStream = dlg.OpenFile()) !=null)
  {
  StreamWriter sw =new StreamWriter(myStream,Encoding.GetEncoding("gb2312"));
  string str ="";
  try
  {
   for (int i = 0; i < dataGridView1.ColumnCount; i++)
   {
   if (i > 0) str +="\t\t";
   str += dataGridView1.Columns[i].HeaderText;
   }
   sw.WriteLine(str);
   for (int j = 0; j < dataGridView1.Rows.Count - 1; j++)
   {
   tempstr = "";
   for (int k = 0; k < dataGridView1.Columns.Count; k++)
   {
    if (k > 0) tempstr +="\t\t";
    tempstr += dataGridView1.Rows[j].Cells[k].Value.ToString();
   }
    sw.WriteLine(tempstr);
   }
   sw.Close();
   myStream.Close();
   MessageBox.Show("已将信息导出到word","提示");
   }
  catch (Exception ex)
  {
   MessageBox.Show(ex.ToString());
  }
  finally
  {
   sw.Close();
   myStream.Close();
  }
  }
 }
}