【原】将datagridview里的数据导出到excel（二）

private void ExportExcel(string fileName, DataGridView myDGV)
        {
if (myDGV.Rows.Count > 0)
            {
                SaveFileDialog saveFileDialog = new SaveFileDialog();
                saveFileDialog.DefaultExt = "xls";
                saveFileDialog.Filter = "EXCEL文件(*.XLS)|*.xls";
                saveFileDialog.FilterIndex = 0;
                saveFileDialog.FileName =fileName;
                saveFileDialog.RestoreDirectory = true;
                saveFileDialog.CreatePrompt = true;
                saveFileDialog.Title = "导出到EXCEL";
                saveFileDialog.ShowDialog();
                if (saveFileDialog.FileName == "")
                    return;
                Stream myStream;
                myStream = saveFileDialog.OpenFile();
                StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0));
                string str = "";
                try
                {
                    for (int i = 0; i < dataGridView1.ColumnCount; i++)
                    {
                        if (i > 0)
                        {
                            str += "\t";
                        }
                        str += dataGridView1.Columns[i].HeaderText;
                    }
                    sw.WriteLine(str);
                    for (int j = 0; j < dataGridView1.Rows.Count; j++)
                    {
                        string tempStr = "";
                        for (int k = 0; k < dataGridView1.Columns.Count; k++)
                        {
                            if (k > 0)
                            {
                                tempStr += "\t";
                            }
                            tempStr += dataGridView1.Rows[j].Cells[k].Value.ToString();
                        }
                        sw.WriteLine(tempStr);
                    }
                    sw.Close();
                    myStream.Close();
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.ToString());
                }
                finally
                {
                    sw.Close();
                    myStream.Close();
                }
            }
}