导出到excel

以下代码未测试，复制的群里面的：

public void DataToExcel(DataGridView m_DataView)
{
SaveFileDialog kk = new SaveFileDialog();
kk.Title = "保存EXECL文件";
kk.Filter = "EXECL文件(*.xls) |*.xls |所有文件(*.*) |*.*";
kk.FilterIndex = 1;
if (kk.ShowDialog() == DialogResult.OK)
{
string FileName = kk.FileName + "";
//if (File.Exists(FileName))
// File.Delete(FileName);
FileStream objFileStream;
StreamWriter objStreamWriter;
string strLine = "";
objFileStream = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.Write);
objStreamWriter = new StreamWriter(objFileStream, System.Text.Encoding.Unicode);
for (int i = 0; i < m_DataView.Columns.Count; i++)
{
if (m_DataView.Columns[i].Visible == true)
{
strLine = strLine + m_DataView.Columns[i].HeaderText.ToString() + Convert.ToChar(9);
}
}
objStreamWriter.WriteLine(strLine);
strLine = "";

for (int i = 0; i < m_DataView.Rows.Count; i++)
{
if (m_DataView.Columns[0].Visible == true)
{
if (m_DataView.Rows[i].Cells[0].Value == null)
strLine = strLine + " " + Convert.ToChar(9);
else
strLine = strLine + m_DataView.Rows[i].Cells[0].Value.ToString() + Convert.ToChar(9);
}
for (int j = 1; j < m_DataView.Columns.Count; j++)
{
if (m_DataView.Columns[j].Visible == true)
{
if (m_DataView.Rows[i].Cells[j].Value == null)
strLine = strLine + " " + Convert.ToChar(9);
else
{
string rowstr = "";
rowstr = m_DataView.Rows[i].Cells[j].Value.ToString();
if (rowstr.IndexOf(" ") > 0)
rowstr = rowstr.Replace(" ", " ");
if (rowstr.IndexOf(" ") > 0)
rowstr = rowstr.Replace(" ", " ");
rowstr = rowstr = rowstr.Replace(Convert.ToChar(13).ToString(), " ");
strLine = strLine + rowstr + Convert.ToChar(9);
}
}
}
objStreamWriter.WriteLine(strLine);
strLine = "";
}
objStreamWriter.Close();
objFileStream.Close();
}
}

   private void button2_Click(object sender, EventArgs e)
        {
            DataToExcel(this.dataGridView1);
        }