GridView as email attachment

How do I send the contents of a GridView as an email attachment?

GridView can be rendered into a string using the RenderControl() method. From the string, a buffer (of bytes) can be extracted assuming ASCII encoding. This buffer can be used as email attachment by streaming it through a MemoryStream object. The code is below:

protected void Submit_Click(object sender, EventArgs e)
{
    // Render the contents of the GridView into a string
    StringBuilder sb = new StringBuilder();
    StringWriter sw = new StringWriter(sb);
    HtmlTextWriter htw = new HtmlTextWriter(sw);
    GridView1.RenderControl(htw);

    // Get the byte buffer from the string
    byte[] buffer = new byte[sb.Length];
    ASCIIEncoding enc = new ASCIIEncoding();
    buffer = enc.GetBytes(sb.ToString());

    // Create attachment from MemoryStream
    MemoryStream ms = new MemoryStream(buffer);
    Attachment att = new Attachment(ms, "GridReport.xls");
}