代码 
//binding data from xml file to datagridview
DataSet ds = new DataSet();
ds.ReadXml("dataFile.xml");//xml file placed in bin/Debug folder
dataGridView1.DataSource = ds;
dataGridView1.DataMember = "authors"; 

private StringBuilder htmlMessageBody(DataGridView dg)
{
    StringBuilder strB = new StringBuilder();
    //create html & table
    strB.AppendLine("<html><body><center><" + 
                    "table border='1' cellpadding='0' cellspacing='0'>");
    strB.AppendLine("<tr>");
    //cteate table header
    for (int i = 0; i < dg.Columns.Count; i++)
    {
        strB.AppendLine("<td align='center' valign='middle'>" + 
                        dg.Columns[i].HeaderText + "</td>");
    }
    //create table body
    strB.AppendLine("<tr>");
    for (int i = 0; i < dg.Rows.Count; i++)
    {
        strB.AppendLine("<tr>");
        foreach (DataGridViewCell dgvc in dg.Rows[i].Cells)
        {
            strB.AppendLine("<td align='center' valign='middle'>" + 
                            dgvc.Value.ToString() + "</td>");
        }
        strB.AppendLine("</tr>");

    }
    //table footer & end of html file
    strB.AppendLine("</table></center></body></html>");
    return strB;} 

    // Create a message with datagridview contents
    // in its body and set up the recipients.
    MailMessage myMessage = new MailMessage();
    try
    {
        myMessage.From = "from@yourDomain.com";//place here from address
        myMessage.To = "to@recipientsDomain";//place here to address
        myMessage.Cc = "cc@someDomain.com";//place here copy address
        myMessage.BodyEncoding = Encoding.UTF8;
        myMessage.BodyFormat = MailFormat.Html;
        //call method, creating HTML from datagridview
        myMessage.Body = htmlMessageBody(dataGridView1).ToString();
        //place here your subject
        myMessage.Subject = "message subject";

        //if it is needed set up credentials
        myMessage.Fields.Add("http://schemas.microsoft.com/cdo/" + 
                             "configuration/smtpauthenticate", 
                             "1");//Basic Authentication
        myMessage.Fields.Add("http://schemas.microsoft.com/cdo/" + 
                             "configuration/sendusername", 
                             "userName");//user name
        myMessage.Fields.Add("http://schemas.microsoft.com/cdo/" + 
                             "configuration/sendpassword", 
                             "password");//password
        //place here SMTP server
        SmtpMail.SmtpServer = "your SMTP server";
        SmtpMail.Send(myMessage);
        MessageBox.Show("Message sent!");
    }
    catch (Exception ex)
    {
        MessageBox.Show("Error! "+ex.Message);
    }
       
    //create message with datagridview contents in attachment
    MailMessage myMessage = new MailMessage();
    try
    {
        myMessage.From = "from@yourDomain.com";//place here from address
        myMessage.To = "to@recipientsDomain";//place here to address
        myMessage.Cc = "cc@someDomain.com";//place here copy address
        myMessage.BodyEncoding = Encoding.UTF8;
        myMessage.BodyFormat = MailFormat.Html;
        myMessage.Body = "some body text";//place here some text
        myMessage.Subject = "message subject";//place here your subject
        //creating attachment
        StreamWriter sw = new StreamWriter("file.html", 
                          true, Encoding.UTF8);//creating html file
        //write datagridview contents to HTML file
        sw.Write(htmlMessageBody(dataGridView1).ToString());
        sw.Close();
        //create attachment
        MailAttachment myAttach = new MailAttachment("file.html");
        myMessage.Attachments.Add(myAttach);//add attachment to our message

        //if it is needed set up credentials
        myMessage.Fields.Add("http://schemas.microsoft.com/cdo/" + 
                             "configuration/smtpauthenticate", 
                             "1");//Basic Authentication
        myMessage.Fields.Add("http://schemas.microsoft.com/cdo/" + 
                             "configuration/sendusername", 
                             "userName");//user name
        myMessage.Fields.Add("http://schemas.microsoft.com/cdo/" + 
                             "configuration/sendpassword", 
                             "password");//password
        //place here SMTP server
        SmtpMail.SmtpServer = "your SMTP server";
        SmtpMail.Send(myMessage);
        MessageBox.Show("Message sent!");
    }
    catch (Exception ex)
    {
        MessageBox.Show("Error! " + ex.Message);
    }