ASP.NET 邮件发送 System.Net.Mail(2)

29         </tr>
30         <tr>
31             <td class="style5">
32                 邮件内容：
33             </td>
34             <td class="style6">
35                 <asp:TextBox ID="tb_Body" runat="server" Height="63px" TextMode="MultiLine" Width="266px"></asp:TextBox>
36             </td>
37         </tr>
38         <tr>
39             <td class="style5">
40                 添加附件：
41             </td>
42             <td class="style6">
43                 <asp:FileUpload ID="tb_Attachment" runat="server" Width="265px" />
44             </td>
45         </tr>
46         <tr>
47             <td align="right" colspan="2">
48                 <asp:Button ID="btn_SendEmail" runat="server" Text="发送邮件" OnClick="btn_SendEmail_Click" />
49             </td>
50         </tr>
51     </table>

• 后台SendEmail.aspx.cs代码
 1 protected void btn_SendEmail_Click(object sender, EventArgs e)
 2         {
 3             //声明一个Mail对象
 4             MailMessage mymail = new MailMessage();
 5             //发件人地址