求一个C#+ASP.NET发送邮件的代码

从MSDN帮助中抄来的：）<%-- 
This example shows how to send a mail message from a Web Forms page
using the classes in the System.Web.Mail namespace.
--%><%@ IMPORT namespace="System.Web.Mail" %><html>
   <script language=C# runat=server>
      void Page_Load()
      {
         if (!IsPostBack)
         {
            txtTo.Text="[email protected]";
            txtFrom.Text="[email protected]";
            txtCc.Text="[email protected]";
            txtBcc.Text="[email protected]";
            txtSubject.Text="Hello";
            txtBody.Text="This is a test message.";
            txtAttach.Text=@"C:\Documents and Settings\All Users\Documents\My Pictures\Sample Pictures\Sunset.jpg,"
               + @"C:\Documents and Settings\All Users\Documents\My Pictures\Sample Pictures\Winter.jpg";
        txtBodyEncoding.Text = Encoding.ASCII.EncodingName;
        txtBodyFormat.Text="HTML";
         txtPriority.Text="Normal";
        txtUrlContentBase.Text="http://www.contoso.com/images";
        txtUrlContentLocation.Text="http://www.contoso.com/images";
            // Name of relay mail server in your domain.
        txtMailServer.Text="smarthost";
         }
      }      void btnSubmit_Click(Object sender, EventArgs e)
      {
         string sTo, sFrom, sSubject, sBody;
         string sAttach, sCc, sBcc, sBodyEncoding;
         string sBodyFormat, sMailServer, sPriority;
         string sUrlContentBase, sUrlContentLocation;
     int iLoop1;     sTo = txtTo.Text.Trim();
     sFrom = txtFrom.Text.Trim();
     sSubject = txtSubject.Text.Trim();
     sBody = txtBody.Text.Trim();
     sAttach = txtAttach.Text.Trim();
     sCc = txtCc.Text.Trim();
     sBcc = txtBcc.Text.Trim();
     sBodyFormat = txtBodyFormat.Text.Trim();
     sBodyEncoding = txtBodyEncoding.Text.Trim();
     sPriority = txtPriority.Text.Trim();
     sUrlContentBase = txtUrlContentBase.Text.Trim();
     sUrlContentLocation = txtUrlContentLocation.Text.Trim();
     sMailServer = txtMailServer.Text.Trim();     MailMessage MyMail = new MailMessage();
     MyMail.From = sFrom;
     MyMail.To = sTo;
     MyMail.Subject = sSubject;
     MyMail.Body = sBody;
     MyMail.Cc = sCc;
     MyMail.Bcc = sBcc;
     MyMail.UrlContentBase = sUrlContentBase;
     MyMail.UrlContentLocation = sUrlContentLocation;         if (txtBodyEncoding.Text == Encoding.UTF7.EncodingName)
            MyMail.BodyEncoding = Encoding.UTF7;
         else if (txtBodyEncoding.Text == Encoding.UTF8.EncodingName)
            MyMail.BodyEncoding = Encoding.UTF8;
         else
            MyMail.BodyEncoding = Encoding.ASCII;     switch (sBodyFormat.ToUpper())
         {
            case "HTML": 
               MyMail.BodyFormat = MailFormat.Html;
               break;
            default: 
               MyMail.BodyFormat = MailFormat.Text;
               break;
         }
         
         switch (sPriority.ToUpper())
         {
            case "HIGH": 
               MyMail.Priority = MailPriority.High;
               break;
            case "LOW": 
               MyMail.Priority = MailPriority.Low;
               break;
            default: 
               MyMail.Priority = MailPriority.Normal;
               break;
         }
         
         // Build an IList of mail attachments.
         if (sAttach != "")
         {
            char[] delim = new char[] {','};
            foreach (string sSubstr in sAttach.Split(delim))
            {
               MailAttachment MyAttachment = new MailAttachment(sSubstr);
               MyMail.Attachments.Add(MyAttachment);
            }
         }
     
         SmtpMail.SmtpServer = sMailServer;
     SmtpMail.Send(MyMail);
     lblMsg1.Text="C# Message sent to " + MyMail.To;
      }      void btnClear_Click(Object sender, EventArgs e)
      {
         lblMsg1.Text="";
         txtTo.Text="";
         txtFrom.Text="";
         txtSubject.Text="";
         txtBody.Text="";
         txtAttach.Text="";
         txtBcc.Text="";
         txtCc.Text="";
     txtBodyEncoding.Text="";
     txtBodyFormat.Text="";
      txtPriority.Text="";
     txtUrlContentBase.Text="";
     txtUrlContentLocation.Text="";
     txtMailServer.Text="";
         btnSubmit.Text="Submit";
      }
   </script>   <p><h4>Send a new mail message:<h4></p>
   <Form method="Post" action="MailForm.aspx" runat=server>
      <table width="350" bgcolor="#FFFF99">
         <tr>
            <td Align="Right"><b>To:</b></td>
            <td><Asp:Textbox id="txtTo" runat=server/></td>
         </tr>
         <tr>
            <h4><td Align="Right"><b>From:</b></td></h4>
            <td><Asp:Textbox id="txtFrom" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>Subject:</b></td>
            <td><Asp:Textbox id="txtSubject" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>MessageBody:</b></td>
            <td><Asp:Textbox id="txtBody" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>Attachments:</b></td>
            <td><Asp:Textbox id="txtAttach" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>CC:</b></td>
            <td><Asp:Textbox id="txtBcc" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>BCC:</b></td>
            <td><Asp:Textbox id="txtCc" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>BodyEncoding:</b></td>
            <td><Asp:Textbox id="txtBodyEncoding" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>BodyFormat:</b></td>
            <td><Asp:Textbox id="txtBodyFormat" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>Priority:</b></td>
            <td><Asp:Textbox id="txtPriority" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>URL Content Base:</b></td>
            <td><Asp:Textbox id="txtUrlContentBase" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>URL Content Location:</b></td>
            <td><Asp:Textbox id="txtUrlContentLocation" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>Mail Server:</b></td>
            <td><Asp:Textbox id="txtMailServer" runat=server/></td>
         </tr>
      </table><br>      <asp:button id="btnSubmit" Text="Submit" OnClick="btnSubmit_Click" runat=server/>
      <asp:button id="btnClear" Text="Clear" OnClick="btnClear_Click" runat=server/>
      <p><asp:Label id="lblMsg1" runat=server/></p>
   </form>
</html>