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望指教，怎么用？
可以自己写啊
<INPUT id="picFile" type="file" size="30" runat="server" width="30">
给你个完整的实例，自己去学习吧！
<% @ Page Language="C#" %>
<% @ Import Namespace="System.Web.Mail" %>
<Script Language="C#" Runat="Server">
public void Mail_Send(Object src,EventArgs e)
{
//创建MailMessage对象
MailMessage MyMsg = new MailMessage();
MyMsg.From = tbFrom.Text;
MyMsg.To = tbTo.Text;
MyMsg.Subject = tbSubject.Text;
MyMsg.Priority = (MailPriority)ddlPriority.SelectedIndex;
MyMsg.BodyFormat= (MailFormat)ddlBodyFormat.SelectedIndex;
MyMsg.Body = tbBody.Text;
//如果有附件则上传
HttpPostedFile hpfFile = AttachFile.PostedFile;
if(hpfFile.FileName!="")
{
//有附件，则上传到Temp目录中
//取得文件名(不含路径)
char[] de = {\\};
string[] AFilename = hpfFile.FileName.Split(de);
string strFilename = AFilename[AFilename.Length-1];
string strPath = Server.MapPath(".")+"\\Temp\\"+strFilename;
hpfFile.SaveAs(strPath);
//添加附件
MyMsg.Attachments.Add(new MailAttachment(strPath));
}
try
{
//发送
SmtpMail.Send(MyMsg);
lblShowMsg.Text ="发送成功";
tbTo.Text = "";
tbSubject.Text = "";
tbBody.Text = "";
ddlPriority.SelectedIndex = 1;
ddlBodyFormat.SelectedIndex = 0;
}
catch(Exception ee)
{
lblShowMsg.Text = "发送失败:"+ee.ToString();
}
}
</script>
<html>
<head>
<title></title>
</head>
<body>
<form Enctype="multipart/form-data" runat="server">
<b>演示发送邮件附件</b>
<table border=1>
<tr><td colspan="2"><b>功能强大的邮件发送</b></td></tr>
<tr><td colspan="2"><asp:Label id="lblShowMsg" ForeColor="red" runat="server" /></td></tr>
<tr><td>收件人：</td><td><asp:TextBox id="tbTo" runat="server" /></td></tr>
<tr><td>发件人：</td><td><asp:TextBox id="tbFrom" runat="server" /></td></tr>
<tr><td>邮件主题：</td><td><asp:TextBox id="tbSubject" runat="server" /></td></tr>
<tr>
<td>优先级： <asp:DropDownList id="ddlPriority" runat="server">
<asp:ListItem Value="High">高</asp:ListItem>
<asp:ListItem Value="Normal" Selected>普通</asp:ListItem>
<asp:ListItem Value="Low">低</asp:ListItem>
</asp:DropDownList>
</td>
<td>邮件格式：<asp:DropDownList id="ddlBodyFormat" runat="server">
<asp:ListItem Value="Text">文本格式</asp:ListItem>
<asp:ListItem Value="Html">HTML格式</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr><td colspan="2">邮件内容:</td></tr>
<tr><td colspan="2"><asp:TextBox TextMode="MultiLine" Rows="5" Columns="50" id="tbBody" runat="server" /></td></tr>
<tr><td>邮件附件：</td><td><input type="file" id="AttachFile" runat="server" /></td></tr>
<tr><td><asp:Button id="btnSend" Text="发送" OnClick="Mail_Send" runat="server" /></td></tr>
</table>
</form>
</body>
</html>
