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  • ASP.NET 实现邮件发送和接受的功能（Mail）

    前台代码：html
    <%@ Page language="c#" Codebehind="WebMail.aspx.cs" AutoEventWireup="false" Inherits="MymailSys.WebMail" %>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
    <HTML>
            <HEAD>
                <title>WebForm1</title>
                <meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
                <meta content="C#" name="CODE_LANGUAGE">
                <meta content="JavaScript" name="vs_defaultClientScript">
                <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
            </HEAD>
            <body MS_POSITIONING="GridLayout">
                <form id="Form1" method="post" runat="server" enctype="multipart/form-data">
                    <FONT face="宋体">
                        <asp:label id="Label2" style="Z-INDEX: 101; LEFT: 224px; POSITION: absolute; TOP: 16px" runat="server" Width="292px" Font-Names="隶书" Font-Size="XX-Large">邮件发送系统</asp:label>
                        <TABLE id="Table1" style="Z-INDEX: 102; LEFT: 80px; WIDTH: 606px; POSITION: absolute; TOP: 96px; HEIGHT: 341px" cellSpacing="1" cellPadding="1" width="606" align="left" border="1">
                            <TR>
                                <TD style="WIDTH: 178px; HEIGHT: 21px" colSpan="2"><asp:label id="lblShowMsg" runat="server" Width="99px" ForeColor="Red"></asp:label></TD>
                                <TD style="WIDTH: 178px; HEIGHT: 21px"><FONT face="宋体"></FONT></TD>
                            </TR>
                            <TR>
                                <TD style="WIDTH: 122px"><asp:label id="Label1" runat="server" Width="92px">发件人：</asp:label></TD>
                                <TD><asp:textbox id="tbFrom" runat="server"></asp:textbox></TD>
                                <TD><asp:requiredfieldvalidator id="RequiredFieldValidator1" runat="server" Width="156px" ControlToValidate="tbFrom" ErrorMessage="发件人不能为空！" Height="26px"></asp:requiredfieldvalidator></TD>
                            </TR>
                            <TR>
                                <TD style="WIDTH: 122px"><FONT face="宋体">收件人：</FONT></TD>
                                <TD><asp:textbox id="tbTo" runat="server"></asp:textbox></TD>
                                <TD><FONT face="宋体"><asp:requiredfieldvalidator id="RequiredFieldValidator2" runat="server" Width="152px" ControlToValidate="tbTo" ErrorMessage="收件人不能为空！" Height="26px"></asp:requiredfieldvalidator></FONT></TD>
                            </TR>
                            <TR>
                                <TD style="WIDTH: 122px"><FONT face="宋体">邮件主题：</FONT></TD>
                                <TD><asp:textbox id="tbSubject" runat="server"></asp:textbox></TD>
                                <TD><asp:requiredfieldvalidator id="RequiredFieldValidator3" runat="server" Width="160px" ControlToValidate="tbSubject" ErrorMessage="邮件主题不能为空！" Height="26px"></asp:requiredfieldvalidator></TD>
                            </TR>
                            <TR>
                                <TD style="WIDTH: 122px">邮件服务器:</TD>
                                <TD><asp:textbox id="tbServer" runat="server"></asp:textbox></TD>
                                <TD></TD>
                            </TR>
                            <TR>
                                <TD style="WIDTH: 122px">邮件用户名称:</TD>
                                <TD><asp:textbox id="tbUserName" runat="server"></asp:textbox></TD>
                                <TD><asp:requiredfieldvalidator id="RequiredFieldValidator5" runat="server" ControlToValidate="tbUserName" ErrorMessage="用户名不能为空!"></asp:requiredfieldvalidator></TD>
                            </TR>
                            <TR>
                                <TD style="WIDTH: 122px">密码:</TD>
                                <TD><asp:textbox id="tbPass" runat="server" TextMode="Password"></asp:textbox></TD>
                                <TD><asp:requiredfieldvalidator id="RequiredFieldValidator6" runat="server" ControlToValidate="tbPass" ErrorMessage="密码不能为空!"></asp:requiredfieldvalidator></TD>
                            </TR>
                            <TR>
                                <TD style="WIDTH: 122px"><FONT face="宋体">优先级:
                                        <asp:dropdownlist id="ddlp" runat="server">
                                            <asp:ListItem Value="高">高</asp:ListItem>
                                            <asp:ListItem Value="低">低</asp:ListItem>
                                            <asp:ListItem Value="普通">普通</asp:ListItem>
                                        </asp:dropdownlist></FONT></TD>
                                <TD><FONT face="宋体">邮件格式：
                                        <asp:dropdownlist id="ddlB" runat="server">
                                            <asp:ListItem Value="Text">Text</asp:ListItem>
                                            <asp:ListItem Value="Html">Html</asp:ListItem>
                                        </asp:dropdownlist></FONT></TD>
                                <TD></TD>
                            </TR>
                            <TR>
                                <TD style="WIDTH: 122px">邮件附件：</TD>
                                <TD colSpan="2"><INPUT id="FileSelect" style="WIDTH: 282px; HEIGHT: 22px" type="file" size="27" name="File1" runat="server"></TD>
                            </TR>
                            <TR>
                                <TD style="WIDTH: 178px" colSpan="3"><FONT face="宋体">邮件内容：</FONT></TD>
                            </TR>
                            <TR>
                                <TD style="WIDTH: 178px" colSpan="3"><FONT face="宋体"><asp:textbox id="tbBody" runat="server" Width="594px" Height="167px" TextMode="MultiLine"></asp:textbox></FONT></TD>
                            </TR>
                            <TR>
                                <TD style="WIDTH: 235px" colSpan="3"><asp:button id="btnSubmit" runat="server" Text="发送"></asp:button><FONT face="宋体"></FONT></TD>
                            </TR>
                        </TABLE>
                </form>
                </FONT>
            </body>
    </HTML>

    后台代码：cs
    using System;
    using System.Collections;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Web;
    using System.Web.SessionState;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Web.UI.HtmlControls;
    using System.Web.Mail;
    namespace MymailSys
    {
            /// <summary>
            /// WebForm1 的摘要说明。
            /// </summary>
        public class WebMail : System.Web.UI.Page
            {
                protected System.Web.UI.WebControls.TextBox tbBody;
                protected System.Web.UI.WebControls.DropDownList ddlB;
                protected System.Web.UI.WebControls.DropDownList ddlp;
                protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator3;
                protected System.Web.UI.WebControls.TextBox tbSubject;
                protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator2;
                protected System.Web.UI.WebControls.TextBox tbTo;
                protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
                protected System.Web.UI.WebControls.TextBox tbFrom;
                protected System.Web.UI.WebControls.Label Label1;
                protected System.Web.UI.WebControls.Label lblShowMsg;
                protected System.Web.UI.WebControls.Label Label2;
                protected System.Web.UI.HtmlControls.HtmlForm Form1;
                protected System.Web.UI.WebControls.TextBox tbServer;
                protected System.Web.UI.WebControls.TextBox tbUserName;
                protected System.Web.UI.WebControls.TextBox tbPass;
                protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator5;
                protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator6;
                protected System.Web.UI.WebControls.Button btnSubmit;
                protected System.Web.UI.HtmlControls.HtmlInputFile FileSelect;
                protected System.Web.UI.HtmlControls.HtmlForm Form2;
        
                private void Page_Load(object sender, System.EventArgs e)
                {
                    // 在此处放置用户代码以初始化页面
            }

                Web 窗体设计器生成的代码

                private void btnSubmit_Click(object sender, System.EventArgs e)
                {
                    //SmtpMail.Send("shaozhd@263.net","shaozhd@263.net","Test","Hello");
                MailMessage m = new MailMessage();
                m.From     = tbFrom.Text;
                m.To     = tbTo.Text;
                m.Subject     = tbSubject.Text;
                m.Body     = tbBody.Text;
                    //优先级
                switch(ddlp.SelectedIndex)
                    {
                        case 0:
                        m.Priority     = MailPriority.High;
                            break;
                        case 1:
                        m.Priority     = MailPriority.Low;
                            break;
                        default:
                        m.Priority     = MailPriority.Normal;
                            break;
                }
                    //格式
                if(ddlp.SelectedIndex==0)
                    m.BodyFormat     = MailFormat.Text;
                    else
                    m.BodyFormat     = MailFormat.Html;
                    //以下设置服务器
                if(tbServer.Text!="")
                    {
                    SmtpMail.SmtpServer     = tbServer.Text;
                        //以下代码适用于Framework1.1以上版本。
    //                m.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate",
    //                    "1");    //basic authentication
    //                m.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername",
    //                    tbUserName.Text); //set your username here
    //                m.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword",
    //                    tbPass.Text);    //set your password here
                }
                    //以下处理附件 
                string strFileName = FileSelect.PostedFile.FileName;
                    if(strFileName!="")
                    m.Attachments.Add(    new MailAttachment(strFileName));
                SmtpMail.Send(m);
            }
        }
    }
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  • 原文地址：https://www.cnblogs.com/ghd258/p/259692.html
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