邮件发送类，支持HTML格式，支持优先级设置

邮件发送类，支持HTML格式，支持优先级设置。通过SOCKET类实现的
using System;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;

namespace Blood.Com.ClassLib
{
/// <summary>
/// TcpClient派生类，用来进行SMTP服务器的连接工作
/// </summary>
public class SMTPClient : TcpClient
{
public bool isConnected()
{
return Active;
}

public void SendCommandToServer(string Command)
{
NetworkStream ns = this.GetStream() ;
byte[] WriteBuffer ;
WriteBuffer = new byte[1024] ;
WriteBuffer = Encoding.Default.GetBytes(Command) ;
ns.Write(WriteBuffer,0,WriteBuffer.Length);
return ;
}
public string GetServerResponse()
{
int StreamSize ;
string ReturnValue = "" ;
byte[] ReadBuffer ;
NetworkStream ns = this.GetStream() ;
ReadBuffer = new byte[1024] ;
StreamSize = ns.Read(ReadBuffer,0,ReadBuffer.Length);
if (StreamSize==0)
{
return ReturnValue ;
}
else
{
ReturnValue = Encoding.Default.GetString(ReadBuffer);
return ReturnValue;
}
}

public bool DoesStringContainSMTPCode(string s,string SMTPCode)
{
return(s.IndexOf(SMTPCode,0,10)==-1)?false:true;
}

} //结束类

/// <summary>
/// 发送邮件类
/// </summary>
public class SMTPMail
{
/// <summary>
/// 错误反馈信息
/// </summary>
private string strErrMessage = null;

/// <summary>
/// SMTP服务器反馈的信息
/// </summary>
private string strResponse;

/// <summary>
/// 构造函数
/// </summary>
public SMTPMail()
{
strErrMessage = "";
strResponse = "";
}

/// <summary>
/// 取得错误反馈信息
/// </summary>
public string ErrorMessage
{
get
{
return strErrMessage ;
}
}

/// <summary>
/// 取得SMTP服务器反馈的信息
/// </summary>
public string ServerResponse
{
get
{
return strResponse;
}
}

/// <summary>
/// 邮件发送优先级
/// </summary>
public enum Prioritys
{
/// <summary>
/// 最高级别
/// </summary>
HIGH = 1,
/// <summary>
/// 默认级别
/// </summary>
NORMAL = 3,
/// <summary>
/// 最低级别
/// </summary>
LOW = 5
}

public void SendMail(string SmtpHost,int Port,string From,string DisplayFromName,string To,string DisplayToName,Prioritys Priority,bool Html,string Base,string Subject,string Message)
{
try
{
string strResponseNumber;
SMTPClient smtpcMail = new SMTPClient();
smtpcMail.Connect(SmtpHost,Port);
bool bolConnect = smtpcMail.isConnected();

//判断是否进行了连接
if (!bolConnect)
{
strErrMessage = "Smtp服务器连接失败...";
return;
}

//读取反馈信息
strResponseNumber = smtpcMail.GetServerResponse();
if (smtpcMail.DoesStringContainSMTPCode(strResponseNumber,"220"))
{
this.strResponse += strResponseNumber;
}
else
{
this.strErrMessage = "连接失败" + strResponseNumber;
return ;
}

string[] strSendBuffer = new string[6];
string[] strResponseCode = {"220","250","251","354","221"}; // success codes from SMTP server

string strData = "";
strData = string.Concat("HELO ",SmtpHost);
strData = string.Concat(strData,"/r/n");
strSendBuffer[0] = strData ;

strData = "";
strData = string.Concat("MAIL FROM: ","<" + From + ">");
strData = string.Concat(strData,"/r/n");
strSendBuffer[1] = strData;

strData = "";
strData = string.Concat("RCPT TO: ","<" + To + ">");
strData = string.Concat(strData,"/r/n");
strSendBuffer[2] = strData;

strData = "" ;
strData = string.Concat("DATA","/r/n");
strSendBuffer[3] = strData ;

strData = "" ;
strData = string.Concat("From: ",DisplayFromName + "<" + From + ">");
strData = string.Concat(strData,"/r/n" );
strData = string.Concat(strData,"To: " );
strData = string.Concat(strData,DisplayToName + "<" + To + ">");
strData = string.Concat(strData,"/r/n" );
strData = string.Concat(strData,"Subject: " );
strData = string.Concat(strData,Subject);
strData = string.Concat(strData,"/r/n");
strData = string.Concat(strData,"MIME-Version: 1.0" );
strData = string.Concat(strData,"/r/n");
strData = string.Concat(strData,"X-Priority: " + Priority);
strData = string.Concat(strData,"/r/n");
strData = string.Concat(strData,"X-MSMail-Priority: " + Priority);
strData = string.Concat(strData,"/r/n");
if(Html == true)
{
strData = string.Concat(strData,"Content-Type: text/html;" );
}
else
{
strData = string.Concat(strData,"Content-Type: text/plain;" );
}
strData = string.Concat(strData,"/r/n");
strData = string.Concat(strData,"charset=/"iso-8859-1/"" );
strData = string.Concat(strData,"/r/n");
if(Html == true)
{
strData = string.Concat(strData,"Content-Transfer-Encoding: text/html;" );
}
else
{
strData = string.Concat(strData,"Content-Transfer-Encoding: text/plain;" );
}
strData = string.Concat(strData,"/r/n");
strData = string.Concat(strData,"Content-Base: /"" + Base + "/"" );
strData = string.Concat(strData,"/r/n" + "/r/n");

strData = string.Concat(strData,Message);
strData = string.Concat(strData,"/r/n./r/n");
strSendBuffer[4] = strData;

strData = "" ;
strData = string.Concat(strData,"QUIT/r/n");
strSendBuffer[5] = strData;

int i = 0 ;

while(i < strSendBuffer.Length)
{
smtpcMail.SendCommandToServer(strSendBuffer[i]);
strResponseNumber = smtpcMail.GetServerResponse();

for(int j=0;j<strResponseCode.Length;j++)
{
if (smtpcMail.DoesStringContainSMTPCode(strResponseNumber,strResponseCode[j]))
{
this.strResponse += strResponseNumber;
this.strResponse += "<br>";
break;
}
else
{
if(j==strResponseCode.Length-1)
{
this.strErrMessage += strResponseNumber;
this.strErrMessage += strSendBuffer[i];
return;
}
}
}

i++ ;
} // 结束循环
}
catch(SocketException err)
{
this.strErrMessage += err.Message + " " + err.StackTrace;
}
catch(Exception e)
{
this.strErrMessage += e.Message + " " + e.StackTrace;
}
} //结束邮件发送方法

} // 结束类

} // 结束Namespace

邮件发送前台页面

<%@ Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false" Inherits="Test.SendMailSample" %>
<HTML>
<HEAD>
<title>邮件发送例子</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style type="text/css">TD {
FONT-SIZE: 9pt; FONT-FAMILY: "宋体"
}
.TextBox {
BORDER-RIGHT: #000000 thin dashed; BORDER-TOP: #000000 thin dashed; BORDER-LEFT: #000000 thin dashed; BORDER-BOTTOM: #000000 thin dashed
}
</style>
</HEAD>
<body text="#000000" bgColor="#ffffff">
<form runat="server">
<table style="BORDER-COLLAPSE: collapse" borderColor="#111111" cellSpacing="0" cellPadding="3" width="500" align="center" border="1">
<tr>
<td align="middle" colSpan="2">邮件发送例子（SOCKET类）</td>
</tr>
<asp:panel id="pelMessage" Visible="False" Runat="server">
<TR>
<TD align="middle" colSpan="2">
<asp:Label id="lblMessage" runat="server"></asp:Label></TD>
</TR>
</asp:panel>
<tr>
<td align="right" width="150">SMTP服务器：</td>
<td width="350"><asp:textbox id="txtSmtpHost" runat="server" CssClass="TextBox" MaxLength="50"></asp:textbox><asp:requiredfieldvalidator id="rfvSmtpHost" runat="server" ErrorMessage="*" ControlToValidate="txtSmtpHost" Display="Dynamic"></asp:requiredfieldvalidator></td>
</tr>
<tr>
<td align="right" width="150">SMTP服务器端口：</td>
<td width="350"><asp:textbox id="txtPort" runat="server" CssClass="TextBox" MaxLength="6"></asp:textbox><asp:requiredfieldvalidator id="rfvPort" runat="server" ErrorMessage="*" ControlToValidate="txtPort" Display="Dynamic"></asp:requiredfieldvalidator><asp:regularexpressionvalidator id="revPort" runat="server" ErrorMessage="只能输入数字" ValidationExpression="/d{1,}" ControlToValidate="txtPort" Display="Dynamic"></asp:regularexpressionvalidator></td>
</tr>
<tr>
<td align="right" width="150">邮件发送者：</td>
<td width="350"><asp:textbox id="txtFrom" runat="server" CssClass="TextBox" MaxLength="50"></asp:textbox><asp:requiredfieldvalidator id="rfvFrom" runat="server" ErrorMessage="*" ControlToValidate="txtFrom" Display="Dynamic"></asp:requiredfieldvalidator>
<asp:regularexpressionvalidator id="revFrom" runat="server" ErrorMessage="邮件格式错误" ValidationExpression="/w+([-+.]/w+)*@/w+([-.]/w+)*/./w+([-.]/w+)*" ControlToValidate="txtFrom" Display="Dynamic"></asp:regularexpressionvalidator></td>
</tr>
<tr>
<td align="right" width="150">发送者显示名称：</td>
<td width="350"><asp:textbox id="txtFromName" runat="server" CssClass="TextBox" MaxLength="20"></asp:textbox></td>
</tr>
<tr>
<td align="right" width="150">邮件接收者：</td>
<td width="350"><asp:textbox id="txtTo" runat="server" CssClass="TextBox" MaxLength="50"></asp:textbox><asp:requiredfieldvalidator id="rfvTo" runat="server" ErrorMessage="*" ControlToValidate="txtTo" Display="Dynamic"></asp:requiredfieldvalidator>
<asp:regularexpressionvalidator id="revTo" runat="server" ErrorMessage="邮件格式错误" ValidationExpression="/w+([-+.]/w+)*@/w+([-.]/w+)*/./w+([-.]/w+)*" ControlToValidate="txtTo" Display="Dynamic"></asp:regularexpressionvalidator></td>
</tr>
<tr>
<td align="right" width="150">接收者显示名称：</td>
<td width="350"><asp:textbox id="txtToName" runat="server" CssClass="TextBox" MaxLength="20"></asp:textbox></td>
</tr>
<tr>
<td align="right" width="150">邮件发送优先级：</td>
<td width="350"><asp:dropdownlist id="ddlPriority" runat="server">
<asp:ListItem Value="高">高</asp:ListItem>
<asp:ListItem Value="默认" Selected="True">默认</asp:ListItem>
<asp:ListItem Value="低">低</asp:ListItem>
</asp:dropdownlist></td>
</tr>
<tr>
<td align="right" width="150">发送HTML格式的邮件：</td>
<td width="350"><asp:dropdownlist id="ddlHtml" runat="server">
<asp:ListItem Value="是" Selected="True">是</asp:ListItem>
<asp:ListItem Value="否">否</asp:ListItem>
</asp:dropdownlist></td>
</tr>
<tr>
<td align="right" width="150">邮件主题：</td>
<td width="350"><asp:textbox id="txtSubject" runat="server" CssClass="TextBox" MaxLength="50"></asp:textbox>
<asp:RequiredFieldValidator id="rfvSubject" runat="server" ErrorMessage="*" ControlToValidate="txtSubject" Display="Dynamic"></asp:RequiredFieldValidator></td>
</tr>
<tr>
<td align="right" width="150">邮件内容：</td>
<td width="350">
<asp:textbox id="txtMessage" runat="server" Rows="15" TextMode="MultiLine" CssClass="TextBox" Columns="40"></asp:textbox>
<asp:RequiredFieldValidator id="rfvMessage" runat="server" ErrorMessage="*" ControlToValidate="txtMessage" Display="Dynamic"></asp:RequiredFieldValidator>
</td>
</tr>
<tr align="middle">
<td colSpan="2">
<asp:Button id="btnSendMail" runat="server" Text="发送邮件" CssClass="TextBox" BackColor="Silver" ForeColor="Blue"></asp:Button>
</td>
</tr>
</table>
</form>
</body>
</HTML>

邮件发送Codebehind

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Blood.Com.ClassLib;

namespace Test
{
/// <summary>
/// 邮件发送例子
/// </summary>
public class SendMailSample : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid DataGrid1;
protected System.Web.UI.WebControls.DropDownList ddlPriority;
protected System.Web.UI.WebControls.DropDownList ddlHtml;
protected System.Web.UI.WebControls.TextBox txtSmtpHost;
protected System.Web.UI.WebControls.TextBox txtPort;
protected System.Web.UI.WebControls.TextBox txtFrom;
protected System.Web.UI.WebControls.TextBox txtFromName;
protected System.Web.UI.WebControls.TextBox txtTo;
protected System.Web.UI.WebControls.TextBox txtToName;
protected System.Web.UI.WebControls.TextBox txtSubject;
protected System.Web.UI.WebControls.TextBox txtMessage;
protected System.Web.UI.WebControls.RegularExpressionValidator revPort;
protected System.Web.UI.WebControls.RequiredFieldValidator rfvSmtpHost;
protected System.Web.UI.WebControls.RequiredFieldValidator rfvPort;
protected System.Web.UI.WebControls.RequiredFieldValidator rfvFrom;
protected System.Web.UI.WebControls.RequiredFieldValidator rfvTo;
protected System.Web.UI.WebControls.RequiredFieldValidator rfvSubject;
protected System.Web.UI.WebControls.RequiredFieldValidator rfvMessage;
protected System.Web.UI.WebControls.Button btnSendMail;
protected System.Web.UI.WebControls.Label lblMessage;
protected System.Web.UI.WebControls.RegularExpressionValidator revFrom;
protected System.Web.UI.WebControls.RegularExpressionValidator revTo;
protected System.Web.UI.WebControls.Panel pelMessage;

private void Page_Load(object sender, System.EventArgs e)
{
}

#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.btnSendMail.Click += new System.EventHandler(this.btnSendMail_Click);
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

private void btnSendMail_Click(object sender, System.EventArgs e)
{
if(IsPostBack)
{
SMTPMail clsMail = new SMTPMail();
string strSmtpHost = txtSmtpHost.Text;
int intPort = Int32.Parse(txtPort.Text);
string strFrom = txtFrom.Text;
string strFromName = txtFromName.Text;
string strTo = txtTo.Text;
string strToName = txtToName.Text;
SMTPMail.Prioritys Priority = SMTPMail.Prioritys.NORMAL;
bool bolHtml;
string strSubject = txtSubject.Text;
string strMessage = txtMessage.Text;
if(ddlPriority.SelectedItem.Text == "默认")
{
Priority = SMTPMail.Prioritys.NORMAL;
}
else if(ddlPriority.SelectedItem.Text == "高")
{
Priority = SMTPMail.Prioritys.HIGH;
}
else if(ddlPriority.SelectedItem.Text == "低")
{
Priority = SMTPMail.Prioritys.LOW;
}
if(ddlHtml.SelectedItem.Text == "是")
{
bolHtml = true;
}
else
{
bolHtml = false;
}
clsMail.SendMail(strSmtpHost,intPort,strFrom,strFromName,strTo,strToName,Priority,bolHtml,"",strSubject,strMessage);
if(clsMail.ErrorMessage !="")
{
pelMessage.Visible = true;
lblMessage.Text = clsMail.ErrorMessage;
lblMessage.ForeColor = System.Drawing.Color.Red;
}
else
{
pelMessage.Visible = true;
lblMessage.Text = "邮件发送成功";
lblMessage.ForeColor = System.Drawing.Color.Blue;
}
}
}
}
}