| EMAIL发送系统(C#+基于SMTP认证)[转] |
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| EMAIL发送系统(C#+基于SMTP认证)[转] |
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作者：佚名 文章来源：不详 点击数： 更新时间：2006-12-6 1:06:56  |
barray;
barray=Encoding.Default.GetBytes(str);
return Convert.ToBase64String(barray);
}
///
/// 将Base64字符串解码为普通字符串
///
/// 要解码的字符串
private string Base64Decode(string str)
{
byte[] barray;
barray=Convert.FromBase64String(str);
return Encoding.Default.GetString(barray);
}
///
/// 得到上传附件的文件流
///
/// 附件的绝对路径
private string GetStream(string filePath)
{
byte[] by = null;
System.IO.FileStream FileStr = null;
string streamString = "";
try
{
//建立文件流对象
FileStr=new System.IO.FileStream(filePath,System.IO.FileMode.Open);
by=new byte[System.Convert.ToInt32(FileStr.Length)];
FileStr.Read(by,0,by.Length);
streamString = System.Convert.ToBase64String(by);
}
catch(Exception ex)
{
//写错误日志
m_logs.Append("错误："+ex.Message+ENTER);
}
finally
{
if(FileStr != null)
{
FileStr.Close();
}
}
return streamString;
}
///
/// 发送SMTP命令
///
private bool SendCommand(string str,NetworkStream _NetworkStreamObject)
{
byte[] WriteBuffer;
if(str==null||str.Trim()==String.Empty)
{
return true;
}
m_logs.Append(str+ENTER);
WriteBuffer = Encoding.Default.GetBytes(str);
try
{
_NetworkStreamObject.Write(WriteBuffer,0,WriteBuffer.Length);
}
catch(Exception ex)
{
//写日志
m_logs.Append("错误："+ex.Message+ENTER);
return false;
}
return true;
}
///
/// 接收SMTP服务器回应
///
private string RecvResponse(NetworkStream _NetworkStreamObject)
{
int StreamSize = 0;
string ReturnValue = String.Empty;
byte[] ReadBuffer = new byte[1024] ;
try
{
StreamSize = _NetworkStreamObject.Read(ReadBuffer,0,ReadBuffer.Length);
}
catch(Exception ex)
{
//写日志
m_logs.Append("错误："+ex.Message+ENTER);
m_ErrCode = ex.Message;
return "false";
}
if (StreamSize==0)
{
return ReturnValue ;
}
else
{
ReturnValue = Encoding.Default.GetString(ReadBuffer).Substring(0,StreamSize);
m_logs.Append(ReturnValue+ENTER);
return ReturnValue;
}
}
///
/// 与服务器交互，发送一条命令并接收回应。
///
/// 一个要发送的命令
private bool Dialog(string str,NetworkStream _NetworkStream)
{
if(str==null||str.Trim()=="")
{
return true;
}
if(SendCommand(str,_NetworkStream))
{
string RR=RecvResponse(_NetworkStream);
if(RR=="false")
{
return false;
}
string RRCode=RR.Substring(0,3);
if(m_RightCodeHT[RRCode]!=null)
{
return true;
}
else
{
m_ErrCode = RRCode;
return false;
}
}
else
{
return false;
}
}
///
/// 与服务器交互，发送一组命令并接收回应。
///
private bool Dialog(string[] str,NetworkStream _NetworkStream)
{
for(int i=0;i {
if(!Dialog(str[i],_NetworkStream))
{
return false;
}
}
return true;
}
///
/// SendEmail
///
///
private bool SendEmail(NetworkStream _NetworkStream,bool needSmtp,string mailServer,string userName,string password,Hashtable recipients,string from,
string fromName,string recipientName,string subject,string priority,IList attachments,bool isHtml,
string body)
{
//验证网络连接是否正确
if(m_RightCodeHT[RecvResponse(_NetworkStream).Substring(0,3)]==null)
{
return false;
}
string[] SendBuffer;
string SendBufferstr;
StringBuilder SendBufferstrBuilder = new StringBuilder();
//进行SMTP验证
if(needSmtp)
{
SendBuffer=new String[4];
SendBuffer[0]="EHLO " + mailServer + ENTER;
SendBuffer[1]="AUTH LOGIN" + ENTER;
SendBuffer[2]=Base64Encode(userName) + ENTER;
SendBuffer[3]=Base64Encode(password) + ENTER;
if(!Dialog(SendBuffer,_NetworkStream))
{
return false;
}
}
else
{
SendBufferstr="HELO " + mailServer + ENTER;
if(!Dialog(SendBufferstr,_NetworkStream))
return false;
}
//
SendBufferstr="MAIL FROM:<" + from + ">" + ENTER;
if(!Dialog(SendBufferstr,_NetworkStream))
return false;
//
SendBuffer=new string[m_recipientMaxnum];
for(int i=0;i {
SendBuffer[i]="RCPT TO:<" + recipients[i].ToString() +">" + ENTER;
}
if(!Dialog(SendBuffer,_NetworkStream))上一页 [1] [2] [3] [4] [5] 下一页
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