if (recipient==null)
{
throw (new argumentexception("收件人不能为空."));
}
else
{
for (int i=0;i<recipient.length;i++)
{
addrecipients(recipient[i]);
}
}
}
public mailformat bodyformat
{
set { _bodyformat=value;}
get { return _bodyformat;}
}
private string _from;//发件人地址
private string _fromname;//发件人姓名
private ilist _recipients;//收件人
private mailattachments _attachments;//附件
private string _body;//内容
private string _subject;//主题
private mailformat _bodyformat;//邮件格式
private string _charset="gb2312";//字符编码格式
private mailpriority _priority;//邮件优先级
}
#endregion
#region class smtpmail
public class smtpserverhelper
{
private string crlf="\r\n";//回车换行
/// <summary>
/// 错误消息反馈
/// </summary>
private string errmsg;
/// <summary>
/// tcpclient对象，用于连接服务器
/// </summary>
private tcpclient tcpclient;
/// <summary>
/// networkstream对象
/// </summary>
private networkstream networkstream;
/// <summary>
/// 服务器交互记录
/// </summary>
private string logs="";
/// <summary>
/// smtp错误代码哈希表
/// </summary>
private hashtable errcodeht = new hashtable();
/// <summary>
/// smtp正确代码哈希表
/// </summary>
private hashtable rightcodeht = new hashtable();
public smtpserverhelper()
{
smtpcodeadd();//初始化smtpcode
}
~smtpserverhelper()
{
networkstream.close();
tcpclient.close();
}
/// <summary>
/// 将字符串编码为base64字符串
/// </summary>
/// <param name="str">要编码的字符串</param>
private string base64encode(string str)
{
byte[] barray;
barray=encoding.default.getbytes(str);
return convert.tobase64string(barray);
}
/// <summary>
/// 将base64字符串解码为普通字符串
/// </summary>
/// <param name="str">要解码的字符串</param>
private string base64decode(string str)
{
byte[] barray;
barray=convert.frombase64string(str);
return encoding.default.getstring(barray);
}
/// <summary>
/// 得到上传附件的文件流
/// </summary>
/// <param name="filepath">附件的绝对路径</param>
private string getstream(string filepath)
{
//建立文件流对象
system.io.filestream filestr=new system.io.filestream(filepath,system.io.filemode.open);
byte[] by=new byte[system.convert.toint32(filestr.length)];
filestr.read(by,0,by.length);
filestr.close();
return(system.convert.tobase64string(by));
}
/// <summary>
/// smtp回应代码哈希表
/// </summary>
private void smtpcodeadd()
{
//[rfc 821 4.2.1.]
/*
4.2.2. numeric order list of reply codes
211 system status, or system help reply
214 help message
[information on how to use the receiver or the meaning of a
particular non-standard command; this reply is useful only
to the human user]
220 <domain> service ready
221 <domain> service closing transmission channel
250 requested mail action okay, completed
251 user not local; will forward to <forward-path>
