ASP.NET读取POP3邮件的操作

namespace pop3client { using system.io ; using system.net; using system.net.sockets ; //please note that all code is copyright 2002 by william j dean   public class pop3client { public enum connect_state {disc,authorization,transaction,update}; public string user; public string pwd; public string pop; public bool error; public connect_state state=connect_state.disc ; //borrowed from agus kurniawan's article:"retrieve mail from a pop3 server using c#" at http://www.codeproject.com/csharp/popapp.asp     private tcpclient server; private networkstream netstrm; private streamreader rdstrm; private string data; private byte[] szdata; private string crlf = " "; public pop3client() { //nothing to do..just create to object     } public pop3client(string pop_server,string user_name,string password) { //put the specied server (pop_server), user (user_name) and password (password) //into the appropriate properties.       pop=pop_server; user=user_name; pwd=password; } #region utility methods, some public, some private public string connect (string pop_server) { pop=pop_server;  //put the specified server into the pop property       return(connect()); //call the connect method     } public string connect() { //initialize to the pop server. this code snipped "borrowed" //with some modifications... //from the article "retrieve mail from a pop3 server using c#" at //www.codeproject.com by agus kurniawan //http://www.codeproject.com/csharp/popapp.asp // create server with port 110       server = new tcpclient(pop,110); try { // initialization         netstrm = server.getstream(); rdstrm= new streamreader(server.getstream()); //the pop session is now in the authorization state         state=connect_state.authorization ; return(rdstrm.readline ()); } catch(invalidoperationexception err) { return("error: "+err.tostring()); } } private string disconnect () { string temp="disconnected successfully."; if(state !=connect_state.disc) { //close connection         netstrm.close(); rdstrm.close(); state=connect_state.disc ; } else { temp="not connected."; } return(temp); } private void issue_command(string command) { //send the command to the pop server. this code snipped "borrowed" //with some modifications... //from the article "retrieve mail from a pop3 server using c#" at //www.codeproject.com by agus kurniawan //http://www.codeproject.com/csharp/popapp.asp       data= command + crlf; szdata = system.text.encoding.ascii.getbytes(data.tochararray()); netstrm.write(szdata,0,szdata.length); } private string read_single_line_response() { //read the response of the pop server. this code snipped "borrowed" //with some modifications... //from the article "retrieve mail from a pop3 server using c#" at //www.codeproject.com by agus kurniawan //http://www.codeproject.com/csharp/popapp.asp       string temp; try { temp = rdstrm.readline(); was_pop_error(temp); return(temp); } catch(invalidoperationexception err) { return("error in read_single_line_response(): " + err.tostring ()) ; } } private string read_multi_line_response() { //read the response of the pop server. this code snipped "borrowed" //with some modifications... //from the article "retrieve mail from a pop3 server using c#" at //www.codeproject.com by agus kurniawan //http://www.codeproject.com/csharp/popapp.asp       string temp=""; string sztemp; try { sztemp = rdstrm.readline(); was_pop_error(sztemp); if(!error) { while(sztemp!=".") { temp += sztemp+crlf; sztemp = rdstrm.readline(); } } else { temp=sztemp; } return(temp); } catch(invalidoperationexception err) { return("error in read_multi_line_response(): " + err.tostring ()); } } private void was_pop_error(string response) { //detect if the pop server that issued the response believes that //an error has occured. if(response.startswith ("-")) { //if the first character of the response is "-" then the //pop server has encountered an error executing the last //command send by the client         error=true; } else { //success         error=false; } } #endregion #region pop commands

 

 

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Tag: 邮件

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