form1.cs

收Email邮件收Email邮件收Email邮件

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.Net.Sockets;
using System.IO;

namespace EmailReceiver
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.TextBox textBox3;
		private System.Windows.Forms.TextBox textBox4;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private TcpClient Server;		
		private string SendString;
		private byte[] BufferString;
		private NetworkStream networkstream;
		private StreamReader streamreader;
		private System.Windows.Forms.RichTextBox richTextBox1;
		private System.Windows.Forms.Button button3;
		private System.Windows.Forms.Label label4;

		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.textBox3 = new System.Windows.Forms.TextBox();
			this.textBox4 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.richTextBox1 = new System.Windows.Forms.RichTextBox();
			this.button3 = new System.Windows.Forms.Button();
			this.label4 = new System.Windows.Forms.Label();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(16, 8);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(88, 16);
			this.label1.TabIndex = 0;
			this.label1.Text = "POP3 Server:";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(16, 40);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(72, 16);
			this.label2.TabIndex = 1;
			this.label2.Text = "User Name:";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(16, 72);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(72, 16);
			this.label3.TabIndex = 2;
			this.label3.Text = "Password:";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(96, 8);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(168, 21);
			this.textBox1.TabIndex = 3;
			this.textBox1.Text = "";
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(96, 40);
			this.textBox2.Name = "textBox2";
			this.textBox2.Size = new System.Drawing.Size(168, 21);
			this.textBox2.TabIndex = 4;
			this.textBox2.Text = "";
			// 
			// textBox3
			// 
			this.textBox3.Location = new System.Drawing.Point(96, 72);
			this.textBox3.Name = "textBox3";
			this.textBox3.PasswordChar = '*';
			this.textBox3.Size = new System.Drawing.Size(168, 21);
			this.textBox3.TabIndex = 5;
			this.textBox3.Text = "";
			// 
			// textBox4
			// 
			this.textBox4.Location = new System.Drawing.Point(136, 152);
			this.textBox4.Multiline = true;
			this.textBox4.Name = "textBox4";
			this.textBox4.Size = new System.Drawing.Size(64, 24);
			this.textBox4.TabIndex = 6;
			this.textBox4.Text = "";
			this.textBox4.WordWrap = false;
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(64, 112);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(72, 24);
			this.button1.TabIndex = 7;
			this.button1.Text = "Connect";
			this.button1.Click += new System.EventHandler(this.ConnectBtn_click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(176, 112);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(80, 24);
			this.button2.TabIndex = 8;
			this.button2.Text = "Disconnect";
			this.button2.Click += new System.EventHandler(this.DisconBtn_click);
			// 
			// richTextBox1
			// 
			this.richTextBox1.Location = new System.Drawing.Point(8, 184);
			this.richTextBox1.Name = "richTextBox1";
			this.richTextBox1.ScrollBars = System.Windows.Forms.RichTextBoxScrollBars.Vertical;
			this.richTextBox1.Size = new System.Drawing.Size(304, 168);
			this.richTextBox1.TabIndex = 11;
			this.richTextBox1.Text = "";
			// 
			// button3
			// 
			this.button3.Location = new System.Drawing.Point(216, 152);
			this.button3.Name = "button3";
			this.button3.Size = new System.Drawing.Size(56, 24);
			this.button3.TabIndex = 12;
			this.button3.Text = "Receive";
			this.button3.Click += new System.EventHandler(this.ReceiveBtn_click);
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(8, 152);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(112, 24);
			this.label4.TabIndex = 13;
			this.label4.Text = "Enter the number:";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(328, 366);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.label4,
																		  this.button3,
																		  this.richTextBox1,
																		  this.button2,
																		  this.button1,
																		  this.textBox4,
																		  this.textBox3,
																		  this.textBox2,
																		  this.textBox1,
																		  this.label3,
																		  this.label2,
																		  this.label1});
			this.Name = "Form1";
			this.Text = "EmailReceiver";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void ConnectBtn_click(object sender, System.EventArgs e)
		{
			Server=new TcpClient(textBox1.Text,110);
			networkstream= Server.GetStream();
			streamreader=new StreamReader(networkstream);
			try
			{
				SendString="USER "+textBox2.Text+"\r\n";
				BufferString=System.Text.Encoding.ASCII.GetBytes(SendString.ToCharArray());
				networkstream.Write(BufferString,0,BufferString.Length);
				richTextBox1.AppendText(streamreader.ReadLine()+"\r\n");

				SendString="PASS "+textBox3.Text+"\r\n";
				BufferString=System.Text.Encoding.ASCII.GetBytes(SendString.ToCharArray());
				networkstream.Write(BufferString,0,BufferString.Length);
				richTextBox1.AppendText(streamreader.ReadLine()+"\r\n");

				SendString="STAT"+"\r\n";
				BufferString=System.Text.Encoding.ASCII.GetBytes(SendString.ToCharArray());
				networkstream.Write(BufferString,0,BufferString.Length);
				richTextBox1.AppendText(streamreader.ReadLine()+"\r\n");

				SendString="LIST"+"\r\n";
				BufferString=System.Text.Encoding.ASCII.GetBytes(SendString.ToCharArray());
				networkstream.Write(BufferString,0,BufferString.Length);
				richTextBox1.AppendText(streamreader.ReadLine()+"\r\n");
			}
			catch(InvalidOperationException err)
			{MessageBox.Show(err.ToString());}
		}

		private void DisconBtn_click(object sender, System.EventArgs e)
		{
			try
			{
				SendString="QUIT\r\n";
				BufferString=System.Text.Encoding.ASCII.GetBytes(SendString.ToCharArray());
				networkstream.Write(BufferString,0,BufferString.Length);
				richTextBox1.AppendText(streamreader.ReadLine()+"\r\n");
				networkstream.Close();
				streamreader.Close();
			}
			catch{MessageBox.Show("The Connection has not exist!");}
			
		}
		
		private void ReceiveBtn_click(object sender, System.EventArgs e)
		{
			string TempString;
			TempString=" ";
			richTextBox1.Clear();
			SendString="RETR "+textBox4.Text+"\r\n";
			BufferString=System.Text.Encoding.ASCII.GetBytes(SendString.ToCharArray());
			networkstream.Write(BufferString,0,BufferString.Length);
			TempString=streamreader.ReadLine();
			if(TempString[0]!='-')
			{
				while(TempString!=".")
				{
					TempString=streamreader.ReadLine();
				}
				TempString=streamreader.ReadLine();
				while(TempString!=".")
				{
					richTextBox1.AppendText(TempString+"\r\n");
					TempString=streamreader.ReadLine();
				}
			}
			else
			{
				richTextBox1.AppendText("\r\n Error!\r\n");
			}
		}
	}
}