上一篇我们简单的分析了微信平台的实现原理，由于博主的表达比较欠缺，说的比较简单，可能看得不是很明白，不过随着一步步进行或者查看源码，大家就会清楚的明白了。
好了，不废话，这一篇我们先来实现客户端。
客户端的灵魂是基于socket实现即时通讯，消息的收发都要通过它。
为了看起累直观明了，我们为这个客户端包装一下，也就是加个界面，让它看起来更像一个客户端。
本文用的是wpf来做的界面，当然也可以以用winform窗体，看个人了。
本客户端主要有以下几个界面：
文件结构如下：
1.登录/注册页面，为了简单，点击登陆就获取对应的账号密码登录，点击注册用的也是同样的输入框。
2.登陆后的界面，底部有三个导航按钮，默认显示的是会话历史记录页面
3.联系人页面
4.“发现”页面，用于搜索公众号或者用户的界面
下面主要来看一下客户端核心代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows;
namespace wechat
{
class Client
{
private static Interface_client client;
private static int port = 8885;
private static string serverIP = "127.0.0.1";
private static Socket clientSocket;
private static byte[] recResult = new byte[1024];
private static Thread mainthread,recivethread;
private static bool connected = false;
public Client(int port, string serverIP, Interface_client client)
{
Client.port = port;
Client.serverIP = serverIP;
Client.client = client;
}
public Client( Interface_client client)
{
Client.client = client;
}
public void Start()
{
mainthread = new Thread(start);
mainthread.IsBackground = true;
mainthread.Start();
}
public void Stop()
{
mainthread.Abort();
}
public void Send(string content)
{
try { clientSocket.Send(Encoding.UTF8.GetBytes(content)); }
catch { }
}
private void start()
{
//GetIPAndPort();
IPAddress ip = IPAddress.Parse(serverIP);
clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
////是客户端，同时也是服务器
//clientSocket.Bind(new IPEndPoint(ip, port));
//clientSocket.Listen(20);
ConnectToServer(ip,client);
}
/*
*
* 从输入获取ip和端口号
* */
private static void GetIPAndPort()
{
Console.WriteLine("enter the IPAddress ,default is :{0}", serverIP);
GetAndCheckIpAddress();//判断输入的字符串是否为ip
Console.WriteLine("enter the PORT ,default is :{0}", port);
string tempPORT = Console.ReadLine();
if (tempPORT.Length > 0)
port = Convert.ToInt32(tempPORT);
}
//接入服务器
private static void ConnectToServer(IPAddress ip, Interface_client client)
{
try
{
clientSocket.Connect(new IPEndPoint(ip, port));
Console.WriteLine("connect to the server successful！");
connected = true;
clientSocket.Send(Encoding.UTF8.GetBytes("newconnection|"+Model.username));
//开启消息和接收消息的线程
//client.getMessage(clientSocket);
recivethread = new Thread(RecMessage);
recivethread.IsBackground = true;
recivethread.Start(client);
}
catch (Exception e)
{
connected = false;
MessageBox.Show("与连接失败......");
Console.WriteLine(e.Message);
//GetIPAndPort();
Thread.Sleep(30000);
MessageBox.Show("正在尝试重新连接......");
ConnectToServer(ip,client);
}
}
private static void SendMessage()
{
while (true)
try { clientSocket.Send(Encoding.UTF8.GetBytes(Console.ReadLine())); }
catch { }
}
private static void RecMessage(Object o)
{
Interface_client client = o as Interface_client;
while (true)
{
try
{
client.getMessage(clientSocket);
//int recLength = clientSocket.Receive(recResult);
//getMessage(Encoding.UTF8.GetString(recResult, 0, recLength));
//Console.WriteLine("recive message from {0} : {1}",
// clientSocket.RemoteEndPoint.ToString(),
// Encoding.UTF8.GetString(recResult, 0, recLength));
}
catch (Exception e)
{
connected = false;
//Console.WriteLine(e.Message);
MessageBox.Show("与服务器断开连接......");
//clientSocket.Shutdown(SocketShutdown.Both);
//clientSocket.Close();
Thread.Sleep(30000);
MessageBox.Show("正在尝试重新连接......");
//ConnectToServer(IPAddress.Parse(serverIP), client);
clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
while (!connected)
{
try
{
clientSocket.Connect(new IPEndPoint(IPAddress.Parse(serverIP), port));
Console.WriteLine("connect to the server successful！");
connected = true;
clientSocket.Send(Encoding.UTF8.GetBytes("newconnection|" + Model.username));
//开启消息和接收消息的线程
//client.getMessage(clientSocket);
recivethread = new Thread(RecMessage);
recivethread.IsBackground = true;
recivethread.Start(client);
}
catch (Exception e1)
{
MessageBox.Show("与连接失败......");
Console.WriteLine(e1.Message);
//GetIPAndPort();
Thread.Sleep(30000);
MessageBox.Show("正在尝试重新连接......");
}
}
break;
}
}
}
private static void GetAndCheckIpAddress()
{
string tempIP = Console.ReadLine();
if (tempIP.Length <= 0) return;
if (IsIpAddress(tempIP))
{
serverIP = tempIP;
}
else
{
Console.WriteLine("the IP you‘ve enter is not right,please enter again ,default is :127.0.0.1");
GetAndCheckIpAddress();
}
}
private static bool IsIpAddress(string str)
{
string[] strings = str.Split(‘.‘);
if (strings.Length != 4) return false;
else
{
for (int i = 0; i < 4; i++)
{
string tempstring = strings[i];
if (tempstring == "") return false;
int temp = Convert.ToInt32(tempstring);
if (temp >= 0 && temp <= 255) continue;
else return false;
}
}
return true;
}
}
}
这个是socket客户端类Client，这个类开了一个专门接收消息的接口，实际用的时候要传入实现了 interface_client 接口的类的对象
使用接口是为了能够根据情况的不懂，对接收到的数据进行不同的解析方式，而且不会乱。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Sockets;
using System.Text;
using System.Windows;
namespace wechat
{
class MyClient : Interface_client
{
public delegate void ReciveMessageHandle(string content);
public static ReciveMessageHandle ReciveMessage;
private static byte[] recResult = new byte[2048];
string getdata;
void Interface_client.getMessage(System.Net.Sockets.Socket clientSocket)
{
//while (true)
//{
try
{
int recLength = clientSocket.Receive(recResult);
getdata = Encoding.UTF8.GetString(recResult, 0, recLength);
if (getdata.Length > 0)
ReciveMessage(getdata);
//MessageBox.Show(getdata);
//getMessage(Encoding.UTF8.GetString(recResult, 0, recLength));
//Console.WriteLine("recive message from {0} : {1}",
// clientSocket.RemoteEndPoint.ToString(),
// Encoding.UTF8.GetString(recResult, 0, recLength));
}
catch (Exception e)
{
Console.WriteLine(e.Message);
clientSocket.Shutdown(SocketShutdown.Both);
clientSocket.Close();
//break;
}
//}
}
}
}
实现了interface_client 接口的类 MyClient ，实现了具体接收数据的方法，这里仅简单的接收字符串。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using BaseSqlHelper;
using System.Data.SqlClient;
using System.Data;
using System.Xml;
using System.IO;
namespace wechat
{
class DBTool
{
static SqlHelper helper = new SqlHelper(@"Data Source=MENG\SQLEXPRESS;Initial Catalog=wechat;Integrated Security=True");
public static int register(string username,string pwd){
try{ return helper.ExecuteNonQuery("insert into users(username,pwd,usertype) values (@username,@pwd,@usertype)",
new SqlParameter("@username", username), new SqlParameter("@pwd", pwd), new SqlParameter("@usertype", "0"));
}
catch{return 0;}
}
public static int login(string username,string pwd){
try{ return (int)helper.ExecuteScalar("select count(1) from users where [email protected] and pwd = @pwd",
new SqlParameter("@username", username), new SqlParameter("@pwd", pwd));
}
catch{return 0;}
}
public static DataTable search(string username, string findusername)
{
return helper.GetDataSet(@"select * ,type = case when usertype=‘0‘ then ‘普通用户‘ else ‘公众号‘ end
from users where username != @username and username like ‘%‘[email protected]+‘%‘", new SqlParameter("@username", username),
new SqlParameter("@findusername", findusername)).Tables[0];
}
public static DataTable getuserinfo(string username,string viewusername)
{
return helper.GetDataSet(@"select * ,type = case when usertype=‘0‘ then ‘普通用户‘ else ‘公众号‘ end ,
(select COUNT(1) from friend where [email protected] and [email protected]) isfriend
from users where username [email protected]", new SqlParameter("@username", username), new SqlParameter("@viewusername", viewusername)).Tables[0];
}
public static int addfriend(string username, string viewusername)
{
try
{
return helper.ExecuteNonQuery("insert into friend(username,friendname) values (@username,@viewusername)",
new SqlParameter("@username", username), new SqlParameter("@viewusername", viewusername));
}
catch { return 0; }
}
public static int delfriend(string username, string viewusername)
{
try
{
return helper.ExecuteNonQuery("delete from friend where [email protected] and [email protected]",
new SqlParameter("@username", username), new SqlParameter("@viewusername", viewusername));
}
catch { return 0; }
}
public static DataTable getmyfriend(string username)
{
return helper.GetDataSet(@"select users.* ,[type] = case when users.usertype=‘0‘ then ‘普通用户‘ else ‘公众号‘ end
from friend left join users on users.username = friend.friendname where friend.username = @username ",
new SqlParameter("@username", username)).Tables[0];
}
public static int addhistdialog(string username, string viewusername)
{
try
{
return helper.ExecuteNonQuery(@"if exists (select * from histdialog where fromusername [email protected] and tousername [email protected])
return else insert into histdialog(fromusername,tousername) values (@fromusername,@tousername)",
new SqlParameter("@tousername", username), new SqlParameter("@fromusername", viewusername));
}
catch { return 0; }
}
public static DataTable gethistdialog(string username)
{
return helper.GetDataSet(@"
select users.* ,[type] = case when users.usertype=‘0‘ then ‘普通用户‘ else ‘公众号‘ end ,
(select count(1) from messages where messages.tousername=histdialog.tousername
and messages.fromusername=histdialog.fromusername and readstate=‘0‘ )unread
from histdialog
left join users on users.username = histdialog.fromusername
where histdialog.tousername = @username",
new SqlParameter("@username", username)).Tables[0];
}
public static int getunreadcount(string username)
{
try
{
return (int)helper.ExecuteScalar("select count(1) from messages where [email protected] and readstate=‘0‘",
new SqlParameter("@username", username));
}
catch { return 0; }
}
public static int setreaded(string username,string fromusername)
{
try
{
return (int)helper.ExecuteScalar("update messages set readstate=‘1‘ where [email protected] and [email protected]",
new SqlParameter("@username", username), new SqlParameter("@fromusername", fromusername));
}
catch { return 0; }
}
public static DataTable getmessageofdialog(string username,string fromusername)
{
return helper.GetDataSet(@"select * from messages where ([email protected] and fromusername [email protected]) or ([email protected] and tousername [email protected]) order by id asc",
new SqlParameter("@username", username), new SqlParameter("@fromusername", fromusername)).Tables[0];
}
public static Dictionary<string ,string> getxmlstring(string xmlcontent)
{
DataSet dsData = new DataSet();
Dictionary<string, string> dictionary = new Dictionary<string, string>();
dsData.ReadXml(new XmlTextReader(new StringReader(xmlcontent)));
DataTable dt = dsData.Tables["HH"];
foreach (DataRow dr in dt.Rows)
{
foreach (DataColumn dc in dr.Table.Columns)
{
string n = dc.ColumnName;
string value = dr[n].ToString();
dictionary.Add(n, value);
}
}
return dictionary;
}
}
}
DBTool类是对数据库数据操作的类（这里需要说明的是，在实际的这类客户端开发中，并不会直接的链接到数据库读写数据，
而是通过向服务器发送请求，服务器返回比如xml或者json之类的数据，客户端再解析，我猜也因该是这样的。这里为了偷懒，就除了通讯，其它的聊天记录，联系人等直接通过数据库获得）
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace wechat
{
class Model
{
public static string userid = "";
public static string username = "";
public static string viewusername = "0";
public static string ontalkingusername = "";
public static Client client;
public static void SendMessage(string content)
{
client.Send(Model.username + "|" + Model.viewusername + "|" + content + "|" + DateTime.Now.ToString());
}
}
}
这个模型类是一个静态类，里边有一些静态属性，在这里用于保存一些数据用于传递数据，这个是本文所采用的解决方案，目前也不知道有什么好的办法在wpf里边传递数据，望知道的朋友不吝赐教。
if (DBTool.login(text_username.Text, text_pwd.Password) == 1)
{
//MessageBox.Show("登录成功！");
Model.username = text_username.Text;
new MainWindow().Show();
this.Hide();
Model.client = new Client(new MyClient());
Model.client.Start();
}
客户端在用户登录成功后才开始链接到我们开发的服务器（后面会讲到），只有连接上了服务器才能进行通讯。
注意：这里的client 用静态类里的client 来保存，是为了我们在其它地方发送消息时直接使用静态类里的client 发送消息即可。
前台界面用了较多的委托事件来触发消息的提示和某些ui的刷新，这个在这里也不是一言两语说得清楚，还不清楚委托的朋友可以先了解一下再看代码，这样有利于理解。
时间： 2024-09-30 16:11:53