这是来公司做的第二个项目实例。最近在学习WCF方面的知识，看了一些资料，于是做了这个可以实现聊天功能的项目实例。
新建WCF服务和Silverlight项目就不说了主要来看代码：
WCF服务契约与数据契约：
<span > [ServiceContract(CallbackContract = typeof(IMessageCallBack))]</span>public interface IMessageManage { [OperationContract] bool SendMessage(MessageInfo msg); [OperationContract] bool RequestMessage(UserInfo user); [OperationContract] List<UserInfo> GetUserInfo(); [OperationContract] bool createuser(UserInfo user); } public interface IMessageCallBack {<span > [OperationContract(IsOneWay = true)] voID GetMessage(MessageInfo message);</span> }<pre name="code" ><span >[DataContract]</span> public class MessageInfo { [DataMember] public UserInfo FromUser { get; set; } [DataMember] public UserInfo ToUser { get; set; } [DataMember] public string Content { get; set; } [DataMember] public DateTime SendTime { get; set; } }[DataContract] public class UserInfo { [DataMember] public int ID { get; set; } [DataMember] public string name { get; set; } } WCF的实现： using System;using System.Collections.Generic;using System.linq;using System.Runtime.Serialization;using System.ServiceModel;using System.Text;<span >using WcfModel;</span>namespace WcfService{ public class MessageService : IMessageManage { private static Dictionary<int,IMessageCallBack> DicCallChannel = new Dictionary<int,IMessageCallBack>(); public static List<UserInfo> getuserTemp = new List<UserInfo>(); private int UserID = 0; public bool createuser(UserInfo user) { if (getuserTemp == null) getuserTemp = new List<UserInfo>(); bool r = false; foreach (UserInfo List in getuserTemp) { if (List.ID.Equals(user.ID)) { r = true; } } if (r) { return false; } getuserTemp.Add(user); return true; } public bool SendMessage(MessageInfo msg) { if (DicCallChannel.Keys.Contains(msg.ToUser.ID)) { DicCallChannel[msg.ToUser.ID].GetMessage(msg); return true; } return false; } public bool RequestMessage(UserInfo user) { IMessageCallBack channel = OperationContext.Current.GetCallbackChannel<IMessageCallBack>(); if (!DicCallChannel.Keys.Contains(user.ID)) { DicCallChannel.Add(user.ID,channel); UserID = user.ID; OperationContext.Current.Channel.Closing += Channel_Closing; } return true; } voID Channel_Closing(object sender,EventArgs e) { if (DicCallChannel.Keys.Contains(UserID)) { DicCallChannel.Remove(UserID); } } public List<UserInfo> GetUserInfo() { return getuserTemp; } }}MainPage前台代码： <UserControl x:Class="SilverlightApplication.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/Expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignHeight="600" d:DesignWIDth="800" xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk" xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"> <ScrollVIEwer HorizontalScrollbarVisibility="auto" VerticalScrollbarVisibility="auto" > <GrID x:name="LayoutRoot" Background="White" ScrollVIEwer.HorizontalScrollbarVisibility="auto" ScrollVIEwer.VerticalScrollbarVisibility="auto" Height="700"> <StackPanel OrIEntation="Vertical" VerticalAlignment="Center" HorizontalAlignment="Center" ScrollVIEwer.HorizontalScrollbarVisibility="auto" ScrollVIEwer.VerticalScrollbarVisibility="auto" Height="456" margin="286,92,259,152" WIDth="228"> <!--<button x:name="btncreateuser1" Content="Create User1" WIDth="100" margin="0,10,0" Click="btncreateuser1_Click" /> <button x:name="btncreateuser2" Content="Create User2" WIDth="100" margin="0,0" Click="btncreateuser2_Click" />--> <telerik:GroupBox Height="300" name="groupBox2" WIDth="200" header="收"> <TextBox x:name="txtContentRecord" WIDth="182" Height="261" IsReadonly="True" margin="0,0" textwrapPing="Wrap" /> </telerik:GroupBox> <telerik:GroupBox Height="107" name="groupBox3" WIDth="200" header="发" margin="0,30,0"> <StackPanel> <TextBox x:name="txtContent" WIDth="182" Height="30" margin="0,0" AllowDrop="False" AcceptsReturn="True" textwrapPing="Wrap" /> <button x:name="btnSend" Content="Send" WIDth="100" margin="0,0" Click="btnSend_Click"> </button> </StackPanel> </telerik:GroupBox> </StackPanel> <StackPanel margin="27,514,152"> <!--<ListBox WIDth="100" Height="60" x:name="lstgu" ></ListBox>--> <!--<TextBox x:name="txtGU" WIDth="100" Height="100"></TextBox>--> <StackPanel OrIEntation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center" margin="0,0" WIDth="202" Height="209"> <telerik:GroupBox Height="180" name="groupBox4" WIDth="118" header="User List" margin="10,0"> <sdk:DataGrID DataContext="{Binding}" autoGenerateColumns="False" Height="125" name="dataGrID1" WIDth="89" margin="0,0" SelectionChanged="dataGrID1_SelectionChanged" IsReadonly="True"> <sdk:DataGrID.Columns> <sdk:DataGrIDTextColumn CanUserReorder="True" CanUserResize="True" CanUserSort="True" header="ID" WIDth="auto" Binding="{Binding ID}" /> <sdk:DataGrIDTextColumn CanUserReorder="True" CanUserResize="True" CanUserSort="True" header="name" WIDth="auto" Binding="{Binding name}" /> </sdk:DataGrID.Columns> </sdk:DataGrID> </telerik:GroupBox> <button x:name="btnRefreshUser" Click="btnRefreshUser_Click" WIDth="63" Height="20" margin="10,0" IsEnabled="False">Refresh</button> </StackPanel> <telerik:GroupBox Height="116" name="groupBox1" WIDth="202" header="User Login"> <StackPanel> <StackPanel OrIEntation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center" margin="0,0"> <TextBlock TextAlignment="Center" VerticalAlignment="Center">ID:</TextBlock> <TextBox x:name="CurrentID" WIDth="60" margin="21,0" ></TextBox> </StackPanel> <StackPanel OrIEntation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center"> <TextBlock TextAlignment="Center" VerticalAlignment="Center">name:</TextBlock> <TextBox x:name="Currentname" WIDth="60" ></TextBox> </StackPanel> <StackPanel x:name="login"> <button x:name="Login" Click="Login_Click" WIDth="95" margin="0,0">Login</button> </StackPanel> </StackPanel> </telerik:GroupBox> <!--<telerik:GroupBox Height="134" name="groupBox5" WIDth="202" header="Create User"> <StackPanel> <StackPanel OrIEntation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center" margin="0,0"> <TextBlock TextAlignment="Center" VerticalAlignment="Center">ID:</TextBlock> <TextBox x:name="createuserID" WIDth="60" margin="21,0"></TextBox> </StackPanel> <StackPanel OrIEntation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center"> <TextBlock TextAlignment="Center" VerticalAlignment="Center">name:</TextBlock> <TextBox x:name="createusername" WIDth="60"></TextBox> </StackPanel> <StackPanel OrIEntation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center" margin="0,0"> <button x:name="btncreateuser" Click="btncreateuser_Click">createuser</button> </StackPanel> </StackPanel> </telerik:GroupBox>--> </StackPanel> </GrID> </ScrollVIEwer></UserControl>MainPage后台代码： using System;using System.Collections.Generic;using System.linq;using System.Net;using System.windows;using System.windows.Controls;using System.windows.documents;using System.windows.input;using System.windows.Media;using System.windows.Media.Animation;using System.windows.Shapes;using SilverlightApplication.MessageService;using System.ComponentModel;using System.Collections.ObjectModel;namespace SilverlightApplication{ public partial class MainPage : UserControl { MessageInfo message = new MessageInfo(); public List<UserInfo> Listuser = new List<UserInfo>(); //string p; //string p_2; //string p_3; //bool refresh = false; public MainPage() { InitializeComponent(); getListuser(); //UserInfo rtouser = new UserInfo(); //rtouser.ID=Convert.ToInt32(this.CurrentID.Text); //rtouser.name = this.Currentname.Text; } //public MainPage(string p,string p_2,string p_3) //{ // InitializeComponent(); // this.p = p; // this.p_2 = p_2; // this.CurrentID.Text = p; // this.Currentname.Text = p_2; // this.txtContentRecord.Text = p_3; // rgetListuser(); // this.CurrentID.IsReadonly = true; // this.Currentname.IsReadonly = true; // this.login.Visibility = Visibility.Collapsed; //} public voID getListuser() { MessageManageClIEnt clIEnt = new MessageManageClIEnt(); clIEnt.GetUserInfoCompleted += new EventHandler<GetUserInfoCompletedEventArgs>(clIEnt_GetUserInfoCompleted); clIEnt.GetUserInfoAsync(); } voID clIEnt_GetUserInfoCompleted(object sender,GetUserInfoCompletedEventArgs e) { if (e.Result != null) { foreach (var List in e.Result) { Listuser.Add(List); } //this.dataGrID1.ItemsSource = Listuser; } else { MessageBox.Show("当前用户列表为空！"); } } //public voID rgetListuser() //{ // ChatServiceClIEnt clIEnt = new ChatServiceClIEnt(); // clIEnt.GetUserInfoCompleted += new EventHandler<GetUserInfoCompletedEventArgs>(clIEnt_GetUserInfoCompletedR); // clIEnt.GetUserInfoAsync(); //} //voID clIEnt_GetUserInfoCompletedR(object sender,GetUserInfoCompletedEventArgs e) //{ // Listuser.Clear(); // if (e.Result != null) // { // foreach (var List in e.Result) // { // Listuser.Add(List); // } // this.dataGrID1.ItemsSource = Listuser; // } // else // { // MessageBox.Show("当前用户列表为空！"); // } //} //private ObservableCollection<UserInfo> _Listuser = null; //private voID btncreateuser1_Click(object sender,RoutedEventArgs e) //{ // this.btncreateuser2.IsEnabled = false; // ChatServiceClIEnt clIEnt = new ChatServiceClIEnt(); // UserInfo formUser = new UserInfo() // { // ID = 123,// name = "张三" // }; // //creatuser1 = formUser; // //getuser.Add(formUser); // UserInfo toUser = new UserInfo() // { // ID = 234,// name = "李四",// }; // message.FromUser = formUser; // message.ToUser = toUser; // message.Content = txtContent.Text; // message.SendTime = DateTime.Now; // clIEnt.RequestMessageCompleted += new EventHandler<RequestMessageCompletedEventArgs>(clIEnt_RequestMessageCompleted); // clIEnt.RequestMessageAsync(formUser); // //clIEnt.GetUserInfoAsync(formUser); // clIEnt.GetMessageReceived += new EventHandler<GetMessageReceivedEventArgs>(clIEnt_GetMessageReceived); // //clIEnt.RequestMessageCompleted += (rs,re) => // //{ // // if (re.Result) // // { // // MessageBox.Show("用户" + formUser.ID + "创建成功！"); // // } // //}; // //clIEnt.GetMessageReceived += (gs,ge) => // //{ // // if (ge.Error == null) // // { // // txtContentRecord.Text += "\r" + "来自:" + ge.message.FromUser.name + ",内容:" + ge.message.Content + ",时间:" + ge.message.SendTime.ToShortTimeString(); // // } // //}; //} //voID clIEnt_RequestMessageCompleted(object sender,RequestMessageCompletedEventArgs e) //{ // if (e.Result) // { // MessageBox.Show("通道创建成功！"); // } //} //voID clIEnt_GetMessageReceived(object sender,GetMessageReceivedEventArgs e) //{ // if (e.Error == null) // { // //txtContentRecord.Text +="\r\n"+ "来自:" + e.message.FromUser.name + ",内容:" + e.message.Content + ",时间:" + e.message.SendTime.ToShortTimeString()+"\r\n"; // if (this.txtContentRecord.Text == "") // { // txtContentRecord.Text +=e.message.FromUser.name + e.message.SendTime.ToShortTimeString() + "："+"\r\n" + e.message.Content ; // } // else // { // txtContentRecord.Text += "\r\n" + e.message.FromUser.name + e.message.SendTime.ToShortTimeString() + ":" + "\r\n" + e.message.Content; // } // } //} //private voID btncreateuser2_Click(object sender,RoutedEventArgs e) //{ // this.btncreateuser1.IsEnabled = false; // ChatServiceClIEnt clIEnt = new ChatServiceClIEnt(); // UserInfo formUser = new UserInfo() // { // ID = 234,// name = "李四" // }; // //creatuser2 = formUser; // //getuser.Add(formUser); // UserInfo toUser = new UserInfo() // { // ID = 123,// name = "张三",// }; // message.FromUser = formUser; // message.ToUser = toUser; // message.Content = txtContent.Text; // message.SendTime = DateTime.Now; // clIEnt.RequestMessageCompleted += new EventHandler<RequestMessageCompletedEventArgs>(clIEnt_RequestMessageCompleted1); // clIEnt.RequestMessageAsync(formUser); // clIEnt.GetMessageReceived += new EventHandler<GetMessageReceivedEventArgs>(clIEnt_GetMessageReceived1); // //clIEnt.GetUserInfoAsync(formUser); // //clIEnt.RequestMessageCompleted += (rs,时间:" + ge.message.SendTime.ToShortTimeString(); // // } // //}; //} private voID btnSend_Click(object sender,RoutedEventArgs e) { if (this.txtContent.Text == "" || this.dataGrID1.SelectedItem == null) { MessageBox.Show("消息内容为空或没有选择聊天对象！"); } else { MessageManageClIEnt clIEnt = new MessageManageClIEnt(); message.Content = txtContent.Text; message.SendTime = DateTime.Now; clIEnt.SendMessageCompleted += new EventHandler<SendMessageCompletedEventArgs>(clIEnt_SendMessageCompleted); clIEnt.SendMessageAsync(message); //clIEnt.SendMessageCompleted += (ds,de) => //{ // if (de.Result) // { // MessageBox.Show("发送成功!"); // } // else // { // MessageBox.Show("发送失败!"); // } //}; } } voID clIEnt_SendMessageCompleted(object sender,SendMessageCompletedEventArgs e) { if (e.Result) { if (this.txtContentRecord.Text == "") { this.txtContentRecord.Text += this.Currentname.Text + DateTime.Now.ToShortTimeString() + ":" + " \r\n" + this.txtContent.Text; this.txtContent.Text = ""; MessageBox.Show("发送成功！"); } else { this.txtContentRecord.Text += "\r\n" + this.Currentname.Text + DateTime.Now.ToShortTimeString() + ":" + " \r\n" + this.txtContent.Text; this.txtContent.Text = ""; MessageBox.Show("发送成功！"); } } else { MessageBox.Show("发送失败！"); this.txtContent.Text = ""; } } //private voID btnGU_Click(object sender,RoutedEventArgs e) //{ // ChatServiceClIEnt clIEnt = new ChatServiceClIEnt(); // clIEnt.GetUserInfoCompleted += new EventHandler<GetUserInfoCompletedEventArgs>(clIEnt_GetUserInfoCompleted); // clIEnt.GetUserInfoAsync(); // int i; // for (i = 0; i < getuser.Count; i++) // { // clIEnt.GetUserInfoAsync(getuser[i]); // } //} //private voID btnGU_Click(object sender,RoutedEventArgs e) //{ // MessageManageClIEnt clIEnt = new MessageManageClIEnt(); // clIEnt.GetUserInfoCompleted += new EventHandler<GetUserInfoCompletedEventArgs>(clIEnt_GetUserInfoCompleted); // clIEnt.GetUserInfoAsync(); //} //voID clIEnt_GetUserInfoCompleted(object sender,GetUserInfoCompletedEventArgs e) //{ // //this.lstgu.ItemsSource = e.Result; // this.dataGrID1.ItemsSource = e.Result; // //List<UserInfo> List=new List<UserInfo>(); // //List = e.Result; // //this.lstgu.Items.Add( // // new TextBlock // //{ // // Text = "用户名：",// // textwrapPing = textwrapPing.Wrap // //} // //); //UserInfo abc=new UserInfo(); //abc = e.Result; //if (this.txtGU.Text == "") //{ // this.txtGU.Text += "ID:" + e.Result.ID + "\r\n" + "name:" + e.Result.name; //} //else //{ // this.txtGU.Text += "\r\n" + "ID:" + e.Result.ID + "\r\n" + "name:" + e.Result.name; //} //} //private voID btncreateuser_Click(object sender,RoutedEventArgs e) //{ // UserInfo create = new UserInfo(); // create.ID = Convert.ToInt32(this.createuserID.Text); // create.name = this.createusername.Text; // ChatServiceClIEnt clIEnt = new ChatServiceClIEnt(); // clIEnt.createuserCompleted += new EventHandler<createuserCompletedEventArgs>(clIEnt_createuserCompleted); // clIEnt.createuserAsync(create); // clIEnt.GetUserInfoCompleted += new EventHandler<GetUserInfoCompletedEventArgs>(clIEnt_GetUserInfoCompleted); // clIEnt.GetUserInfoAsync(); // App app = (App)Application.Current; // app.RedirectTo(new MainPage()); //} //voID clIEnt_createuserCompleted(object sender,createuserCompletedEventArgs e) //{ // if (e.Result!=null) // { // MessageBox.Show("用户创建成功！"); // //_Listuser = e.Result; // //this.dataGrID1.ItemsSource = e.Result; // this.createuserID.Text = ""; // this.createusername.Text = ""; // this.groupBox1.Visibility = Visibility.Visible; // this.CurrentID.Text = Convert.ToString(e.Result.ID); // this.Currentname.Text = e.Result.name; // this.groupBox5.Visibility = Visibility.Collapsed; // //lstgu.Items.Add // // ( // // new TextBlock // // { // // Text = "ID:" + e.Result.ID+"\n"+ "name：" + e.Result.name,// // textwrapPing = textwrapPing.Wrap // // } // // ); // } // else // { // MessageBox.Show("用户创建失败！"); // } //} //private voID btnGU_Click(object sender,RoutedEventArgs e) //{ // ChatServiceClIEnt clIEnt = new ChatServiceClIEnt(); // clIEnt.GetUserInfoCompleted += new EventHandler<GetUserInfoCompletedEventArgs>(clIEnt_GetUserInfoCompleted); // clIEnt.GetUserInfoAsync(); //} private voID dataGrID1_SelectionChanged(object sender,SelectionChangedEventArgs e) { UserInfo stouser = new UserInfo(); stouser = (UserInfo)this.dataGrID1.SelectedItem; if (this.dataGrID1.SelectedItem == null) { tongxin(); } else { MessageManageClIEnt clIEnt = new MessageManageClIEnt(); UserInfo formUser = new UserInfo() { ID = Convert.ToInt32(this.CurrentID.Text),name = this.Currentname.Text,}; UserInfo toUser = new UserInfo() { ID = stouser.ID,name = stouser.name,}; message.FromUser = formUser; message.ToUser = toUser; message.Content = txtContent.Text; message.SendTime = DateTime.Now; clIEnt.RequestMessageCompleted += new EventHandler<RequestMessageCompletedEventArgs>(clIEnt_RequestMessageCompleted); clIEnt.RequestMessageAsync(formUser); clIEnt.GetMessageReceived += new EventHandler<GetMessageReceivedEventArgs>(clIEnt_GetMessageReceived); } } voID clIEnt_RequestMessageCompleted(object sender,RequestMessageCompletedEventArgs e) { if (e.Result) { MessageBox.Show("当前用户通信通道创建成功！"); } } voID clIEnt_GetMessageReceived(object sender,GetMessageReceivedEventArgs e) { if (e.Error == null) { //txtContentRecord.Text += "\r\n"+"来自:" + e.message.FromUser.name + ",时间:" + e.message.SendTime.ToShortTimeString()+"\r\n"; if (this.txtContentRecord.Text == "") { txtContentRecord.Text += e.message.FromUser.name + e.message.SendTime.ToShortTimeString() + "：" + "\r\n" + e.message.Content; } else { txtContentRecord.Text += "\r\n" + e.message.FromUser.name + e.message.SendTime.ToShortTimeString() + ":" + "\r\n" + e.message.Content; } } } private voID Login_Click(object sender,RoutedEventArgs e) { if (this.CurrentID.Text == "" || this.Currentname.Text == "") { MessageBox.Show("ID或name不能为空！"); } else { UserInfo currentuser = new UserInfo(); currentuser.ID = Convert.ToInt32(this.CurrentID.Text); currentuser.name = this.Currentname.Text; bool isSuccess = false; foreach (UserInfo u in Listuser) { if (u.ID.Equals(currentuser.ID) && u.name.Equals(currentuser.name)) { isSuccess = true; } } if (isSuccess) { MessageBox.Show("用户" + currentuser.name + "登录成功！"); this.btnRefreshUser.IsEnabled = true; this.dataGrID1.ItemsSource = Listuser; this.CurrentID.IsReadonly = true; this.Currentname.IsReadonly = true; this.login.Visibility = Visibility.Collapsed; tongxin(); } else { MessageBox.Show("用户" + currentuser.name + "登录失败！"); } } } private voID btnRefreshUser_Click(object sender,RoutedEventArgs e) { //App app = (App)Application.Current; //app.RedirectTo(new MainPage(this.CurrentID.Text.Trim(),this.Currentname.Text.Trim(),this.txtContentRecord.Text.Trim())); //this.dataGrID1.ItemsSource = null; //refresh = true; MessageManageClIEnt clIEnt = new MessageManageClIEnt(); clIEnt.GetUserInfoCompleted += new EventHandler<GetUserInfoCompletedEventArgs>(clIEnt_GetUserInfoCompleted12); clIEnt.GetUserInfoAsync(); } voID clIEnt_GetUserInfoCompleted12(object sender,GetUserInfoCompletedEventArgs e) { if (e.Result != null) { List<UserInfo> rListuser = new List<UserInfo>(); foreach (var List in e.Result) { rListuser.Add(List); } this.dataGrID1.ItemsSource = rListuser; } else { MessageBox.Show("当前用户列表为空！"); } } public voID tongxin() { MessageManageClIEnt clIEnt = new MessageManageClIEnt(); UserInfo formUser = new UserInfo() { ID = Convert.ToInt32(this.CurrentID.Text),}; UserInfo toUser = new UserInfo() { ID = formUser.ID,name = formUser.name,}; message.FromUser = formUser; message.ToUser = toUser; message.Content = txtContent.Text; message.SendTime = DateTime.Now; clIEnt.RequestMessageCompleted += new EventHandler<RequestMessageCompletedEventArgs>(clIEnt_RequestMessageCompleted123); clIEnt.RequestMessageAsync(formUser); clIEnt.GetMessageReceived += new EventHandler<GetMessageReceivedEventArgs>(clIEnt_GetMessageReceived); } voID clIEnt_RequestMessageCompleted123(object sender,RequestMessageCompletedEventArgs e) { if (e.Result) { //MessageBox.Show("当前用户通信通道创建成功！"); } } }} 本实例的一些配置主要参照了下文：
http://blog.csdn.net/cyb331/article/details/9185801
感谢该博主。
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