刚开始学,写个简单的sniffer可是就是测试不通过。。。? maxlength=

改了半天累了。还是没搞好,发上来大家一起看看吧。。是照着一本书写的

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace SimpleSniff
{
    /**//// <summary>
    /// Form1 的摘要说明?1br/>    /// </summary>
    public class SniffWindow : System.Windows.Forms.Form
    {
        private System.Windows.Forms.PictureBox pictureBox1;
        private System.Windows.Forms.ListBox resultListBox;
        private System.Windows.Forms.Button startButton;
        private System.Windows.Forms.Button stopButton;
        private System.Windows.Forms.Button clearButton;
        private System.Windows.Forms.ComboBox addressComboBox;
        private System.Windows.Forms.Label label1;
        private SniffSocket mySniffSocket;
        /**//// <summary>
        /// 必需的设计器变量?1br/>        /// </summary>
        private System.ComponentModel.Container components = null;

        public SniffWindow()
        {
            //
            // Windows 窗体设计器支持所必需?1br/>            //
            InitializeComponent();

            //
            // TODO: ?3#160;InitializeComponent 调用后添加任何构造函数代?1br/>            //
        }

        /**//// <summary>
        /// 清理所有正在使用的资源?1br/>        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        Windows Form Designer generated code#region Windows Form Designer generated code
        /**//// <summary>
        /// 设计器支持所需的方?3#160;- 不要使用代码编辑器修?1br/>        /// 此方法的内容?1br/>        /// </summary>
        private void InitializeComponent()
        {
            System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(SniffWindow));
            this.resultListBox = new System.Windows.Forms.ListBox();
            this.startButton = new System.Windows.Forms.Button();
            this.stopButton = new System.Windows.Forms.Button();
            this.clearButton = new System.Windows.Forms.Button();
            this.addressComboBox = new System.Windows.Forms.ComboBox();
            this.pictureBox1 = new System.Windows.Forms.PictureBox();
            this.label1 = new System.Windows.Forms.Label();
            this.SuspendLayout();
            // 
            // resultListBox
            // 
            this.resultListBox.ItemHeight = 12;
            this.resultListBox.Name = "resultListBox";
            this.resultListBox.Size = new System.Drawing.Size(288, 208);
            this.resultListBox.TabIndex = 0;
            this.resultListBox.SelectedIndexChanged += new System.EventHandler(this.resultListBox_SelectedIndexChanged);
            // 
            // startButton
            // 
            this.startButton.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.startButton.Location = new System.Drawing.Point(8, 216);
            this.startButton.Name = "startButton";
            this.startButton.Size = new System.Drawing.Size(40, 20);
            this.startButton.TabIndex = 1;
            this.startButton.Text = "开?1/SPAN>";
            this.startButton.Click += new System.EventHandler(this.startButton_Click);
            // 
            // stopButton
            // 
            this.stopButton.Location = new System.Drawing.Point(56, 216);
            this.stopButton.Name = "stopButton";
            this.stopButton.Size = new System.Drawing.Size(40, 20);
            this.stopButton.TabIndex = 2;
            this.stopButton.Text = "停止";
            this.stopButton.Click += new System.EventHandler(this.stopButton_Click);
            // 
            // clearButton
            // 
            this.clearButton.Location = new System.Drawing.Point(104, 216);
            this.clearButton.Name = "clearButton";
            this.clearButton.Size = new System.Drawing.Size(40, 20);
            this.clearButton.TabIndex = 3;
            this.clearButton.Text = "清除";
            this.clearButton.Click += new System.EventHandler(this.clearButton_Click);
            // 
            // addressComboBox
            // 
            this.addressComboBox.Location = new System.Drawing.Point(200, 216);
            this.addressComboBox.Name = "addressComboBox";
            this.addressComboBox.Size = new System.Drawing.Size(80, 20);
            this.addressComboBox.TabIndex = 4;
            this.addressComboBox.Text = "comboBox1";
            // 
            // pictureBox1
            // 
            this.pictureBox1.Image = ((System.Drawing.Bitmap)(resources.GetObject("pictureBox1.Image")));
            this.pictureBox1.Location = new System.Drawing.Point(8, 240);
            this.pictureBox1.Name = "pictureBox1";
            this.pictureBox1.Size = new System.Drawing.Size(144, 32);
            this.pictureBox1.TabIndex = 5;
            this.pictureBox1.TabStop = false;
            // 
            // label1
            // 
            this.label1.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(224)), ((System.Byte)(224)), ((System.Byte)(224)));
            this.label1.Location = new System.Drawing.Point(176, 256);
            this.label1.Name = "label1";
            this.label1.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
            this.label1.Size = new System.Drawing.Size(112, 16);
            this.label1.TabIndex = 6;
            this.label1.Text = "随想   sjett";
            // 
            // SniffWindow
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(292, 278);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.label1,
                                                                          this.pictureBox1,
                                                                          this.addressComboBox,
                                                                          this.clearButton,
                                                                          this.stopButton,
                                                                          this.startButton,
                                                                          this.resultListBox});
            this.Name = "SniffWindow";
            this.Text = "SimpleSniff";
            this.Load += new System.EventHandler(this.SniffWindow_Load);
            this.ResumeLayout(false);

        }
        #endregion

        /**//// <summary>
        /// 应用程序的主入口点?1br/>        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }

        private void SniffWindow_Load(object sender, System.EventArgs e)
        {
            ManagementObjectSearcher query1 = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection queryCollection1 = query1.get();
            string[] IPString =new string [10];
            int x=0;
            string[] temp;
            foreach (ManagementObject mo in queryCollection1 )
            {
                temp=mo["IPAddress"] as string[];
                    if(temp!=null)
                    {
                        foreach(string st in temp)
                        {
                            IPString[x]=st;
                            x++;
                        }
                    }
            }
            mySniffSocket=new SniffSocket ();
            for(int y=0;y<x;y++)
            {
                if(IPString[y]!="")
                    addressComboBox.Items .Add (IPString[y]);
            }
            addressComboBox.Text =addressComboBox.Items[0] as string;
            try 
            {
                mySniffSocket.CreateAndBindSocket (addressComboBox.Text );
            }
            catch(SniffSocket.SniffSocketException ex)
            {
                MessageBox.Show (this,ex.Message );

            }
            mySniffSocket.PacketArrival +=new SniffSocket .PacketArrividEventHandler(DataArrival);
        }

        private void startButton_Click(object sender, System.EventArgs e)
        {
            if(mySniffSocket.KeepRunning ==false)
            {
                mySniffSocket.KeepRunning =true;
                try
                {
                    mySniffSocket.Run ();
                }
                catch(SocketException)
                {
                    mySniffSocket.CreateAndBindSocket (addressComboBox.Text );
                    mySniffSocket.Run ();
                }
                startButton.Text ="暂停";
            }
            else
            {
                mySniffSocket.KeepRunning =false;
                startButton.Text ="Resume";
            }
        }

        private void stopButton_Click(object sender, System.EventArgs e)
        {
            mySniffSocket.KeepRunning =false;
            startButton.Text ="开?1/SPAN>";
            Thread.Sleep (10);
            mySniffSocket.ShutDown ();

        }

        private void clearButton_Click(object sender, System.EventArgs e)
        {
        resultListBox.Items.Clear ();
        }

        private void resultListBox_DoubleClick(object sender, System.EventArgs e)
        {
        PacketDisplay dlg=new PacketDisplay (resultListBox.SelectedItem as SniffSocket.PacketArrivedEventArgs);
            dlg.show ();
        }
        private void DataArrival(object sender,SniffSocket.PacketArrivedEventArgs e)
        {
            resultListBox.Items.Add (e);
        }

    }
}

这是MainForm.cs

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

namespace SimpleSniff
{
    /**//// <summary>
    /// PacketDisplay 的摘要说明?1br/>    /// </summary>
    public class PacketDisplay : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Label label6;
        private System.Windows.Forms.Label label7;
        private System.Windows.Forms.Label label8;
        private System.Windows.Forms.Label label9;
        private System.Windows.Forms.ListBox listBox1;
        private System.Windows.Forms.Label src_addLabel;
        private System.Windows.Forms.Label dest_addLabel;
        private System.Windows.Forms.Label src_portLabel;
        private System.Windows.Forms.Label dest_portLabel;
        private System.Windows.Forms.Label protocolLabel;
        /**//// <summary>
        /// 必需的设计器变量?1br/>        /// </summary>
        private System.ComponentModel.Container components = null;

        public PacketDisplay(SniffSocket.PacketArrivedEventArgs e)
        {
            //
            // Windows 窗体设计器支持所必需?1br/>            //
            InitializeComponent();
            src_addLabel.Text =e.OriginationAddress ;
            dest_addLabel.Text =e.DestinationAddress ;
            src_portLabel.Text =e.OriginationPort ;
            dest_portLabel.Text =e.DestinationPort ;
            protocolLabel.Text =e.Protocol ;
            int x=0;
            int y=0;
            foreach (byte b in e.MessageBuffer )
            {
                if(x==0)
                    listBox1.Items .Add (b.ToString ("x") + "\t");
                else
                    listBox1.Items [y]+=(b.ToString ("x") + "\t");
                x++;
                if (x>8)
                {
                    x=0;
                    y++;

                }
            }

            //
            // TODO: ?3#160;InitializeComponent 调用后添加任何构造函数代?1br/>            //
        }

        /**//// <summary>
        /// 清理所有正在使用的资源?1br/>        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if(components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        Windows Form Designer generated code#region Windows Form Designer generated code
        /**//// <summary>
        /// 设计器支持所需的方?3#160;- 不要使用代码编辑器修?1br/>        /// 此方法的内容?1br/>        /// </summary>
        private void InitializeComponent()
        {
            this.src_addLabel = new System.Windows.Forms.Label();
            this.dest_addLabel = new System.Windows.Forms.Label();
            this.src_portLabel = new System.Windows.Forms.Label();
            this.dest_portLabel = new System.Windows.Forms.Label();
            this.protocolLabel = new System.Windows.Forms.Label();
            this.label6 = new System.Windows.Forms.Label();
            this.label7 = new System.Windows.Forms.Label();
            this.label8 = new System.Windows.Forms.Label();
            this.label9 = new System.Windows.Forms.Label();
            this.listBox1 = new System.Windows.Forms.ListBox();
            this.SuspendLayout();
            // 
            // src_addLabel
            // 
            this.src_addLabel.Location = new System.Drawing.Point(8, 24);
            this.src_addLabel.Name = "src_addLabel";
            this.src_addLabel.Size = new System.Drawing.Size(72, 16);
            this.src_addLabel.TabIndex = 2;
            this.src_addLabel.Text = "label1";
            // 
            // dest_addLabel
            // 
            this.dest_addLabel.Location = new System.Drawing.Point(104, 24);
            this.dest_addLabel.Name = "dest_addLabel";
            this.dest_addLabel.Size = new System.Drawing.Size(80, 16);
            this.dest_addLabel.TabIndex = 3;
            this.dest_addLabel.Text = "label2";
            // 
            // src_portLabel
            // 
            this.src_portLabel.Location = new System.Drawing.Point(8, 56);
            this.src_portLabel.Name = "src_portLabel";
            this.src_portLabel.Size = new System.Drawing.Size(72, 16);
            this.src_portLabel.TabIndex = 6;
            this.src_portLabel.Text = "label3";
            // 
            // dest_portLabel
            // 
            this.dest_portLabel.Location = new System.Drawing.Point(104, 56);
            this.dest_portLabel.Name = "dest_portLabel";
            this.dest_portLabel.Size = new System.Drawing.Size(80, 16);
            this.dest_portLabel.TabIndex = 7;
            this.dest_portLabel.Text = "label4";
            // 
            // protocolLabel
            // 
            this.protocolLabel.Location = new System.Drawing.Point(216, 8);
            this.protocolLabel.Name = "protocolLabel";
            this.protocolLabel.Size = new System.Drawing.Size(72, 16);
            this.protocolLabel.TabIndex = 8;
            this.protocolLabel.Text = "label5";
            // 
            // label6
            // 
            this.label6.Font = new System.Drawing.Font("宋体", 7.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.label6.Location = new System.Drawing.Point(8, 8);
            this.label6.Name = "label6";
            this.label6.RightToLeft = System.Windows.Forms.RightToLeft.No;
            this.label6.Size = new System.Drawing.Size(86, 16);
            this.label6.TabIndex = 9;
            this.label6.Text = "source address";
            // 
            // label7
            // 
            this.label7.Font = new System.Drawing.Font("宋体", 7.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.label7.Location = new System.Drawing.Point(104, 8);
            this.label7.Name = "label7";
            this.label7.Size = new System.Drawing.Size(104, 16);
            this.label7.TabIndex = 10;
            this.label7.Text = "destination address";
            // 
            // label8
            // 
            this.label8.Font = new System.Drawing.Font("宋体", 7.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.label8.Location = new System.Drawing.Point(8, 40);
            this.label8.Name = "label8";
            this.label8.Size = new System.Drawing.Size(72, 16);
            this.label8.TabIndex = 11;
            this.label8.Text = "source port";
            // 
            // label9
            // 
            this.label9.Font = new System.Drawing.Font("宋体", 7.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.label9.Location = new System.Drawing.Point(104, 40);
            this.label9.Name = "label9";
            this.label9.Size = new System.Drawing.Size(88, 16);
            this.label9.TabIndex = 12;
            this.label9.Text = "destination port";
            // 
            // listBox1
            // 
            this.listBox1.ItemHeight = 12;
            this.listBox1.Location = new System.Drawing.Point(0, 80);
            this.listBox1.Name = "listBox1";
            this.listBox1.Size = new System.Drawing.Size(288, 184);
            this.listBox1.TabIndex = 13;
            // 
            // PacketDisplay
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.listBox1,
                                                                          this.label9,
                                                                          this.label8,
                                                                          this.label7,
                                                                          this.label6,
                                                                          this.protocolLabel,
                                                                          this.dest_portLabel,
                                                                          this.src_portLabel,
                                                                          this.dest_addLabel,
                                                                          this.src_addLabel});
            this.Name = "PacketDisplay";
            this.Text = "PacketDisplay";
            this.Load += new System.EventHandler(this.PacketDisplay_Load);
            this.ResumeLayout(false);

        }
        #endregion

        
    }
}

PacketDisplay.cs

using System;
using System.Net;
using System.Net.Sockets;
using System.Runtime.InteropServices;

namespace SimpleSniff
{
    /**//// <summary>
    /// SniffSocket 的摘要说明?1br/>    /// </summary> 
    [StructLayout(LayoutKind.Explicit)]
    public struct IPHeader
    {
        [FieldOffset(0)] public byte ip_verlen;
        [FieldOffset(1)] public byte ip_tos;
        [FieldOffset(2)] public ushort ip_totallength;
        [FieldOffset(4)] public ushort ip_id;
        [FieldOffset(6)] public ushort ip_offer;
        [FieldOffset(8)] public byte ip_ttl;
        [FieldOffset(9)] public byte ip_protocol;
        [FieldOffset(10)] public ushort ip_checksum;
        [FieldOffset(12)] public uint ip_srcaddr;
        [FieldOffset(16)] public uint ip_destaddr;
    }

    public class SniffSocket
    {
        private bool keepRunning;
        private static int rcv_buf_len;
        private byte[] rcv_but_bytes;
        private Socket socket=null;
        private IAsyncResult ar;
        public SniffSocket()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
            rcv_buf_len=4096;
            rcv_buf_bytes=new byte [rcv_buf_len];
        }
        public bool KeepRunning
        {
            get {return keepRunning;}
            set {keepRunning=value;}
        }
        public void CreateAndBindSocket(string IP)
        {
            socket= new Socket (AddressFamily.InterNetwork ,SocketType.Raw ,ProtocolType.IP );
            socket.Blocking = false;
            socket.Bind (new IPEndPoint (IPAddress.Parse (IP),0));
            SetSocketOption();
        }
        private void SetSocketOption()
        {
            SniffSocketException ex;
            try
            {
                socket.SetSocketOption (SocketOptionLevel.IP ,SocketOptionName.HeaderIncluded ,1);
                byte[] IN=new byte [4]{1,0,0,0};
                byte[] OUT=new byte [4];
                int SIO_RCVALL=unchecked ((int)0x98000001);
                int ret_code=socket.IOControl (SIO_RCVALL,IN,OUT);
                ret_code=OUT[0]+OUT[1]+OUT[2]+OUT[3];
                if (ret_code!=0)
                {
                    ex=new SniffSocketException ("command execute error");
                    throw ex;
                }
            }
            catch (SocketException e)
            {
                ex=new SniffSocketException ("socket error",e);
                throw ex;
            }
        }
        public void ShutDown()
        {
            if (socket!=null)
            {
                socket.Shutdown (SocketShutdown.Both );
            }
        }
        public void Run()
        {
            IAsyncResult ar= socket.BeginReceive (rcv_buf_bytes,0,riv_buf_len,SocketFlags.None ,new AsyncCallback (CallReceive),this);

        }
        private void CallReceive(IAsyncResult ar)
        {
            int received_bytes;
            received_bytes = socket.EndReceive (ar);
            Receive(rcv_but_bytes,received_bytes);
            if (keepRunning) Run();
 
        }
        unsafe private void Receive(byte [] buf, int len)
        {
            byte temp_protocol=0;
            uint temp_version=0;
            uint temp_ip_srcaddr=0;
            uint temp_ip_destaddr=0;
            short temp_srcport=0;
            short temp_detport=0;
            IPAddress temp_ip;
            PacketArrivedEventArgs e=new PacketArrivedEventArgs ();
            fixed (byte *fixed_buf =buf)
            {
                IPHeader * head = (IPHeader *) fixed_buf;
                e.HeaderLength = (uint)(head->ip_verlen & 0x0f) << 2;
                temp_protocol =head->ip_protocol ;
                switch (temp_protocol)
                {
                    case 1: e.Protocol ="ICMP:"; break;
                    case 2: e.Protocol ="IGMP:"; break;
                    case 6: e.Protocol = "TCP:"; break;
                    case 17: e.Protocol ="UDP:"; break;
                    default: e.Protocol ="UNKNOWN"; break;
                }
                temp_version = (uint) (head->ip_verlen & 0xf0) >> 4;
                e.IPVersion = temp_version.ToString ();

                temp_ip_srcaddr = head->ip_srcaddr ;
                temp_ip_destaddr = head->ip_destaddr ;
                temp_ip = new IPAddress (temp_ip_srcaddr);
                e.OriginationAddress =temp_ip.ToString ();
                temp_ip = new IPAddress (temp_ip_destaddr);
                e.DestinationAddress = temp_ip.ToString ();

                temp_srcport = *(short *) & fixed_buf[e.HeaderLength];
                temp_dstport = *(short *) & fixed_buf[e.HeaderLength+2];

                e.OriginationPort=IPAddress.NetworkToHostOrder (temp_srcport).Tostring();
                e.DestinationPort=IPAddress.NetworkToHostOrder (temp_dstport).Tostring();
                
                e.PacketLength =(uint)len;
                e.MessageLength =(uint)len - e.HeaderLength ;

                e.ReceiveBuffer =buf;
                Array.Copy (buf,0,e.IPHeaderBuffer ,0,(int)e.HeaderLength );
                Array.Copy (buf,(int)e.HeaderLength ,e.MessageBuffer ,0,(int)e.MessageLength);
            }
            OnPacketArrival(e);
        }

        public class PacketArrivedEventArgs:EventArgs
        {
            private string protocol;
            private string destination_port;
            private string origination_port;
            private string destination_address;
            private string origination_address;
            private string ip_version;
            private uint total_packet_length;
            private uint message_length;
            private uint header_lenght;
            private byte []receive_buf_bytes = null;
            private byte []ip_header_bytes = null;
            private byte []message_bytes = null;
            public PacketArrivedEventArgs()
            {
                this.protocol = "";
                this.destination_port = "";
                this.origination_port = "";
                this.destination_address = "";
                this.origination_address = "";
                this.ip_version = "";

                this.total_packet_length = 0;
                this.message_length = 0;
                this.header_lenght = 0;

                this.receive_buf_bytes =new byte[rcv_buf_len];
                this.ip_header_bytes =new byte[rcv_buf_len];
                this.message_bytes =new byte[riv_buf_len];
            }
            public string Protocol
            {
                get {return protocol;}
                set {protocol=value;}
            }
            public string DestinationPort
            {
                get {return origination_port;}
                set {destination_port=value;}
            }
            public string OriginationPort
            {
                get {return origination_port;}
                set {origination_port=value;}
            }
            public string DestinationAddress
            {
                get {return destination_address;}
                set {destination_address=value;}
            }
            public string OriginationAddress
            {
                get {return origination_address;}
                set {origination_address=value;}
            }
            public string IPVersion
            {
                get {return ip_version;}
                set {ip_version=value;}
            }
            public uint PacketLength
            {
                get {return total_packet_length;}
                set {total_packet_length=value;}
            }
            public uint MessageLength
            {
                get {return message_length;}
                set {message_lenght=value;}
            }
            public uint HeaderLength
            {
                get {return header_length;}
                set {header_length=value;}
            }
            public byte [] ReceiveBuffer
            {
                get {return receive_buf_bytes;}
                set {receive_buf_bytes=value;}
            }
            public byte [] IPHeaderBuffer
            {
                get {return ip_header_buffer;}
                set {ip_header_buffer=value;}
            }
            public byte [] MessageBuffer
            {
                get {return message_bytes;}
                set {message_bytes=value;}
            }
            public override string ToString()
            {
                return protocol+origination_address + "\t" + destination_address;
            }
        }
        public delegate void PacketArrivedEventHandler(object sender,PacketArrivedEventArgs args);
        public event PacketArrivedEventHandler PacketArrival;

        protected virtual void OnPacketArrival(PacketArrivedEventArgs e)
        {
            if (PacketArrival != null)
            {
                PacketArrival (this, e);

            }
        }

        public class SniffSocketException:Exception
        {
            public SniffSocketException():base()
            {}
            public SniffSocketException(string message):base(message)
            {}
            public SniffSocketException(string message,Exception innerException):base(message,innerException)
            {}
        }
        
    }
}

SniffSocket
下面还有一?1br/>

using System;
using System.Windows.Forms;

namespace SimpleSniff
{
    /**//// <summary>
    /// App 的摘要说明?1br/>    /// </summary>
    public class App
    {    
            //
            // TODO: 在此处添加构造函数逻辑
            //
            [STAThread]
            public static void Main()
            {
                try
                {
                    SniffWindow mainWindow= new SniffWindow();
                    Application.Run (mainWindow);
                }
                catch(Exception ex)
                {
                    MessageBox.Show (ex.ToString ()+"\n\n"+ex.Message ,"ErrorOccured!");
                }
            }
    }
}

这是App.cs

using System.Reflection;
using System.Runtime.CompilerServices;//注意加了这个引用..

//
// 有关程序集的常规信息是通过下列 
//属性集控制的。更改这些属性值可修改与程序集
//关联的信息?1br/>//
[assembly: AssemblyTitle("")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("")]
[assembly: AssemblyCopyright("")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]        

//
// 程序集的版本信息包含下列 4 个值：
//
//      主版?1br/>//      次版?1br/>//      内部版本?1br/>//      修订?1br/>//
// 您可以指定所有值，或使?3#8220;修订?3#8221;?3#8220;内部版本?3#8221;的默认值，方法为按如下方式 
// 使用*?1/SPAN>

[assembly: AssemblyVersion("1.0.*")]

//
// 要对程序集进行签名，必须指定要使用的密钥。有关程序集签名的更多信息，请参?3#160;
// Microsoft .NET 框架文档?1br/>//
// 使用下面的属性控制用于签名的密钥?1br/>//
// 注意?1br/>//   (*) 如果未指定密钥，则程序集不会被签名?1br/>//   (*) KeyName 是指已经安装在计算机上的
//      加密服务提供程序 (CSP) 中的密钥。KeyFile 是指包含
//       密钥的文件?1br/>//   (*) 如果 KeyFile ?3#160;KeyName 值都已指定，?3#160;
//       发生下列处理?1br/>//       (1) 如果?3#160;CSP 中可以找?3#160;KeyName，则使用该密钥?1br/>//       (2) 如果 KeyName 不存在?3#160;KeyFile 存在，则 
//           KeyFile 中的密钥安装?3#160;CSP 中并且使用该密钥?1br/>//   (*) 要创?3#160;KeyFile，可以使?3#160;sn.exe（强名称）实用工具?1br/>//       在指?3#160;KeyFile 时，KeyFile 的位置应该相对于
//       项目输出目录，即
//       %Project Directory%\obj\<configuration>。例如，如果 KeyFile 位于
//       该项目目录，应将 AssemblyKeyFile 
//       属性指定为 [assembly: AssemblyKeyFile("..\\..\\mykey.snk")]
//   (*) 延迟签名是一个高级选项 - 有关它的更多信息，请参阅 Microsoft .NET 框架
//       文档?1br/>//
[assembly: AssemblyDelaySign(false)]
[assembly: AssemblyKeyFile("")]
[assembly: AssemblyKeyName("")]

这是MainForm.csPacketDisplay.csSniffSocket下面还有一?1br/> 这是App.cs