FileShareClient.cs FileShareClient.cs [C#] Robert Wagner /PreviewSnippet.aspx?SnippetID=b4ec41f8-0d9e-420f-8c98-2630f1757da0 SurroundsWith

/// This is the client Form /// public class FileShareClient : System.WinForms.Form { ///

/// Required by the Win Forms designer ///

private System.ComponentModel.Container components; private System.WinForms.StatusBar statusBar1; private System.WinForms.RichTextBox clientlogt; private System.WinForms.Label logl; private System.WinForms.ListBox downlistBox; private System.WinForms.Label downl; private System.WinForms.ListBox uploadlistBox; private System.WinForms.Label uploadl; private System.WinForms.ToolBarButton toolBarButton4; private System.WinForms.ToolBarButton downloadb; private System.WinForms.ToolBarButton toolBarButton3; private System.WinForms.ToolBarButton uploadb; private System.WinForms.ToolBarButton toolBarButton2; private System.WinForms.ToolBarButton dicsob; private System.WinForms.ToolBarButton toolBarButton1; private System.WinForms.ToolBarButton connectb; private System.WinForms.ToolBar toolBar1; private System.WinForms.MainMenu mainMenu1; private int port=4455 ; private Socket clientsocket=null ; private string user ; private string address ; private string updir ; private string dldir ; private clientdialog ctdl ; private Thread clientthread ; private bool connected=false ; private bool locked=false ; private string readwrite ; private File[] upfiles ; ///

/// This is the Constructor ///

public FileShareClient() { // Required for Win Form Designer support InitializeComponent(); } ///

/// Clean up any resources being used ///

public override void Dispose() { if(clientsocket!=null) { SendMessage(clientsocket,"QUIT "+user) ; clientlogt.Text+="Disconnected !!" ; clientsocket=null; } base.Dispose(); components.Dispose(); } ///

/// The main entry point for the application. ///

public static void Main(string[] args) { Application.Run(new FileShareClient()); } ///

/// Required method for Designer support ///

private void InitializeComponent() { this.components = new System.ComponentModel.Container(); this.logl = new System.WinForms.Label(); this.uploadlistBox = new System.WinForms.ListBox(); this.downloadb = new System.WinForms.ToolBarButton(); this.downl = new System.WinForms.Label(); this.uploadb = new System.WinForms.ToolBarButton(); this.statusBar1 = new System.WinForms.StatusBar(); this.downlistBox = new System.WinForms.ListBox(); this.uploadl = new System.WinForms.Label(); this.clientlogt = new System.WinForms.RichTextBox(); this.dicsob = new System.WinForms.ToolBarButton(); this.connectb = new System.WinForms.ToolBarButton(); this.toolBar1 = new System.WinForms.ToolBar(); this.toolBarButton4 = new System.WinForms.ToolBarButton(); this.toolBarButton3 = new System.WinForms.ToolBarButton(); this.toolBarButton2 = new System.WinForms.ToolBarButton(); this.mainMenu1 = new System.WinForms.MainMenu(); this.toolBarButton1 = new System.WinForms.ToolBarButton(); MenuItem FileMenu = new MenuItem("File"); mainMenu1.MenuItems.Add(FileMenu); FileMenu.MenuItems.Add(new MenuItem("Connect", new EventHandler(clientconnect))); FileMenu.MenuItems.Add(new MenuItem("-")); FileMenu.MenuItems.Add(new MenuItem("Disconnect", new EventHandler(clientdisconnect))); FileMenu.MenuItems.Add(new MenuItem("-")); FileMenu.MenuItems.Add(new MenuItem("Exit", new EventHandler(clientexit))); MenuItem TransferMenu = new MenuItem("File Transfer"); mainMenu1.MenuItems.Add(TransferMenu); TransferMenu.MenuItems.Add(new MenuItem("Donwload File", new EventHandler(downfile))) ; TransferMenu.MenuItems.Add(new MenuItem("-")); TransferMenu.MenuItems.Add(new MenuItem("Upload File", new EventHandler(uploadfile))) ; MenuItem ContactMenu = new MenuItem("Contact Me"); mainMenu1.MenuItems.Add(ContactMenu); ContactMenu.MenuItems.Add(new MenuItem("Contact", new EventHandler(contactme))) ; //@design this.TrayHeight = 90; //@design this.TrayLargeIcon = false; //@design this.TrayAutoArrange = true; logl.Location = new System.Drawing.Point(224, 40); logl.Text = "Client Connection Log"; logl.Size = new System.Drawing.Size(151, 16); logl.AutoSize = true; logl.Font = new System.Drawing.Font("Arial", 10f, System.Drawing.FontStyle.Bold); logl.TabIndex = 0; logl.BackColor = System.Drawing.Color.DarkOrange; uploadlistBox.Location = new System.Drawing.Point(8, 64); uploadlistBox.Size = new System.Drawing.Size(200, 139); uploadlistBox.HorizontalScrollbar = true; uploadlistBox.Font = new System.Drawing.Font("Microsoft Sans Serif", 9f, System.Drawing.FontStyle.Bold); uploadlistBox.TabIndex = 5; downloadb.Text = "Download File"; downloadb.ToolTipText = "Click to download selected file from server"; downl.Location = new System.Drawing.Point(8, 216); downl.Text = "Files to Download"; downl.Size = new System.Drawing.Size(122, 16); downl.AutoSize = true; downl.Font = new System.Drawing.Font("Arial", 10f, System.Drawing.FontStyle.Bold); downl.TabIndex = 3; downl.BackColor = System.Drawing.Color.DarkOrange; uploadb.Text = "Upload File"; uploadb.ToolTipText = "Click here to upload the selected file to server"; statusBar1.BackColor = System.Drawing.SystemColors.Control; statusBar1.Location = new System.Drawing.Point(0, 393); statusBar1.Size = new System.Drawing.Size(492, 20); statusBar1.TabIndex = 0; statusBar1.Text = "Ready to Connect"; downlistBox.Location = new System.Drawing.Point(8, 240); downlistBox.Size = new System.Drawing.Size(200, 139); downlistBox.HorizontalScrollbar = true; downlistBox.Font = new System.Drawing.Font("Microsoft Sans Serif", 9f, System.Drawing.FontStyle.Bold); downlistBox.TabIndex = 6; uploadl.Location = new System.Drawing.Point(8, 40); uploadl.Text = "Files to Upload"; uploadl.Size = new System.Drawing.Size(103, 16); uploadl.AutoSize = true; uploadl.Font = new System.Drawing.Font("Arial", 10f, System.Drawing.FontStyle.Bold); uploadl.TabIndex = 0; uploadl.BackColor = System.Drawing.Color.DarkOrange; clientlogt.ReadOnly = true; clientlogt.Size = new System.Drawing.Size(256, 320); clientlogt.ForeColor = System.Drawing.SystemColors.Window; clientlogt.TabIndex = 0; clientlogt.AutoSize = true; clientlogt.Font = new System.Drawing.Font("Microsoft Sans Serif", 9f, System.Drawing.FontStyle.Bold); clientlogt.AcceptsTab = true; clientlogt.TabStop = false; clientlogt.Location = new System.Drawing.Point(224, 64); clientlogt.BackColor = System.Drawing.Color.Orange; dicsob.Text = "Disconnect"; dicsob.Pushed = true; dicsob.ToolTipText = "Click Here to Disconnect from Server"; connectb.Text = "Connect"; connectb.ToolTipText = "Click here to connect to Server"; toolBar1.Size = new System.Drawing.Size(492, 30); toolBar1.BorderStyle = System.WinForms.BorderStyle.Fixed3D; toolBar1.Font = new System.Drawing.Font("Arial", 9f, System.Drawing.FontStyle.Bold); toolBar1.DropDownArrows = true; toolBar1.TabIndex = 1; toolBar1.TabStop = true; toolBar1.ShowToolTips = true; toolBar1.TextAlign = System.WinForms.ToolBarTextAlign.Right; toolBar1.Buttons.All = new System.WinForms.ToolBarButton[] {connectb, toolBarButton1, dicsob, toolBarButton2, uploadb, toolBarButton3, downloadb, toolBarButton4}; toolBar1.ButtonClick+=new ToolBarButtonClickEventHandler(tools) ; toolBarButton4.Style = System.WinForms.ToolBarButtonStyle.Separator; toolBarButton3.Style = System.WinForms.ToolBarButtonStyle.Separator; toolBarButton2.Style = System.WinForms.ToolBarButtonStyle.Separator; //@design mainMenu1.SetLocation(new System.Drawing.Point(7, 7)); toolBarButton1.Style = System.WinForms.ToolBarButtonStyle.Separator; this.Text = "FileShare Client" ; this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.Menu = mainMenu1; this.BackColor = System.Drawing.SystemColors.Desktop; this.ClientSize = new System.Drawing.Size(492, 413); this.Controls.Add(statusBar1); this.Controls.Add(clientlogt); this.Controls.Add(logl); this.Controls.Add(downlistBox); this.Controls.Add(downl); this.Controls.Add(uploadlistBox); this.Controls.Add(uploadl); this.Controls.Add(toolBar1); } ///

/// This method gets called when the user clicks on the connect Menu /// This method shows a Custom Dialog which contains all the /// client settings. /// It then gets the value from the dialog and starts connecting to the /// Speficied Server . ///

private void clientconnect(object sender, EventArgs e) { //Make a instance of our custom Dialog ctdl = new clientdialog() ; //Get the result pressed by the user on the Dialog DialogResult ret = ctdl.ShowDialog(this) ; //If the user pressed 'Ok' then assign the values to //our variables. if(ret == DialogResult.OK) { this.port=int.Parse(ctdl.portt.Text) ; this.address=ctdl.servert.Text ; this.updir = ctdl.fileupt.Text ; this.dldir=ctdl.filedlt.Text ; this.user=ctdl.usert.Text ; if(!Directory.DirectoryExists(dldir)) { MessageBox.Show(this,"The directory to Download Files Does not Exist \n Try Connecting Again"); } else if(!Directory.DirectoryExists(updir)) { MessageBox.Show(this,"The directory to Upload Files Does not Exist \n Try Connecting Again"); } else { //clear the log screen clientlogt.Text=""; //set the buttons dicsob.Pushed=false ; connectb.Pushed=true ; statusBar1.Text="Connecting to Server... "; //to get the Upload and Download directories //call the Method which gets the files and updates //them in our ListBoxes GetDirs(); //Call the method which will connect to the //server. InitilizeConn(); } } } ///

/// This method is called when the client clicks the /// Disconnect menuitem. It closes the connection to the server /// and resets the buttons and listboxes. ///

private void clientdisconnect(object sender, EventArgs e) { //If a socket connection Exisis then close it if(clientsocket!=null) { SendMessage(clientsocket, "QUIT "+user) ; clientsocket.Close(); } //Abort the client thread if(clientthread!=null&&clientthread.IsAlive) { clientthread.Abort(); } //reset the Buttons statusBar1.Text="Disconnected!!!"; clientlogt.Text+="Disconnected !!" ; downlistBox.Items.Clear(); dicsob.Pushed=true; downloadb.Pushed=false ; uploadb.Pushed=false ; connectb.Pushed=false ; } ///

/// This method is called when the user clicks the Exit Menuitem. /// It calls the Dispose() method to exit the program ///

private void clientexit(object sender, EventArgs e) { Dispose(); } ///

/// This is the method called when the user clicks the /// Download Menuitem. /// It has the code to Download the selected file from the server ///

private void downfile(object sender, EventArgs e) { //check for connection and if some other download or //upload process is already going on. if(connected && !locked) { //Get the File selected for download if(downlistBox.SelectedItem==null) { MessageBox.Show(this,"Please Select a file to download first and then click download") ; } else { //Get the File Selected for doenload from the ListBox string selefile =(string)downlistBox.SelectedItem ; //Send the Server "DOWN" command with the FileName to download //from the server SendMessage(clientsocket ,"DOWN "+selefile) ; //set a global variable with the Filename readwrite=selefile ; clientlogt.Text+="Sending Download Request to server for file "+selefile+"\n" ; clientthread=null ; downloadb.Pushed=true ; uploadb.Pushed=true ; //Set the buttons and start the Downloading method "DownloadFile" in a //Thread Thread downthread = new Thread(new ThreadStart(DownloadFile)) ; downthread.Start() ; } } } ///

/// This method gets called when the user clicks on the Upload MenuItem /// It takes care of all the Upload procedure ///

private void uploadfile(object sender, EventArgs e) { //Check if connection is present and if any other upload //or download process is going on. if(connected && !locked) { //Get the File Selected for upload from the ListBox if(uploadlistBox.SelectedItem==null) { MessageBox.Show(this,"Please Select a file to upload first and then click Upload") ; } else { try{ string selefile =uploadlistBox.SelectedItem.ToString() ; File ftemp = new File(selefile) ; //Construct a string to send to the server with the Command "UPFL" //With the Command the client also sends the FileName and the //File Length string ttt = "UPFL "+ftemp.FullName+"@"+ftemp.Length.ToString() ; //Send the message SendMessage(clientsocket ,ttt) ; //Set a global variable for the Selected file readwrite=selefile ; //Do some buttons and Log settings clientlogt.Text+="Sending Upload Request to server for file "+selefile+"\n" ; downloadb.Pushed=true ; uploadb.Pushed=true ; //Start a thread on the Method "UploadFile" Thread upthread = new Thread(new ThreadStart(UploadFile)) ; upthread.Start() ; } catch(Exception eg) { MessageBox.Show(this,"Exception occured in upload click "+eg.ToString()); downloadb.Pushed=false ; uploadb.Pushed=false ; } } } } ///

/// Method called when the Help MenuItem is clicked ///

private void contactme(object sender, EventArgs e) { MessageBox.Show(this,"This is the FileShare Client") ; } ///

/// This method is the event handler for the the ToolBar buttons. /// The code here is the same repeat of the Above "Connect", "Disconnect" /// ,"Download" and "Upload" MenuItem Methods ///

private void tools(object sender, ToolBarButtonClickEventArgs e) { if(e.button==connectb) { ctdl = new clientdialog() ; DialogResult ret = ctdl.ShowDialog(this) ; if(ret == DialogResult.OK) { this.port=int.Parse(ctdl.portt.Text) ; this.address=ctdl.servert.Text ; this.updir = ctdl.fileupt.Text ; this.dldir=ctdl.filedlt.Text ; this.user=ctdl.usert.Text ; if(!Directory.DirectoryExists(dldir)) { MessageBox.Show(this,"The directory to Download Files Does not Exist \n Try Connecting Again"); } else if(!Directory.DirectoryExists(updir)) { MessageBox.Show(this,"The directory to Upload Files Does not Exist \n Try Connecting Again"); } else { clientlogt.Text=""; dicsob.Pushed=false ; connectb.Pushed=true ; statusBar1.Text="Connecting To Server ..."; GetDirs(); InitilizeConn(); } } } else if(e.button==dicsob) { if(clientsocket!=null) { SendMessage(clientsocket, "QUIT "+user) ; clientsocket.Close(); } if(clientthread!=null&&clientthread.IsAlive) { clientthread.Abort(); } statusBar1.Text="Disconnected!!"; clientlogt.Text+="Disconnected !!"; downlistBox.Items.Clear(); connectb.Pushed=false ; downloadb.Pushed=false ; uploadb.Pushed=false ; dicsob.Pushed=true; } else if(e.button==uploadb) { if(connected && !locked) { if(uploadlistBox.SelectedItem==null) { MessageBox.Show(this,"Please Select a file to upload first and then click Upload") ; } else { string selefile =uploadlistBox.SelectedItem.ToString() ; File ftemp = new File(selefile) ; SendMessage(clientsocket ,"UPFL "+ftemp.FullName+"@"+ftemp.Length) ; readwrite=selefile ; clientlogt.Text+="Sending Upload Request to server for file "+selefile+"\n" ; downloadb.Pushed=true ; uploadb.Pushed=true ; Thread upthread = new Thread(new ThreadStart(UploadFile)) ; upthread.Start() ; } } } else if(e.button==downloadb) { if(connected && !locked) { if(downlistBox.SelectedItem==null) { MessageBox.Show(this,"Please Select a file to download first and then click download") ; } else { string selefile =(string)downlistBox.SelectedItem ; SendMessage(clientsocket ,"DOWN "+selefile) ; readwrite=selefile ; clientlogt.Text+="Sending Download Request to server for file "+selefile+"\n" ; downloadb.Pushed=true ; uploadb.Pushed=true ; Thread downthread = new Thread(new ThreadStart(DownloadFile)) ; downthread.Start() ; } } } } ///

/// This method Will connect to the Server using the settings /// specified by the client properties dialog. ///

public void InitilizeConn() { try { //Initilize a socket of the Typr TCP clientsocket = new Socket(AddressFamily.AfINet,SocketType.SockStream,ProtocolType.ProtTCP); clientlogt.Text+="Trying to connect to Server ......\r" ; //Resolve the DNS of the server IPAddress host_addr = DNS.Resolve(address); //Create a IPEndPoint to the Server IPEndPoint ep = new IPEndPoint(host_addr, port); //Check if the client could connect to the Server //If the client is connected Zero is returned if(clientsocket.Connect(ep)==0) { //Start a Thread on the Method "doTalk" whic will handle //futher talking with the server statusBar1.Text="Connected !!"; clientlogt.Text+="Connected to Server: "+ep.ToString()+" \r" ; clientthread = new Thread(new ThreadStart(doTalk)) ; clientthread.Start() ; } else { //Else there was a error Connecting dicsob.Pushed=true; downloadb.Pushed=false ; uploadb.Pushed=false ; connectb.Pushed=false ; statusBar1.Text="Error" ; clientlogt.Text="Error: Cannot Connect to Server !!"; } } catch(Exception ed) { dicsob.Pushed=true; downloadb.Pushed=false ; uploadb.Pushed=false ; connectb.Pushed=false ; statusBar1.Text="Error" ; Console.WriteLine("Exception occured in Connecting to Server :"+ed.ToString()) ; } } ///

/// A Method which will resolve the Files in the Upload and /// download directory and add it to the ListBox ///

private void GetDirs() { //check the dirctory if(Directory.DirectoryExists(updir)) { //Make a global variable containing all the files in the Upload Directory upfiles = Directory.GetFilesInDirectory(updir) ; //add the files to the ListBox foreach (File f in upfiles) { uploadlistBox.InsertItem(0,f); } } } ///

/// This Method runs in a Thread called from the InitilizeConn method. /// This method does the Sending and receiving of normal commands with the server ///

private void doTalk() { //Bool variable to indicate if initial talk between the Client //and server is going on bool StayConnected=true ; while(StayConnected) { string ServerCommand ; //Declare a Byte receive buffer byte[] recs = new byte[2048]; try{ //Receive Bytes from the Server int scount = clientsocket.Receive(recs , recs.Length,0) ; //Decode the Server Message to String string servermessage = System.Text.Encoding.ASCII.GetString(recs) ; //check if the server sent more than one Byte if(scount >0) { //Call a method ParseMessage with the Server Message as a Parameter // This Method will extract the Server Comand from the Server Message ServerCommand = ParseMessage(servermessage) ; } else { //If no message is received then assume a custom Command ServerCommand="NOOP" ; } //Call a method ParseComand with parameters as the Server Command and the Server Message //This method does action depending on the server command //It returns a Bool value depending on the server Command StayConnected = ParseCommand(ServerCommand , servermessage) ; } catch(Exception ec) { statusBar1.Text="Error!!" ; StayConnected = false ; MessageBox.Show(this,"Exception Occured while Talking to Server :"+ec.ToString()) ; } } } ///

/// This Method is Used to send Messages to the Server using the /// Socket connection ///

private void SendMessage(Socket sendsock , string message) { //Fill up a Byte array with the Command to send to the server encoded //in ASCII format byte[] sender = System.Text.Encoding.ASCII.GetBytes(message.ToCharArray()) ; //Send the Message sendsock.Send(sender, sender.Length,0) ; } ///

/// This method takes Server Message as a Parameter and /// send back the server command from the message ///

private string ParseMessage(string clientlogt) { string ServerCommand ; if(clientlogt=="") { return "NOOP" ; } //The Command Length is 4 so we substring the first 4 //Bytes from the Message ServerCommand = clientlogt.Substring(0,4) ; return ServerCommand ; } ///

/// This message Get the Server Command and Server Message as Parameters /// It Then Takes Care of all Executing to be done depending on the Server Command ///

private bool ParseCommand(string ServerCommand , string servermessage ) { if(ServerCommand=="CONN") { //This is the First Message Sent by the server upon //receiving the Client Connection request string temp = servermessage.Substring(4) ; string mes= temp.Trim() ; clientlogt.Text+="Server :"+mes+" \r"; //In response to this Command we Reply with the "USER" Command //along with it We send our Username to the Server SendMessage(clientsocket,"USER "+user) ; connected=true ; return true ; } if(ServerCommand=="NOOP") { //A command to do Nothing Thread.Sleep(100); return true ; } if(ServerCommand=="LIST") { //This Command is sent by the server along wiht a list of all the files it is //offering for download //Individual FileNames are Seperated by a "@" sign string temp = servermessage.Substring(6) ; string mes= temp.Trim() ; string[] temp2= mes.Split(new char[]{'@'}) ; //Breakup the Server string and Fillup the ListBox with the //FileName only of the Files available for download foreach(string s in temp2) { int i = s.LastIndexOf("\\") ; downlistBox.InsertItem(0,s.Substring(i+1)) ; } return false ; } if(ServerCommand=="RECD") { //This command is sent by the Server to Indicate that it has //Received the Uploaded file return true ; } //If some other command is sent the return False return false ; } ///

/// This method takes care of download the file from the Server ///

private void DownloadFile() { //Declare some variable that will be used later bool done =false ; bool check= false ; locked=true ; long size=0 ; long rby=0 ; while(!done) { //declare a buffer byte[] rce = new byte[2048] ; //Recive a Sever Message int i = clientsocket.Receive(rce,rce.Length,0) ; //Convert it to string string servermessage = System.Text.Encoding.ASCII.GetString(rce); if(i>0) { //Parse the Message to get the Server Command string command = ParseMessage(servermessage); //Check if the command is SIZE //this command is sent along with the Size of the File //Which the client Requested for download if(command=="SIZE") { string temp = servermessage.Substring(4) ; string mes= temp.Trim() ; //store the File Size size=Int64.Parse(mes) ; clientlogt.Text+="Receiving File of "+size+" bytes \n"; //Send a "SEND" command to the server which will //make the server send the File SendMessage(clientsocket , "SEND "+readwrite ); done=true ; check=true ; } if(command=="NOPE") { //a "NOPE" command is returned when the File asked if not availabe or //if server has restricted downloads string temp = servermessage.Substring(4) ; string mes= temp.Trim() ; clientlogt.Text+="File Receive Error "+mes+" \n" ; downloadb.Pushed=false ; uploadb.Pushed=false ; done=true ; //We send a "OHHH" command in response SendMessage(clientsocket ,"OHHH No Problem") ; check=false ; } } } //The File Size has been received the continue done=false ; //Make a File with the same name as the File that is being downloaded //Also open a Network Stream to the Server FileStream fout = new FileStream(dldir+readwrite, FileMode.OpenOrCreate , FileAccess.Write) ; NetworkStream nfs = new NetworkStream(clientsocket) ; byte[] buffer = new byte[4096] ; statusBar1.Text="Downloading File from Server..." ; while(!done&&check) { try{ long v=0 ; //loop till the Full bytes have been read while(rby0) { //Some checking done to detremine the number of Bytes to be written if(i>=4096&&(size-rby)>=4096) { v=4096 ; } else if(i<4096 &&(size-rby)>=4096) { v= i; } else { v=(size-rby) ; } //Write the Bytes received to the File fout.Write(buffer,0,(int)v) ; rby=rby+v ; } } clientlogt.Text+="File Received sucessfully "+rby+"bytes \n"; //Send a "RECD" Command to the Server in response statusBar1.Text="File Downloaded" ; SendMessage(clientsocket,"RECD File!!") ; downloadb.Pushed=false ; uploadb.Pushed=false ; fout.Close() ; done=true ; locked=false ; } catch(Exception ed) { statusBar1.Text="Error!!" ; MessageBox.Show(this,"A Exception occured in file transfer"+ed.ToString()); } } } ///

/// This method taks care of Uploading the Selected File to the Server ///

private void UploadFile() { //Set some Variables bool check =true ; locked=true ; bool done =false ; int i=0 ; long rdby=0 ; File ftemp = new File(readwrite) ; long total = ftemp.Length ; ftemp=null ; byte[] rce = new byte[2048] ; string servermessage ; while(!done) { //Receive Bytes from the Server i = clientsocket.Receive(rce,rce.Length,0) ; servermessage = System.Text.Encoding.ASCII.GetString(rce); if(i>0) { //Parse the Server Message to get the Command string command = ParseMessage(servermessage); if(command=="SEND") { //Server Sends a "SEND" command if it allows the client to upload files string temp = servermessage.Substring(4) ; string mes= temp.Trim() ; clientlogt.Text+="Server Ready to Accept File \n"; done=true ; check=true ; } if(command=="NOPE") { //A "NOPE" Command is sent if the Server does not allow Uploading string temp = servermessage.Substring(4) ; string mes= temp.Trim() ; clientlogt.Text+="File Send Error "+mes+" \n" ; downloadb.Pushed=false ; uploadb.Pushed=false ; done=true ; //Send a Response to the Server SendMessage(clientsocket ,"OHHH No Problem") ; check=false ; } } } //If the Server has Requested to Send the file then open up the //FileStreams to the file to be Uploaded statusBar1.Text="Uploading File to Server" ; i=0; FileStream fin = new FileStream(readwrite , FileMode.Open , FileAccess.Read) ; byte[] reader = new byte[4096] ; //Loop till the File is totaly read while(rdby0) { string command = ParseMessage(servermessage); if(command=="RECD") { //Server Sends a "RECD" Command if the file was receive sucessfully statusBar1.Text="File Uploaded" ; string temp = servermessage.Substring(4) ; string mes= temp.Trim() ; Console.WriteLine("Server Received File :"+mes) ; downloadb.Pushed=false ; uploadb.Pushed=false ; clientlogt.Text+="Server Received File \n"; locked=false ; done=true ; } } } } }//client class ///

/// This is a Class which will be our Client Dialog Class ///

public class clientdialog : System.WinForms.Form { ///

/// Required by the Win Forms designer ///

private System.ComponentModel.Container components; private System.WinForms.ToolTip toolTip1; private System.WinForms.Button defaultb; public System.WinForms.TextBox filedlt; private System.WinForms.Label fdll; public System.WinForms.TextBox usert; private System.WinForms.Label userl; public System.WinForms.TextBox servert; private System.WinForms.Label serverl; private System.WinForms.Button cancelb; private System.WinForms.Button okb; public System.WinForms.TextBox fileupt; private System.WinForms.Label fupl; public System.WinForms.TextBox portt; private System.WinForms.Label portl; private System.WinForms.Label lb1; ///

/// Constructor of the Class ///

public clientdialog() { // Required for Win Form Designer support InitializeComponent(); } ///

/// Clean up any resources being used ///

public override void Dispose() { base.Dispose(); components.Dispose(); } ///

/// Required method for Designer support - do not modify /// the contents of this method with an editor ///

private void InitializeComponent() { this.components = new System.ComponentModel.Container(); this.servert = new System.WinForms.TextBox(); this.fupl = new System.WinForms.Label(); ]]>