essayez de créer un WebSocket qui contrôle l’impression côté client et envoie les données avec ajax de la page à localhost.\n/// websocket\nen utilisant le système;\nusing System.Net;\nusing System.Net.WebSockets;\nusing System.Text;\nusing System.Threading;
"},{"id":"text-2","type":"text","heading":"","plain_text":"Serveur d'espace de noms\n{\n programme de classe\n \n WebsocketServer statique public ws;\n static void Main (chaîne[] args)\n \n ws = new Server.WebsocketServer ();\n ws.LogMessage + = Ws_LogMessage;\n ws.Start ("http: // localhost: 2645 / service /");\n Console.WriteLine ("Appuyez sur n'importe quelle touche pour quitter ...");\n Console.ReadKey ();\n ","html":"Serveur d'espace de noms\n{\n programme de classe\n \n WebsocketServer statique public ws;\n static void Main (chaîne[] args)\n \n ws = new Server.WebsocketServer ();\n ws.LogMessage + = Ws_LogMessage;\n ws.Start ("http: // localhost: 2645 / service /");\n Console.WriteLine ("Appuyez sur n'importe quelle touche pour quitter ...");\n Console.ReadKey ();\n
"},{"id":"text-3","type":"text","heading":"","plain_text":" void statique privé Ws_LogMessage (expéditeur de l'objet, WebsocketServer.LogMessageEventArgs e)\n \n Console.WriteLine (e.Message);\n \n ","html":"void statique privé Ws_LogMessage (expéditeur de l'objet, WebsocketServer.LogMessageEventArgs e)\n \n Console.WriteLine (e.Message);\n \n
"},{"id":"text-4","type":"text","heading":"","plain_text":" classe publique WebsocketServer\n {\n événement public OnLogMessage LogMessage;\n délégué public void OnLogMessage (Expéditeur d'objet, LogMessageEventArgs e);\n Classe publique LogMessageEventArgs: EventArgs\n \n chaîne publique Message get; ensemble; \n public LogMessageEventArgs (chaîne Message)\n \n this.Message = Message;\n \n ","html":"classe publique WebsocketServer\n {\n événement public OnLogMessage LogMessage;\n délégué public void OnLogMessage (Expéditeur d'objet, LogMessageEventArgs e);\n Classe publique LogMessageEventArgs: EventArgs\n \n chaîne publique Message get; ensemble; \n public LogMessageEventArgs (chaîne Message)\n \n this.Message = Message;\n \n
"},{"id":"text-5","type":"text","heading":"","plain_text":" bool public started = false;\n public async void Start (chaîne httpListenerPrefix)\n \n HttpListener httpListener = new HttpListener ();\n httpListener.Prefixes.Add (httpListenerPrefix);\n httpListener.Start ();\n LogMessage (this, new LogMessageEventArgs ("Listening ..."));\n commencé = vrai;","html":"bool public started = false;\n public async void Start (chaîne httpListenerPrefix)\n \n HttpListener httpListener = new HttpListener ();\n httpListener.Prefixes.Add (httpListenerPrefix);\n httpListener.Start ();\n LogMessage (this, new LogMessageEventArgs ("Listening ..."));\n commencé = vrai;
"},{"id":"text-6","type":"text","heading":"","plain_text":" alors que (commencé)\n \n HttpListenerContext httpListenerContext = wait httpListener.GetContextAsync ();\n if (httpListenerContext.Request.IsWebSocketRequest)\n \n ProcessRequest (httpListenerContext);\n \n autre\n \n httpListenerContext.Response.StatusCode = 400;\n httpListenerContext.Response.Close ();\n LogMessage (this, new LogMessageEventArgs ("Closed ..."));\n \n \n ","html":"alors que (commencé)\n \n HttpListenerContext httpListenerContext = wait httpListener.GetContextAsync ();\n if (httpListenerContext.Request.IsWebSocketRequest)\n \n ProcessRequest (httpListenerContext);\n \n autre\n \n httpListenerContext.Response.StatusCode = 400;\n httpListenerContext.Response.Close ();\n LogMessage (this, new LogMessageEventArgs ("Closed ..."));\n \n \n
"},{"id":"text-7","type":"text","heading":"","plain_text":" public void Stop ()\n \n commencé = faux;\n \n ProcessRequest (HttpListenerContext httpListenerContext)\n {\n WebSocketContext webSocketContext = null;","html":"public void Stop ()\n \n commencé = faux;\n \n ProcessRequest (HttpListenerContext httpListenerContext)\n {\n WebSocketContext webSocketContext = null;
"},{"id":"text-8","type":"text","heading":"","plain_text":" essayer\n \n webSocketContext = wait httpListenerContext.AcceptWebSocketAsync (subProtocol: null);\n LogMessage (this, nouveau LogMessageEventArgs ("Connecté"));\n \n catch (Exception e)\n \n httpListenerContext.Response.StatusCode = 500;\n httpListenerContext.Response.Close ();\n LogMessage (this, new LogMessageEventArgs (String.Format ("Exception: 0", e)));\n revenir;\n ","html":"essayer\n \n webSocketContext = wait httpListenerContext.AcceptWebSocketAsync (subProtocol: null);\n LogMessage (this, nouveau LogMessageEventArgs ("Connecté"));\n \n catch (Exception e)\n \n httpListenerContext.Response.StatusCode = 500;\n httpListenerContext.Response.Close ();\n LogMessage (this, new LogMessageEventArgs (String.Format ("Exception: 0", e)));\n revenir;\n
"},{"id":"text-9","type":"text","heading":"","plain_text":" WebSocket webSocket = webSocketContext.WebSocket;\n essayer\n {","html":"WebSocket webSocket = webSocketContext.WebSocket;\n essayer\n {
"},{"id":"text-10","type":"text","heading":"","plain_text":" while (webSocket.State == WebSocketState.Open)\n {","html":"while (webSocket.State == WebSocketState.Open)\n {
"},{"id":"text-11","type":"text","heading":"","plain_text":" ArraySegment buffer = new ArraySegment(nouvel octet[8192])","html":"ArraySegment buffer = new ArraySegment(nouvel octet[8192])
"},{"id":"text-12","type":"text","heading":"","plain_text":" WebSocketReceiveResult resultat = null;","html":"WebSocketReceiveResult resultat = null;
"},{"id":"text-13","type":"text","heading":"","plain_text":" using (var ms = new System.IO.MemoryStream ())\n {\n faire\n \n result = wait webSocket.ReceiveAsync (tampon, CancellationToken.None);\n ms.Write (buffer.Array, buffer.Offset, result.Count);\n \n while (! result.EndOfMessage);","html":"using (var ms = new System.IO.MemoryStream ())\n {\n faire\n \n result = wait webSocket.ReceiveAsync (tampon, CancellationToken.None);\n ms.Write (buffer.Array, buffer.Offset, result.Count);\n \n while (! result.EndOfMessage);
"},{"id":"text-14","type":"text","heading":"","plain_text":" ms.Seek (0, System.IO.SeekOrigin.Begin);","html":"ms.Seek (0, System.IO.SeekOrigin.Begin);
"},{"id":"text-15","type":"text","heading":"","plain_text":" if (result.MessageType == WebSocketMessageType.Text)\n {\n using (var reader = new System.IO.StreamReader (ms, Encoding.UTF8))\n \n var r = System.Text.Encoding.UTF8.GetString (ms.ToArray ());\n var t = Newtonsoft.Json.JsonConvert.DeserializeObject(r);\n bool valid = true;\n octet[] toBytes = Encoding.UTF8.GetBytes (""); ;","html":"if (result.MessageType == WebSocketMessageType.Text)\n {\n using (var reader = new System.IO.StreamReader (ms, Encoding.UTF8))\n \n var r = System.Text.Encoding.UTF8.GetString (ms.ToArray ());\n var t = Newtonsoft.Json.JsonConvert.DeserializeObject(r);\n bool valid = true;\n octet[] toBytes = Encoding.UTF8.GetBytes (""); ;
"},{"id":"text-16","type":"text","heading":"","plain_text":" si (t! = null)\n \n if (t.printer.Trim () == string.Empty)\n \n var imprimantes = "";\n foreach (var imp dans System.Drawing.Printing.PrinterSettings.InstalledPrinters)\n \n imprimantes + = imp + " n";\n ","html":"si (t! = null)\n \n if (t.printer.Trim () == string.Empty)\n \n var imprimantes = "";\n foreach (var imp dans System.Drawing.Printing.PrinterSettings.InstalledPrinters)\n \n imprimantes + = imp + " n";\n
"},{"id":"text-17","type":"text","heading":"","plain_text":" toBytes = Encoding.UTF8.GetBytes ("Aucune indication sur l'impression nLas Impresoras disponibles:" + imprimantes);\n valide = faux;\n \n if (t.name.Trim () == string.Empty)\n \n toBytes = Encoding.UTF8.GetBytes ("Aucune indication sur le document");\n valide = faux;\n \n if (t.code == null)\n \n toBytes = Encoding.UTF8.GetBytes ("Aucune donnée n'est affichée à la suite de l'impression");\n valide = faux;\n ","html":"toBytes = Encoding.UTF8.GetBytes ("Aucune indication sur l'impression nLas Impresoras disponibles:" + imprimantes);\n valide = faux;\n \n if (t.name.Trim () == string.Empty)\n \n toBytes = Encoding.UTF8.GetBytes ("Aucune indication sur le document");\n valide = faux;\n \n if (t.code == null)\n \n toBytes = Encoding.UTF8.GetBytes ("Aucune donnée n'est affichée à la suite de l'impression");\n valide = faux;\n
"},{"id":"text-18","type":"text","heading":"","plain_text":" si (valide)\n \n print.RawPrinter.SendStringToPrinter (t.printer, t.code, t.name);\n toBytes = Encoding.UTF8.GetBytes ("Correcto ...");\n ","html":"si (valide)\n \n print.RawPrinter.SendStringToPrinter (t.printer, t.code, t.name);\n toBytes = Encoding.UTF8.GetBytes ("Correcto ...");\n
"},{"id":"text-19","type":"text","heading":"","plain_text":" attendez webSocket.SendAsync (nouvel ArraySegment(toBytes, 0, int.Parse (toBytes.Length.ToString ())), WebSocketMessageType.Binary, result.EndOfMessage, CancellationToken.None);\n \n autre\n \n toBytes = Encoding.UTF8.GetBytes ("Erreur ...");\n attendez webSocket.SendAsync (nouvel ArraySegment(toBytes, 0, int.Parse (toBytes.Length.ToString ())), WebSocketMessageType.Binary, result.EndOfMessage, CancellationToken.None);\n \n \n }\n }\n }\n }\n catch (Exception e)\n \n LogMessage (this, new LogMessageEventArgs (String.Format ("Exception: 0 nLinea: 1", e, e.StackTrace))));\n \n enfin\n \n si (webSocket! = null)\n webSocket.Dispose ();\n \n }\n }","html":"attendez webSocket.SendAsync (nouvel ArraySegment(toBytes, 0, int.Parse (toBytes.Length.ToString ())), WebSocketMessageType.Binary, result.EndOfMessage, CancellationToken.None);\n \n autre\n \n toBytes = Encoding.UTF8.GetBytes ("Erreur ...");\n attendez webSocket.SendAsync (nouvel ArraySegment(toBytes, 0, int.Parse (toBytes.Length.ToString ())), WebSocketMessageType.Binary, result.EndOfMessage, CancellationToken.None);\n \n \n }\n }\n }\n }\n catch (Exception e)\n \n LogMessage (this, new LogMessageEventArgs (String.Format ("Exception: 0 nLinea: 1", e, e.StackTrace))));\n \n enfin\n \n si (webSocket! = null)\n webSocket.Dispose ();\n \n }\n }
"},{"id":"text-20","type":"text","heading":"","plain_text":" classe publique Datos\n \n nom de chaîne publique get; ensemble; \n code de chaîne publique get; ensemble; \n chaîne publique imprimante get; ensemble; = "";\n \n}","html":"classe publique Datos\n \n nom de chaîne publique get; ensemble; \n code de chaîne publique get; ensemble; \n chaîne publique imprimante get; ensemble; = "";\n \n}
"},{"id":"text-21","type":"text","heading":"","plain_text":"impression brute:\nusing Microsoft.VisualBasic;\nen utilisant le système;\nusing System.Collections;\nusing System.Collections.Generic;\nusing System.Data;\nusing System.Diagnostics;\nusing System.Runtime.InteropServices;\nusing System.IO;","html":"impression brute:\nusing Microsoft.VisualBasic;\nen utilisant le système;\nusing System.Collections;\nusing System.Collections.Generic;\nusing System.Data;\nusing System.Diagnostics;\nusing System.Runtime.InteropServices;\nusing System.IO;
"},{"id":"text-22","type":"text","heading":"","plain_text":"print de l'espace de noms\n{\n Classe publique RawPrinter\n {\n // Déclarations de structure et d'API:\n [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]\n classe publique DOCINFOA\n \n [MarshalAs(UnmanagedType.LPStr)]\n chaîne publique pDocName;\n [MarshalAs(UnmanagedType.LPStr)]\n chaîne publique pOutputFile;\n [MarshalAs(UnmanagedType.LPStr)]\n chaîne publique pDataType;\n \n [DllImport(\"winspool.Drv\", EntryPoint = \"OpenPrinterA\", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique extern bool OpenPrinter ([MarshalAs(UnmanagedType.LPStr)]\nchaîne szPrinter, réf IntPtr hPriknter, IntPtr pd);","html":"print de l'espace de noms\n{\n Classe publique RawPrinter\n {\n // Déclarations de structure et d'API:\n [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]\n classe publique DOCINFOA\n \n [MarshalAs(UnmanagedType.LPStr)]\n chaîne publique pDocName;\n [MarshalAs(UnmanagedType.LPStr)]\n chaîne publique pOutputFile;\n [MarshalAs(UnmanagedType.LPStr)]\n chaîne publique pDataType;\n \n [DllImport("winspool.Drv", EntryPoint = "OpenPrinterA", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique extern bool OpenPrinter ([MarshalAs(UnmanagedType.LPStr)]\nchaîne szPrinter, réf IntPtr hPriknter, IntPtr pd);
"},{"id":"text-23","type":"text","heading":"","plain_text":"[DllImport(\"winspool.Drv\", EntryPoint = \"ClosePrinter\", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public extern externe bool ClosePrinter (IntPtr hPrinter);","html":"[DllImport("winspool.Drv", EntryPoint = "ClosePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public extern externe bool ClosePrinter (IntPtr hPrinter);
"},{"id":"text-24","type":"text","heading":"","plain_text":"[DllImport(\"winspool.Drv\", EntryPoint = \"StartDocPrinterA\", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique externe bool StartDocPrinter (IntPtr hPrinter, niveau Int32, [In(), MarshalAs(UnmanagedType.LPStruct)]\nDOCINFOA di);","html":"[DllImport("winspool.Drv", EntryPoint = "StartDocPrinterA", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique externe bool StartDocPrinter (IntPtr hPrinter, niveau Int32, [In(), MarshalAs(UnmanagedType.LPStruct)]\nDOCINFOA di);
"},{"id":"text-25","type":"text","heading":"","plain_text":"[DllImport(\"winspool.Drv\", EntryPoint = \"EndDocPrinter\", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public extern externe bool EndDocPrinter (IntPtr hPrinter);","html":"[DllImport("winspool.Drv", EntryPoint = "EndDocPrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public extern externe bool EndDocPrinter (IntPtr hPrinter);
"},{"id":"text-26","type":"text","heading":"","plain_text":"[DllImport(\"winspool.Drv\", EntryPoint = \"StartPagePrinter\", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique extern bool StartPagePrinter (IntPtr hPrinter);","html":"[DllImport("winspool.Drv", EntryPoint = "StartPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique extern bool StartPagePrinter (IntPtr hPrinter);
"},{"id":"text-27","type":"text","heading":"","plain_text":"[DllImport(\"winspool.Drv\", EntryPoint = \"EndPagePrinter\", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique extern bool EndPagePrinter (IntPtr hPrinter);","html":"[DllImport("winspool.Drv", EntryPoint = "EndPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique extern bool EndPagePrinter (IntPtr hPrinter);
"},{"id":"text-28","type":"text","heading":"","plain_text":"[DllImport(\"winspool.Drv\", EntryPoint = \"WritePrinter\", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique externe bool WritePrinter (IntPtr hPrinter, IntPtr pBytes, Int32 dwCount, ref Int32 dwWritten);","html":"[DllImport("winspool.Drv", EntryPoint = "WritePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique externe bool WritePrinter (IntPtr hPrinter, IntPtr pBytes, Int32 dwCount, ref Int32 dwWritten);
"},{"id":"text-29","type":"text","heading":"","plain_text":" // SendBytesToPrinter ()\n // Lorsque la fonction reçoit un nom d'imprimante et un tableau non géré\n // d'octets, la fonction envoie ces octets à la file d'attente d'impression.\n // Renvoie true en cas de succès, false en cas d'échec.\n public bool statique SendBytesToPrinter (chaîne szPrinterName, pbits IntPtr, dwCount Int32, chaîne DocName = "")\n \n Int32 dwError = 0;\n Int32 dwWritten = 0;\n IntPtr hPrinter = new IntPtr (0);\n DOCINFOA di = new DOCINFOA ();\n bool bSuccess = false;\n // Suppose l'échec sauf si vous y parvenez.\n di.pDocName = string.IsNullOrEmpty (DocName)? "Mon document RAW C # .NET": DocName;\n di.pDataType = "RAW";","html":"// SendBytesToPrinter ()\n // Lorsque la fonction reçoit un nom d'imprimante et un tableau non géré\n // d'octets, la fonction envoie ces octets à la file d'attente d'impression.\n // Renvoie true en cas de succès, false en cas d'échec.\n public bool statique SendBytesToPrinter (chaîne szPrinterName, pbits IntPtr, dwCount Int32, chaîne DocName = "")\n \n Int32 dwError = 0;\n Int32 dwWritten = 0;\n IntPtr hPrinter = new IntPtr (0);\n DOCINFOA di = new DOCINFOA ();\n bool bSuccess = false;\n // Suppose l'échec sauf si vous y parvenez.\n di.pDocName = string.IsNullOrEmpty (DocName)? "Mon document RAW C # .NET": DocName;\n di.pDataType = "RAW";
"},{"id":"text-30","type":"text","heading":"","plain_text":" // Ouvre l'imprimante.\n if (OpenPrinter (szPrinterName.Normalize (), réf hPrinter, IntPtr.Zero))\n \n // Démarrer un document.\n if (StartDocPrinter (hPrinter, 1, di))\n \n // Démarrer une page.\n if (StartPagePrinter (hPrinter))\n \n // Ecrivez vos octets.\n bSuccess = WritePrinter (hPrinter, pBytes, dwCount, ref dwWritten);\n EndPagePrinter (hPrinter);\n \n EndDocPrinter (hPrinter);\n \n ClosePrinter (hPrinter);\n \n // Si vous n'avez pas réussi, GetLastError peut donner plus d'informations\n // pourquoi pas.\n if (bSuccess == false)\n \n dwError = Marshal.GetLastWin32Error ();\n \n retourner bSuccess;\n ","html":"// Ouvre l'imprimante.\n if (OpenPrinter (szPrinterName.Normalize (), réf hPrinter, IntPtr.Zero))\n \n // Démarrer un document.\n if (StartDocPrinter (hPrinter, 1, di))\n \n // Démarrer une page.\n if (StartPagePrinter (hPrinter))\n \n // Ecrivez vos octets.\n bSuccess = WritePrinter (hPrinter, pBytes, dwCount, ref dwWritten);\n EndPagePrinter (hPrinter);\n \n EndDocPrinter (hPrinter);\n \n ClosePrinter (hPrinter);\n \n // Si vous n'avez pas réussi, GetLastError peut donner plus d'informations\n // pourquoi pas.\n if (bSuccess == false)\n \n dwError = Marshal.GetLastWin32Error ();\n \n retourner bSuccess;\n
"},{"id":"text-31","type":"text","heading":"","plain_text":" public bool statique SendFileToPrinter (string szPrinterName, string szFileName)\n \n // ouvre le fichier.\n FileStream fs = new FileStream (szFileName, FileMode.Open);\n // Crée un BinaryReader sur le fichier.\n BinaryReader br = new BinaryReader (fs);\n // Dimette un tableau d'octets assez grand pour contenir le contenu du fichier.\n Octet[] octets = nouvel octet[fs.Length];\n bool bSuccess = false;\n // Votre pointeur non géré.\n IntPtr pUnmanagedBytes = new IntPtr (0);\n int nLength = 0;","html":"public bool statique SendFileToPrinter (string szPrinterName, string szFileName)\n \n // ouvre le fichier.\n FileStream fs = new FileStream (szFileName, FileMode.Open);\n // Crée un BinaryReader sur le fichier.\n BinaryReader br = new BinaryReader (fs);\n // Dimette un tableau d'octets assez grand pour contenir le contenu du fichier.\n Octet[] octets = nouvel octet[fs.Length];\n bool bSuccess = false;\n // Votre pointeur non géré.\n IntPtr pUnmanagedBytes = new IntPtr (0);\n int nLength = 0;
"},{"id":"text-32","type":"text","heading":"","plain_text":" nLength = Convert.ToInt32 (fs.Length);\n // Lit le contenu du fichier dans le tableau.\n octets = br.ReadBytes (nLength);\n // Alloue de la mémoire non gérée pour ces octets.\n pUnmanagedBytes = Marshal.AllocCoTaskMem (nLength);\n // Copiez le tableau d'octets gérés dans le tableau non géré.\n Marshal.Copy (octets, 0, pUnmanagedBytes, nLength);\n // Envoie les octets non gérés à l'imprimante.\n bSuccess = SendBytesToPrinter (szPrinterName, pUnmanagedBytes, nLength);\n // Libère la mémoire non gérée que vous avez allouée précédemment.\n Marshal.FreeCoTaskMem (pUnmanagedBytes);\n retourner bSuccess;\n \n public bool statique SendStringToPrinter (string szPrinterName, string szString, string DocName = "")\n \n IntPtr pBytes = default (IntPtr);\n Int32 dwCount = default (Int32);\n // Combien de caractères y a-t-il dans la chaîne?\n dwCount = szString.Length;\n // Supposons que l'imprimante attend du texte ANSI, puis convertit\n // la chaîne en texte ANSI.\n pBytes = Marshal.StringToCoTaskMemAnsi (szString);\n // Envoie la chaîne ANSI convertie à l'imprimante.\n SendBytesToPrinter (szPrinterName, pBytes, dwCount, DocName);\n Marshal.FreeCoTaskMem (pBytes);\n retourne vrai;\n \n }\n}","html":"nLength = Convert.ToInt32 (fs.Length);\n // Lit le contenu du fichier dans le tableau.\n octets = br.ReadBytes (nLength);\n // Alloue de la mémoire non gérée pour ces octets.\n pUnmanagedBytes = Marshal.AllocCoTaskMem (nLength);\n // Copiez le tableau d'octets gérés dans le tableau non géré.\n Marshal.Copy (octets, 0, pUnmanagedBytes, nLength);\n // Envoie les octets non gérés à l'imprimante.\n bSuccess = SendBytesToPrinter (szPrinterName, pUnmanagedBytes, nLength);\n // Libère la mémoire non gérée que vous avez allouée précédemment.\n Marshal.FreeCoTaskMem (pUnmanagedBytes);\n retourner bSuccess;\n \n public bool statique SendStringToPrinter (string szPrinterName, string szString, string DocName = "")\n \n IntPtr pBytes = default (IntPtr);\n Int32 dwCount = default (Int32);\n // Combien de caractères y a-t-il dans la chaîne?\n dwCount = szString.Length;\n // Supposons que l'imprimante attend du texte ANSI, puis convertit\n // la chaîne en texte ANSI.\n pBytes = Marshal.StringToCoTaskMemAnsi (szString);\n // Envoie la chaîne ANSI convertie à l'imprimante.\n SendBytesToPrinter (szPrinterName, pBytes, dwCount, DocName);\n Marshal.FreeCoTaskMem (pBytes);\n retourne vrai;\n \n }\n}
"},{"id":"text-33","type":"text","heading":"","plain_text":"page html:","html":"page html:
"},{"id":"text-34","type":"text","heading":"","plain_text":"Enviar","html":"Enviar
"},{"id":"text-35","type":"text","heading":"","plain_text":"puis envoyez un code ZPL à partir de HTML (écrivez ceci sur du code textarea);\n^ XA\n^ FO200,50 ^ BY2 ^ B3N, N, 80, Y, N ^ FD0123456789 ^ FS\n^ PQ1 ^ XZ","html":"puis envoyez un code ZPL à partir de HTML (écrivez ceci sur du code textarea);\n^ XA\n^ FO200,50 ^ BY2 ^ B3N, N, 80, Y, N ^ FD0123456789 ^ FS\n^ PQ1 ^ XZ
"},{"id":"text-36","type":"text","heading":"","plain_text":"Click to rate this post!\n \n [Total: 0 Average: 0]","html":"Click to rate this post!\n \n [Total: 0 Average: 0]
"}],"sections":[{"id":"text-1","heading":"Text","content":"essayez de créer un WebSocket qui contrôle l’impression côté client et envoie les données avec ajax de la page à localhost.\n/// websocket\nen utilisant le système;\nusing System.Net;\nusing System.Net.WebSockets;\nusing System.Text;\nusing System.Threading;"},{"id":"text-2","heading":"Text","content":"Serveur d'espace de noms\n{\n programme de classe\n \n WebsocketServer statique public ws;\n static void Main (chaîne[] args)\n \n ws = new Server.WebsocketServer ();\n ws.LogMessage + = Ws_LogMessage;\n ws.Start ("http: // localhost: 2645 / service /");\n Console.WriteLine ("Appuyez sur n'importe quelle touche pour quitter ...");\n Console.ReadKey ();\n "},{"id":"text-3","heading":"Text","content":" void statique privé Ws_LogMessage (expéditeur de l'objet, WebsocketServer.LogMessageEventArgs e)\n \n Console.WriteLine (e.Message);\n \n "},{"id":"text-4","heading":"Text","content":" classe publique WebsocketServer\n {\n événement public OnLogMessage LogMessage;\n délégué public void OnLogMessage (Expéditeur d'objet, LogMessageEventArgs e);\n Classe publique LogMessageEventArgs: EventArgs\n \n chaîne publique Message get; ensemble; \n public LogMessageEventArgs (chaîne Message)\n \n this.Message = Message;\n \n "},{"id":"text-5","heading":"Text","content":" bool public started = false;\n public async void Start (chaîne httpListenerPrefix)\n \n HttpListener httpListener = new HttpListener ();\n httpListener.Prefixes.Add (httpListenerPrefix);\n httpListener.Start ();\n LogMessage (this, new LogMessageEventArgs ("Listening ..."));\n commencé = vrai;"},{"id":"text-6","heading":"Text","content":" alors que (commencé)\n \n HttpListenerContext httpListenerContext = wait httpListener.GetContextAsync ();\n if (httpListenerContext.Request.IsWebSocketRequest)\n \n ProcessRequest (httpListenerContext);\n \n autre\n \n httpListenerContext.Response.StatusCode = 400;\n httpListenerContext.Response.Close ();\n LogMessage (this, new LogMessageEventArgs ("Closed ..."));\n \n \n "},{"id":"text-7","heading":"Text","content":" public void Stop ()\n \n commencé = faux;\n \n ProcessRequest (HttpListenerContext httpListenerContext)\n {\n WebSocketContext webSocketContext = null;"},{"id":"text-8","heading":"Text","content":" essayer\n \n webSocketContext = wait httpListenerContext.AcceptWebSocketAsync (subProtocol: null);\n LogMessage (this, nouveau LogMessageEventArgs ("Connecté"));\n \n catch (Exception e)\n \n httpListenerContext.Response.StatusCode = 500;\n httpListenerContext.Response.Close ();\n LogMessage (this, new LogMessageEventArgs (String.Format ("Exception: 0", e)));\n revenir;\n "},{"id":"text-9","heading":"Text","content":" WebSocket webSocket = webSocketContext.WebSocket;\n essayer\n {"},{"id":"text-10","heading":"Text","content":" while (webSocket.State == WebSocketState.Open)\n {"},{"id":"text-11","heading":"Text","content":" ArraySegment buffer = new ArraySegment(nouvel octet[8192])"},{"id":"text-12","heading":"Text","content":" WebSocketReceiveResult resultat = null;"},{"id":"text-13","heading":"Text","content":" using (var ms = new System.IO.MemoryStream ())\n {\n faire\n \n result = wait webSocket.ReceiveAsync (tampon, CancellationToken.None);\n ms.Write (buffer.Array, buffer.Offset, result.Count);\n \n while (! result.EndOfMessage);"},{"id":"text-14","heading":"Text","content":" ms.Seek (0, System.IO.SeekOrigin.Begin);"},{"id":"text-15","heading":"Text","content":" if (result.MessageType == WebSocketMessageType.Text)\n {\n using (var reader = new System.IO.StreamReader (ms, Encoding.UTF8))\n \n var r = System.Text.Encoding.UTF8.GetString (ms.ToArray ());\n var t = Newtonsoft.Json.JsonConvert.DeserializeObject(r);\n bool valid = true;\n octet[] toBytes = Encoding.UTF8.GetBytes (""); ;"},{"id":"text-16","heading":"Text","content":" si (t! = null)\n \n if (t.printer.Trim () == string.Empty)\n \n var imprimantes = "";\n foreach (var imp dans System.Drawing.Printing.PrinterSettings.InstalledPrinters)\n \n imprimantes + = imp + " n";\n "},{"id":"text-17","heading":"Text","content":" toBytes = Encoding.UTF8.GetBytes ("Aucune indication sur l'impression nLas Impresoras disponibles:" + imprimantes);\n valide = faux;\n \n if (t.name.Trim () == string.Empty)\n \n toBytes = Encoding.UTF8.GetBytes ("Aucune indication sur le document");\n valide = faux;\n \n if (t.code == null)\n \n toBytes = Encoding.UTF8.GetBytes ("Aucune donnée n'est affichée à la suite de l'impression");\n valide = faux;\n "},{"id":"text-18","heading":"Text","content":" si (valide)\n \n print.RawPrinter.SendStringToPrinter (t.printer, t.code, t.name);\n toBytes = Encoding.UTF8.GetBytes ("Correcto ...");\n "},{"id":"text-19","heading":"Text","content":" attendez webSocket.SendAsync (nouvel ArraySegment(toBytes, 0, int.Parse (toBytes.Length.ToString ())), WebSocketMessageType.Binary, result.EndOfMessage, CancellationToken.None);\n \n autre\n \n toBytes = Encoding.UTF8.GetBytes ("Erreur ...");\n attendez webSocket.SendAsync (nouvel ArraySegment(toBytes, 0, int.Parse (toBytes.Length.ToString ())), WebSocketMessageType.Binary, result.EndOfMessage, CancellationToken.None);\n \n \n }\n }\n }\n }\n catch (Exception e)\n \n LogMessage (this, new LogMessageEventArgs (String.Format ("Exception: 0 nLinea: 1", e, e.StackTrace))));\n \n enfin\n \n si (webSocket! = null)\n webSocket.Dispose ();\n \n }\n }"},{"id":"text-20","heading":"Text","content":" classe publique Datos\n \n nom de chaîne publique get; ensemble; \n code de chaîne publique get; ensemble; \n chaîne publique imprimante get; ensemble; = "";\n \n}"},{"id":"text-21","heading":"Text","content":"impression brute:\nusing Microsoft.VisualBasic;\nen utilisant le système;\nusing System.Collections;\nusing System.Collections.Generic;\nusing System.Data;\nusing System.Diagnostics;\nusing System.Runtime.InteropServices;\nusing System.IO;"},{"id":"text-22","heading":"Text","content":"print de l'espace de noms\n{\n Classe publique RawPrinter\n {\n // Déclarations de structure et d'API:\n [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]\n classe publique DOCINFOA\n \n [MarshalAs(UnmanagedType.LPStr)]\n chaîne publique pDocName;\n [MarshalAs(UnmanagedType.LPStr)]\n chaîne publique pOutputFile;\n [MarshalAs(UnmanagedType.LPStr)]\n chaîne publique pDataType;\n \n [DllImport(\"winspool.Drv\", EntryPoint = \"OpenPrinterA\", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique extern bool OpenPrinter ([MarshalAs(UnmanagedType.LPStr)]\nchaîne szPrinter, réf IntPtr hPriknter, IntPtr pd);"},{"id":"text-23","heading":"Text","content":"[DllImport(\"winspool.Drv\", EntryPoint = \"ClosePrinter\", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public extern externe bool ClosePrinter (IntPtr hPrinter);"},{"id":"text-24","heading":"Text","content":"[DllImport(\"winspool.Drv\", EntryPoint = \"StartDocPrinterA\", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique externe bool StartDocPrinter (IntPtr hPrinter, niveau Int32, [In(), MarshalAs(UnmanagedType.LPStruct)]\nDOCINFOA di);"},{"id":"text-25","heading":"Text","content":"[DllImport(\"winspool.Drv\", EntryPoint = \"EndDocPrinter\", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public extern externe bool EndDocPrinter (IntPtr hPrinter);"},{"id":"text-26","heading":"Text","content":"[DllImport(\"winspool.Drv\", EntryPoint = \"StartPagePrinter\", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique extern bool StartPagePrinter (IntPtr hPrinter);"},{"id":"text-27","heading":"Text","content":"[DllImport(\"winspool.Drv\", EntryPoint = \"EndPagePrinter\", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique extern bool EndPagePrinter (IntPtr hPrinter);"},{"id":"text-28","heading":"Text","content":"[DllImport(\"winspool.Drv\", EntryPoint = \"WritePrinter\", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]\n public statique externe bool WritePrinter (IntPtr hPrinter, IntPtr pBytes, Int32 dwCount, ref Int32 dwWritten);"},{"id":"text-29","heading":"Text","content":" // SendBytesToPrinter ()\n // Lorsque la fonction reçoit un nom d'imprimante et un tableau non géré\n // d'octets, la fonction envoie ces octets à la file d'attente d'impression.\n // Renvoie true en cas de succès, false en cas d'échec.\n public bool statique SendBytesToPrinter (chaîne szPrinterName, pbits IntPtr, dwCount Int32, chaîne DocName = "")\n \n Int32 dwError = 0;\n Int32 dwWritten = 0;\n IntPtr hPrinter = new IntPtr (0);\n DOCINFOA di = new DOCINFOA ();\n bool bSuccess = false;\n // Suppose l'échec sauf si vous y parvenez.\n di.pDocName = string.IsNullOrEmpty (DocName)? "Mon document RAW C # .NET": DocName;\n di.pDataType = "RAW";"},{"id":"text-30","heading":"Text","content":" // Ouvre l'imprimante.\n if (OpenPrinter (szPrinterName.Normalize (), réf hPrinter, IntPtr.Zero))\n \n // Démarrer un document.\n if (StartDocPrinter (hPrinter, 1, di))\n \n // Démarrer une page.\n if (StartPagePrinter (hPrinter))\n \n // Ecrivez vos octets.\n bSuccess = WritePrinter (hPrinter, pBytes, dwCount, ref dwWritten);\n EndPagePrinter (hPrinter);\n \n EndDocPrinter (hPrinter);\n \n ClosePrinter (hPrinter);\n \n // Si vous n'avez pas réussi, GetLastError peut donner plus d'informations\n // pourquoi pas.\n if (bSuccess == false)\n \n dwError = Marshal.GetLastWin32Error ();\n \n retourner bSuccess;\n "},{"id":"text-31","heading":"Text","content":" public bool statique SendFileToPrinter (string szPrinterName, string szFileName)\n \n // ouvre le fichier.\n FileStream fs = new FileStream (szFileName, FileMode.Open);\n // Crée un BinaryReader sur le fichier.\n BinaryReader br = new BinaryReader (fs);\n // Dimette un tableau d'octets assez grand pour contenir le contenu du fichier.\n Octet[] octets = nouvel octet[fs.Length];\n bool bSuccess = false;\n // Votre pointeur non géré.\n IntPtr pUnmanagedBytes = new IntPtr (0);\n int nLength = 0;"},{"id":"text-32","heading":"Text","content":" nLength = Convert.ToInt32 (fs.Length);\n // Lit le contenu du fichier dans le tableau.\n octets = br.ReadBytes (nLength);\n // Alloue de la mémoire non gérée pour ces octets.\n pUnmanagedBytes = Marshal.AllocCoTaskMem (nLength);\n // Copiez le tableau d'octets gérés dans le tableau non géré.\n Marshal.Copy (octets, 0, pUnmanagedBytes, nLength);\n // Envoie les octets non gérés à l'imprimante.\n bSuccess = SendBytesToPrinter (szPrinterName, pUnmanagedBytes, nLength);\n // Libère la mémoire non gérée que vous avez allouée précédemment.\n Marshal.FreeCoTaskMem (pUnmanagedBytes);\n retourner bSuccess;\n \n public bool statique SendStringToPrinter (string szPrinterName, string szString, string DocName = "")\n \n IntPtr pBytes = default (IntPtr);\n Int32 dwCount = default (Int32);\n // Combien de caractères y a-t-il dans la chaîne?\n dwCount = szString.Length;\n // Supposons que l'imprimante attend du texte ANSI, puis convertit\n // la chaîne en texte ANSI.\n pBytes = Marshal.StringToCoTaskMemAnsi (szString);\n // Envoie la chaîne ANSI convertie à l'imprimante.\n SendBytesToPrinter (szPrinterName, pBytes, dwCount, DocName);\n Marshal.FreeCoTaskMem (pBytes);\n retourne vrai;\n \n }\n}"},{"id":"text-33","heading":"Text","content":"page html:"},{"id":"text-34","heading":"Text","content":"Enviar"},{"id":"text-35","heading":"Text","content":"puis envoyez un code ZPL à partir de HTML (écrivez ceci sur du code textarea);\n^ XA\n^ FO200,50 ^ BY2 ^ B3N, N, 80, Y, N ^ FD0123456789 ^ FS\n^ PQ1 ^ XZ"},{"id":"text-36","heading":"Text","content":"Click to rate this post!\n \n [Total: 0 Average: 0]"}],"media":{"primary_image":"https://tutos-gameserver.fr/wp-content/uploads/2019/04/apple-touch-icon@2.png"},"relations":[{"rel":"canonical","href":"https://tutos-gameserver.fr/2019/05/03/impression-imprimer-des-codes-a-barres-dune-page-web-vers-une-imprimante-zebra-serveur-dimpression/"},{"rel":"alternate","href":"https://tutos-gameserver.fr/2019/05/03/impression-imprimer-des-codes-a-barres-dune-page-web-vers-une-imprimante-zebra-serveur-dimpression/llm","type":"text/html"},{"rel":"alternate","href":"https://tutos-gameserver.fr/2019/05/03/impression-imprimer-des-codes-a-barres-dune-page-web-vers-une-imprimante-zebra-serveur-dimpression/llm.json","type":"application/json"},{"rel":"llm-manifest","href":"https://tutos-gameserver.fr/llm-endpoints-manifest.json","type":"application/json"}],"http_headers":{"X-LLM-Friendly":"1","X-LLM-Schema":"1.1.0","Content-Security-Policy":"default-src 'none'; img-src * data:; style-src 'unsafe-inline'"},"license":"CC BY-ND 4.0","attribution_required":true,"allow_cors":false}