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neodynamicneodynamic
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ASP.NET WebForms C#
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‎WCPWebFormsCS/DemoPrintCommands.aspx

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‎WCPWebFormsCS/DemoPrintCommandsHandler.ashx

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<%@ WebHandler Language="C#" Class="DemoPrintCommandsHandler" %>
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using System;
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using System.Web;
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using Neodynamic.SDK.Web;
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public class DemoPrintCommandsHandler : IHttpHandler {
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/*############### IMPORTANT!!! ############
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If your website requires AUTHENTICATION, then you MUST configure THIS Handler file
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to be ANONYMOUS access allowed!!!
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######################################### */
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const string PRINTER_ID = "-PID";
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const string INSTALLED_PRINTER_NAME = "-InstalledPrinterName";
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const string NET_PRINTER_HOST = "-NetPrinterHost";
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const string NET_PRINTER_PORT = "-NetPrinterPort";
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const string PARALLEL_PORT = "-ParallelPort";
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const string SERIAL_PORT = "-SerialPort";
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const string SERIAL_PORT_BAUDS = "-SerialPortBauds";
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const string SERIAL_PORT_DATA_BITS = "-SerialPortDataBits";
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const string SERIAL_PORT_STOP_BITS = "-SerialPortStopBits";
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const string SERIAL_PORT_PARITY = "-SerialPortParity";
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const string SERIAL_PORT_FLOW_CONTROL = "-SerialPortFlowControl";
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const string PRINTER_COMMANDS = "-PrinterCommands";
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public void ProcessRequest(HttpContext context)
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{
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string pid = context.Request["pid"];
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string sid = context.Request["sid"];
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if (string.IsNullOrEmpty(pid) == false)
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{
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//store client printer settings
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string installedPrinterName = context.Request["installedPrinterName"];
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string netPrinterHost = context.Request["netPrinterHost"];
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string netPrinterPort = context.Request["netPrinterPort"];
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string parallelPort = context.Request["parallelPort"];
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string serialPort = context.Request["serialPort"];
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string serialPortBauds = context.Request["serialPortBauds"];
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string serialPortDataBits = context.Request["serialPortDataBits"];
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string serialPortStopBits = context.Request["serialPortStopBits"];
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string serialPortParity = context.Request["serialPortParity"];
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string serialPortFlowControl = context.Request["serialPortFlowControl"];
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string printerCommands = context.Request["printerCommands"];
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ClientPrinterSettings(sid,
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pid,
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installedPrinterName,
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netPrinterHost,
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netPrinterPort,
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parallelPort,
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serialPort,
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serialPortBauds,
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serialPortDataBits,
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serialPortStopBits,
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serialPortParity,
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serialPortFlowControl,
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printerCommands);
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}
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else
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{
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//generate client print job
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ClientPrint(sid);
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}
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}
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private void ClientPrinterSettings(string sid,
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string pid,
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string installedPrinterName,
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string netPrinterHost,
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string netPrinterPort,
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string parallelPort,
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string serialPort,
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string serialPortBauds,
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string serialPortDataBits,
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string serialPortStopBits,
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string serialPortParity,
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string serialPortFlowControl,
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string printerCommands)
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{
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try
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{
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HttpApplicationState app = HttpContext.Current.Application;
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//save settings in the global Application obj
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//save the type of printer selected by the user
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int i = int.Parse(pid);
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app[sid + PRINTER_ID] = i;
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if (i == 2)
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{
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app[sid + INSTALLED_PRINTER_NAME] = installedPrinterName;
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}
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else if (i == 3)
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{
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app[sid + NET_PRINTER_HOST] = netPrinterHost;
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app[sid + NET_PRINTER_PORT] = netPrinterPort;
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}
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else if (i == 4)
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{
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app[sid + PARALLEL_PORT] = parallelPort;
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}
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else if (i == 5)
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{
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app[sid + SERIAL_PORT] = serialPort;
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app[sid + SERIAL_PORT_BAUDS] = serialPortBauds;
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app[sid + SERIAL_PORT_DATA_BITS] = serialPortDataBits;
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app[sid + SERIAL_PORT_FLOW_CONTROL] = serialPortFlowControl;
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app[sid + SERIAL_PORT_PARITY] = serialPortParity;
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app[sid + SERIAL_PORT_STOP_BITS] = serialPortStopBits;
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}
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//save the printer commands specified by the user
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app[sid + PRINTER_COMMANDS] = printerCommands;
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}
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catch (Exception ex)
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{
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throw ex;
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}
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}
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//sid: user session id who is requesting a ClientPrintJob
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private void ClientPrint(string sid)
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{
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if (WebClientPrint.ProcessPrintJob(System.Web.HttpContext.Current.Request.Url.Query))
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{
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HttpApplicationState app = HttpContext.Current.Application;
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//Create a ClientPrintJob obj that will be processed at the client side by the WCPP
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ClientPrintJob cpj = new ClientPrintJob();
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//get printer commands for this user id
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object printerCommands = app[sid + PRINTER_COMMANDS];
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if (printerCommands != null)
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{
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cpj.PrinterCommands = printerCommands.ToString();
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cpj.FormatHexValues = true;
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}
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//get printer settings for this user id
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int printerTypeId = (int)app[sid + PRINTER_ID];
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if (printerTypeId == 0) //use default printer
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{
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cpj.ClientPrinter = new DefaultPrinter();
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}
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else if (printerTypeId == 1) //show print dialog
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{
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cpj.ClientPrinter = new UserSelectedPrinter();
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}
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else if (printerTypeId == 2) //use specified installed printer
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{
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cpj.ClientPrinter = new InstalledPrinter(app[sid + INSTALLED_PRINTER_NAME].ToString());
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}
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else if (printerTypeId == 3) //use IP-Ethernet printer
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{
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cpj.ClientPrinter = new NetworkPrinter(app[sid + NET_PRINTER_HOST].ToString(), int.Parse(app[sid + NET_PRINTER_PORT].ToString()));
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}
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else if (printerTypeId == 4) //use Parallel Port printer
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{
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cpj.ClientPrinter = new ParallelPortPrinter(app[sid + PARALLEL_PORT].ToString());
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}
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else if (printerTypeId == 5) //use Serial Port printer
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{
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cpj.ClientPrinter = new SerialPortPrinter(app[sid + SERIAL_PORT].ToString(),
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int.Parse(app[sid + SERIAL_PORT_BAUDS].ToString()),
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(SerialPortParity)Enum.Parse(typeof(SerialPortParity), app[sid + SERIAL_PORT_PARITY].ToString()),
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(SerialPortStopBits)Enum.Parse(typeof(SerialPortStopBits), app[sid + SERIAL_PORT_STOP_BITS].ToString()),
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int.Parse(app[sid + SERIAL_PORT_DATA_BITS].ToString()),
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(SerialPortHandshake)Enum.Parse(typeof(SerialPortHandshake), app[sid + SERIAL_PORT_FLOW_CONTROL].ToString()));
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}
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//Send ClientPrintJob back to the client
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System.Web.HttpContext.Current.Response.ContentType = "application/octet-stream";
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System.Web.HttpContext.Current.Response.BinaryWrite(cpj.GetContent());
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System.Web.HttpContext.Current.Response.End();
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}
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}
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public bool IsReusable {
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get {
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return false;
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}
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}
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}

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