使用 c# 打印多个文档

Question

我想使用 C# .Net 打印多个静默文件（txt、pdf、htm、...）。我尝试了各种方法，我使用了 ShellExecute、Process、PrintDocument，都没有成功。有一个应用程序“http://www.print-conductor.com/download/”正是我需要的，有人知道它是如何工作的吗？例如，它在不打开 adobe 阅读器的情况下打印 pdf 文件，甚至在任务管理器 adobe 中也没有出现，唯一的要求是让他的应用程序与文件相关联。感谢您的帮助。

使用下面的ShellExecute方法我可以发送打印，但是如果pdf Adob​​e Reader是打开的，安静的是他没有打开，文件要直接发送到打印队列。

[DllImport("shell32.dll", EntryPoint = "ShellExecute")]
    private static extern IntPtr ShellExecute(IntPtr hwnd, string lpOperation, string lpFile, string lpParameters,
                                              string lpDirectory, ShowCommands nShowCmd);

    public bool Print(string fullPath)
    {
        var result = false;
        try
        {
            var resultPrint = ShellExecute(IntPtr.Zero, "Print", fullPath, "", "", ShowCommands.SwShowminimized).ToInt32();
            if (resultPrint > 32) result = true;

        }
        catch (Exception ex)
        {
            throw new Exception(ex.ToString());
        }
        return result;
    }

对于提出问题第一部分的方式，我深表歉意，我为未能交付项目而感到难过，我已经 3 周了，一无所获，请原谅我。

又一次尝试不成功，文件出现在打印队列中，但打印的是空白：

public class RawPrinterHelper
{
    // Structure and API declarions:
    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
    public class DOCINFOA
    {
        [MarshalAs(UnmanagedType.LPStr)]
        public string pDocName;
        [MarshalAs(UnmanagedType.LPStr)]
        public string pOutputFile;
        [MarshalAs(UnmanagedType.LPStr)]
        public string pDataType;
    }
    [DllImport("winspool.Drv", EntryPoint = "OpenPrinterA", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
    public static extern bool OpenPrinter([MarshalAs(UnmanagedType.LPStr)] string szPrinter, out IntPtr hPrinter, IntPtr pd);

    [DllImport("winspool.Drv", EntryPoint = "ClosePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
    public static extern bool ClosePrinter(IntPtr hPrinter);

    [DllImport("winspool.Drv", EntryPoint = "StartDocPrinterA", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
    public static extern bool StartDocPrinter(IntPtr hPrinter, Int32 level, [In, MarshalAs(UnmanagedType.LPStruct)] DOCINFOA di);

    [DllImport("winspool.Drv", EntryPoint = "EndDocPrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
    public static extern bool EndDocPrinter(IntPtr hPrinter);

    [DllImport("winspool.Drv", EntryPoint = "StartPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
    public static extern bool StartPagePrinter(IntPtr hPrinter);

    [DllImport("winspool.Drv", EntryPoint = "EndPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
    public static extern bool EndPagePrinter(IntPtr hPrinter);

    [DllImport("winspool.Drv", EntryPoint = "WritePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
    public static extern bool WritePrinter(IntPtr hPrinter, IntPtr pBytes, Int32 dwCount, out Int32 dwWritten);

    // SendBytesToPrinter()
    // When the function is given a printer name and an unmanaged array
    // of bytes, the function sends those bytes to the print queue.
    // Returns true on success, false on failure.
    public static bool SendBytesToPrinter(string szPrinterName, IntPtr pBytes, Int32 dwCount)
    {
        Int32 dwError = 0, dwWritten = 0;
        IntPtr hPrinter = new IntPtr(0);
        DOCINFOA di = new DOCINFOA();
        bool bSuccess = false; // Assume failure unless you specifically succeed.

        di.pDocName = "My C#.NET RAW Document";
        di.pDataType = "RAW";

        // Open the printer.
        if (OpenPrinter(szPrinterName.Normalize(), out hPrinter, IntPtr.Zero))
        {
            // Start a document.
            if (StartDocPrinter(hPrinter, 1, di))
            {
                // Start a page.
                if (StartPagePrinter(hPrinter))
                {
                    // Write your bytes.
                    bSuccess = WritePrinter(hPrinter, pBytes, dwCount, out dwWritten);
                    EndPagePrinter(hPrinter);
                }
                EndDocPrinter(hPrinter);
            }
            ClosePrinter(hPrinter);
        }
        // If you did not succeed, GetLastError may give more information
        // about why not.
        if (bSuccess == false)
        {
            dwError = Marshal.GetLastWin32Error();
        }
        return bSuccess;
    }

    public static bool SendFileToPrinter(string szPrinterName, string szFileName)
    {
        // Open the file.
        FileStream fs = new FileStream(szFileName, FileMode.Open);
        // Create a BinaryReader on the file.
        BinaryReader br = new BinaryReader(fs);
        // Dim an array of bytes big enough to hold the file's contents.
        Byte[] bytes = new Byte[fs.Length];
        bool bSuccess = false;
        // Your unmanaged pointer.
        IntPtr pUnmanagedBytes = new IntPtr(0);
        int nLength;

        nLength = Convert.ToInt32(fs.Length);
        // Read the contents of the file into the array.
        bytes = br.ReadBytes(nLength);
        // Allocate some unmanaged memory for those bytes.
        pUnmanagedBytes = Marshal.AllocCoTaskMem(nLength);
        // Copy the managed byte array into the unmanaged array.
        Marshal.Copy(bytes, 0, pUnmanagedBytes, nLength);
        // Send the unmanaged bytes to the printer.
        bSuccess = SendBytesToPrinter(szPrinterName, pUnmanagedBytes, nLength);
        // Free the unmanaged memory that you allocated earlier.
        Marshal.FreeCoTaskMem(pUnmanagedBytes);
        return bSuccess;
    }
    public static bool SendStringToPrinter(string szPrinterName, string szString)
    {
        IntPtr pBytes;
        Int32 dwCount;
        // How many characters are in the string?
        dwCount = szString.Length;
        // Assume that the printer is expecting ANSI text, and then convert
        // the string to ANSI text.
        pBytes = Marshal.StringToCoTaskMemAnsi(szString);
        // Send the converted ANSI string to the printer.
        SendBytesToPrinter(szPrinterName, pBytes, dwCount);
        Marshal.FreeCoTaskMem(pBytes);
        return true;
    }
}

class Program
{
    private static void Main(string[] args)
    {

        var defaultPrintQueue = LocalPrintServer.GetDefaultPrintQueue();
        RawPrinterHelper.SendFileToPrinter(defaultPrintQueue.FullName, @"C:\Temp\Teste.pdf");

    }
}

使用下面的选项，Adobe Reader 也会打开并保持打开状态：

public void Print(string fullPath, string printerName)
    {
        Process process = new Process
                              {
                                  StartInfo =
                                      {
                                          FileName = fullPath,
                                          UseShellExecute = true,
                                          Verb = "printto",
                                          Arguments = "\"" + printerName + "\""
                                      }
                              };

        process.Start();
    }

• Visual Studio 2013、C#、Windows 8.1

Answer 1

如果您查看 Print Conductor 的“工作原理”链接，它会显示：

“Print Conductor 的特殊能力是自动将文档发送到其他程序进行打印。

....

需要 Adob​​e Reader 或 Adob​​e Acrobat 来打印 PDF 文件。”

所以实际上它确实打开 Acrobat（或至少是与 PDF 文件关联的应用程序）以打印它们。恐怕要打印任意类型的文档，您需要一个了解如何读取文档以及如何呈现文档的应用程序。

操作系统可以理解某些文档类型（例如 Windows 和 XPS 文件），无需任何附加软件即可打印，但一般情况下没有这样的解决方案。