关于网络打印的问题

Question

需求如下：

1.点击网络打印时，生成待打印文本TXT(已实现)

2.自动搜索当前局域网内打印机

3.选择打印机后，打印生成的文本

注：WINFORM程序，在本地通过COPY命令打印成功

谢谢！！！

Answer 1

需求有问题，局域网打印机一般不对用户开放。你的用户是登录到域或者或者管理员启用匿名用户访问？

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Visual C++ MVP

Answer 2

你好 參考下 Netapi32.dll

http://www.webtropy.com/articles/art9-2.asp?lib=netapi32.dll

using System;
    using System.Runtime.InteropServices;
    using System.Security;
    sealed class Tester
    {
        [DllImport("Netapi32", CharSet = CharSet.Auto, SetLastError = true),
        SuppressUnmanagedCodeSecurityAttribute]
        static extern int NetServerEnum(
        string ServerNane, // must be null
        int dwLevel,
        ref IntPtr pBuf,
        int dwPrefMaxLen,
        out int dwEntriesRead,
        out int dwTotalEntries,
        int dwServerType,
        string domain, // null for login domain
        out int dwResumeHandle
        );
        [DllImport("Netapi32", SetLastError = true),
        SuppressUnmanagedCodeSecurityAttribute]
        static extern int NetApiBufferFree(
        IntPtr pBuf);

        [StructLayout(LayoutKind.Sequential)]
        struct _SERVER_INFO_100
        {
            internal int sv100_platform_id;
            [MarshalAs(UnmanagedType.LPWStr)]
            internal string sv100_name;
        }
        static void Main()
        {
            const int MAX_PREFERRED_LENGTH = -1;
            int SV_TYPE_WORKSTATION = 1;
            int SV_TYPE_SERVER = 2;
            IntPtr buffer = IntPtr.Zero;
            IntPtr tmpBuffer = IntPtr.Zero;
            int entriesRead = 0;
            int totalEntries = 0;
            int resHandle = 0;
            int sizeofINFO = Marshal.SizeOf(typeof(_SERVER_INFO_100));
            try
            {
                int ret = NetServerEnum(null, 100, ref buffer, MAX_PREFERRED_LENGTH,
                out entriesRead,
                out totalEntries, SV_TYPE_WORKSTATION | SV_TYPE_SERVER, null, out resHandle);
                if (ret == 0)
                {
                    for (int i = 0; i < totalEntries; i++)
                    {
                        tmpBuffer = new IntPtr((int)buffer + (i * sizeofINFO));
                        _SERVER_INFO_100 svrInfo = (_SERVER_INFO_100)
                        Marshal.PtrToStructure(tmpBuffer, typeof(_SERVER_INFO_100));
                        Console.WriteLine(svrInfo.sv100_name);
                    }
                }
            }
            finally
            {
                NetApiBufferFree(buffer);
            }
        }
    }

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I see you~http://hi.baidu.com/1987raymondMy Blog~~~

Answer 3

Raymond Tang 的方法枚举了网上邻居的内容。 刘汉威 是想枚举网络打印机（以匿名用户）。

Answer 4

------------------------------------------------------------------------------------------------------

1 枚举本机所有打印机，包括网络打印机

     foreach (string s in System.Drawing.Printing.PrinterSettings.InstalledPrinters)1
            {
                this.comboBox1.Items.Add(s);
            }

 

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2 下面是我在网上看到一别人写的方法：（获取打印机和打印状态）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.DirectoryServices;
using System.Runtime.InteropServices;
using ActiveDs;   //   Import   activeds.tlb   interop   assembly

namespace GetNetPrint
{
    [Flags]
    enum PrinterStatus
    {
        Paused = 1,
        DeletePending = 2,
        Error = 3,
        PaperJam = 4,
        PaperOut = 5
    } 

    class Program
    {
        static void Main(string[] args)
        {
            DirectoryEntry printer = new DirectoryEntry("WinNT://servername/printqueuename", null, null, AuthenticationTypes.ServerBind);
            Console.WriteLine(printer.Path);
            PropertyCollection pcoll = printer.Properties;
            try
            {
                foreach (string sc in pcoll.PropertyNames)
                {
                    Console.WriteLine(sc + ":\t" + (pcoll[sc])[0].ToString());
                } Console.WriteLine("---------------------------------");
            }
            catch (COMException ex)
            {
                Console.WriteLine(ex.Message);
            }

            //   Use   the   PrintqueueOperations   interface   to   contol   the   printer   Queue 
            IADsPrintQueueOperations po = printer.NativeObject as IADsPrintQueueOperations;
            if (po != null)
            {
                if (po.Status == (int)PrinterStatus.Paused)   //   If   paused   resume   else   pause   printer 
                    po.Resume();
                else
                    po.Pause();
                //   Use   the   IADsPrintJob   to   control   individual   printjobs 
                foreach (IADsPrintJob pj in po.PrintJobs())
                {
                    Console.WriteLine("{0}   -   {1}", pj.Description, pj.Name);
                    IADsPrintJobOperations pjo = pj as IADsPrintJobOperations;
                    Console.WriteLine(pjo.Name);
                    //   Use   IADsPrintJob.Name   as   arg.   to   remove   the   job   from   the   queue 
                    po.PrintJobs().Remove(pj.Name);
                }
            }
            printer.Dispose();
        }
    }  
}