用C# WinForms如何检测整个局域网内的所有打印机是否可用.

zjhappy520 2008-08-28 03:03:29

各位帮帮忙啊.. 补充一下:就是本机不添加打印机的情况下检测...

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hmhhmhhmh 2011-08-14

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private void button5_Click(object sender, EventArgs e)

        {

              DirectoryEntry   printer   =   new   DirectoryEntry("WinNT://servername/printqueuename",   null,   null,   AuthenticationTypes.ServerBind);   

              listBox1.Items.Add(printer.Path);   

              System.DirectoryServices.PropertyCollection   pcoll   =   printer.Properties;   

              try   

              {   

                foreach(string   sc   in   pcoll.PropertyNames)   

                {   

                  listBox1.Items.Add(sc   +   ":\t"   +   (pcoll[sc])[0].ToString());

                } 

                listBox1.Items.Add("---------------------------------");   

              }   

              catch(COMException   ex)   

              {

                  listBox1.Items.Add(ex.Message);   

              }   

        }

红色改为//104print（电脑名字）/EPSON Stylus Photo R230 Series(打印机名字)

运行结果如下：



 <select size="4" name="ListBox1" id="ListBox1" style="height:343px;width:481px;">

	<option value="WinNT://104print/EPSON Stylus Photo R230 Series">WinNT://104print/EPSON Stylus Photo R230 Series</option>

	<option value="PrinterName:	\\104print\EPSON Stylus Photo R230 Series">PrinterName:	\\104print\EPSON Stylus Photo R230 Series</option>

	<option value="Model:	EPSON Stylus Photo R230 Series">Model:	EPSON Stylus Photo R230 Series</option>

	<option value="PrintProcessor:	WinPrint">PrintProcessor:	WinPrint</option>

	<option value="Location:	">Location:	</option>

	<option value="Datatype:	RAW">Datatype:	RAW</option>

	<option value="BannerPage:	">BannerPage:	</option>

	<option value="Description:	">Description:	</option>

	<option value="PrinterPath:	\\104print\EPSON Stylus Photo R230 Series">PrinterPath:	\\104print\EPSON Stylus Photo R230 Series</option>

	<option value="Priority:	1">Priority:	1</option>

	<option value="PrintDevices:	USB001">PrintDevices:	USB001</option>

	<option value="DefaultJobPriority:	0">DefaultJobPriority:	0</option>

	<option value="JobCount:	0">JobCount:	0</option>

	<option value="Attributes:	2584">Attributes:	2584</option>

	<option value="StartTime:	1899-12-30 8:00:00">StartTime:	1899-12-30 8:00:00</option>

	<option value="UntilTime:	1899-12-30 8:00:00">UntilTime:	1899-12-30 8:00:00</option>

	<option value="Name:	EPSON Stylus Photo R230 Series">Name:	EPSON Stylus Photo R230 Series</option>

	<option value="ObjectGUID:	">ObjectGUID:	</option>

	<option value="Action:	4">Action:	4</option>

	<option value="---------------------------------">---------------------------------</option>



</select>

作用列单台打印机的信息。

C771048104 2011-03-07

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怎么引用24楼的代码

C771048104 2011-03-07

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OK~~~

DoomGuardian 2010-07-01

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怎么看不了啊

zjhappy520 2008-09-02

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24楼,太谢谢你了, 不过你也来得太晚了点啊. 早点来那就爱死你了.

zt_100094 2008-08-29

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private PrinterStatus GetPrinterStat(string PrinterDevice)
{
PrinterStatus ret = 0;
string path = @"win32_printer.DeviceId='" + PrinterDevice + "'";
ManagementObject printer = new ManagementObject(path);
printer.Get();
ret = (PrinterStatus)Convert.ToInt32(printer.Properties["PrinterStatus"].Value);
return ret;
}

调用：
private void 打印预览ToolStripMenuItem_Click(object sender, EventArgs e)
{
foreach (string strPrinter in PrinterSettings.InstalledPrinters)
{
if (printDocument1.PrinterSettings.PrinterName == null)
{
MessageBox.Show("没有检测到已安装的打印机！", "警示");
}
else
{
printDocument1.PrinterSettings.PrinterName = strPrinter;
PrinterStatus nn = new PrinterStatus();
nn = GetPrinterStat(printDocument1.PrinterSettings.PrinterName);
if (nn.ToString() == "空闲")
{
try
{
if (InitializePrinting())
{
printPreviewDialog1.ShowDialog();
}

}
catch //(Exception excep)
{

MessageBox.Show("无法访问打印机！", "打印出错", MessageBoxButtons.OK, MessageBoxIcon.Error);
printDocument1.PrintController.OnEndPrint(printDocument1, new PrintEventArgs());
}

return;
}
}
}
}

zjhappy520 2008-08-29

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哎,楼上的代码,我都早就试过了.网上的资料,我可能是找完了吧..
顶啊,,帮帮大家帮帮忙啊.. 搞定了马上加分,结帖.

slimfeng 2008-08-29

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        private void button4_Click(object sender, EventArgs e)

        {

            listBox1.Items.Clear();

            foreach(String Name in System.Drawing.Printing.PrinterSettings.InstalledPrinters)

            {

                listBox1.Items.Add(Name);

            }

            

        }

//下面是据说可以找到所有，但我测试了一下不行，不太清楚"WinNT://servername/printqueuename"中servername以及printqueuename怎么设置   



        private void button5_Click(object sender, EventArgs e)

        {

              DirectoryEntry   printer   =   new   DirectoryEntry("WinNT://servername/printqueuename",   null,   null,   AuthenticationTypes.ServerBind);   

              listBox1.Items.Add(printer.Path);   

              System.DirectoryServices.PropertyCollection   pcoll   =   printer.Properties;   

              try   

              {   

                foreach(string   sc   in   pcoll.PropertyNames)   

                {   

                  listBox1.Items.Add(sc   +   ":\t"   +   (pcoll[sc])[0].ToString());

                } 

                listBox1.Items.Add("---------------------------------");   

              }   

              catch(COMException   ex)   

              {

                  listBox1.Items.Add(ex.Message);   

              }   

        }

zjhappy520 2008-08-29

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我这里不可以上QQ啊..郁闷死了. 大家帮帮忙啊, 昨天搞了半天, 急啊, 要不没饭碗了啊...

欧文 2008-08-29

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是啊,全是电脑名字啊

hm7921936 2008-08-29

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zjhappy520 2008-08-29

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4楼,你的代码怎么是把所有电脑名都查出来了.

chenyijiu 2008-08-29

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贴段能用的，查找网络打印机







public class MyEnumPrintersClass

    {

        [FlagsAttribute]

        public enum PrinterEnumFlags

        {

            PRINTER_ENUM_DEFAULT = 0x00000001,

            PRINTER_ENUM_LOCAL = 0x00000002,

            PRINTER_ENUM_CONNECTIONS = 0x00000004,

            PRINTER_ENUM_FAVORITE = 0x00000004,

            PRINTER_ENUM_NAME = 0x00000008,

            PRINTER_ENUM_REMOTE = 0x00000010,

            PRINTER_ENUM_SHARED = 0x00000020,

            PRINTER_ENUM_NETWORK = 0x00000040,

            PRINTER_ENUM_EXPAND = 0x00004000,

            PRINTER_ENUM_CONTAINER = 0x00008000,

            PRINTER_ENUM_ICONMASK = 0x00ff0000,

            PRINTER_ENUM_ICON1 = 0x00010000,

            PRINTER_ENUM_ICON2 = 0x00020000,

            PRINTER_ENUM_ICON3 = 0x00040000,

            PRINTER_ENUM_ICON4 = 0x00080000,

            PRINTER_ENUM_ICON5 = 0x00100000,

            PRINTER_ENUM_ICON6 = 0x00200000,

            PRINTER_ENUM_ICON7 = 0x00400000,

            PRINTER_ENUM_ICON8 = 0x00800000,

            PRINTER_ENUM_HIDE = 0x01000000

        }

        

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

        public struct PRINTER_INFO_1

        {

            int flags;

            [MarshalAs(UnmanagedType.LPTStr)]

            public string pDescription;

            [MarshalAs(UnmanagedType.LPTStr)]

            public string pName;

            [MarshalAs(UnmanagedType.LPTStr)]

            public string pComment;

        }



        [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]

        static extern bool EnumPrinters(PrinterEnumFlags Flags, string Name, uint Level, IntPtr pPrinterEnum, uint cbBuf, ref uint pcbNeeded, ref uint pcReturned);



        private const int ERROR_INSUFFICIENT_BUFFER = 122;



        public static PRINTER_INFO_1[] MyEnumPrinters(PrinterEnumFlags Flags)

        {

            uint cbNeeded = 0;

            uint cReturned = 0;

            IntPtr pPrInfo4 = IntPtr.Zero;

            uint size = 0;



            if (EnumPrinters(Flags, null, 1, IntPtr.Zero, size, ref cbNeeded, ref cReturned))

            {

                return new PRINTER_INFO_1[]{};

            }

            if (cbNeeded != 0)

            {

                pPrInfo4 = Marshal.AllocHGlobal((int)cbNeeded + 128);

                size = cbNeeded + 128;

                EnumPrinters(Flags, null, 1, pPrInfo4, size, ref cbNeeded, ref cReturned);

                if (cReturned != 0)

                {

                    PRINTER_INFO_1[] printerInfo1 = new PRINTER_INFO_1[cReturned];

                    int offset = pPrInfo4.ToInt32();

                    Type type = typeof(PRINTER_INFO_1);

                    int increment = Marshal.SizeOf(type);

                    for (int i = 0; i < cReturned; i++)

                    {

                        printerInfo1[i] = (PRINTER_INFO_1)Marshal.PtrToStructure(new IntPtr(offset), type);

                        offset += increment;

                    }

                    Marshal.FreeHGlobal(pPrInfo4);

                    return printerInfo1;

                }

            }



           return new PRINTER_INFO_1[]{};

        }

        public static void  Main(String[] args)

        {

            PRINTER_INFO_1[] printers = MyEnumPrinters(PrinterEnumFlags.PRINTER_ENUM_REMOTE);

            foreach (PRINTER_INFO_1 printer in printers)

            {

                if (-1 == printer.pName.IndexOf("!!"))

                {

                    Console.WriteLine(printer.pName);

                }

                else

                {

                    uint cbNeeded = 0;

                    uint cReturned = 0;

                    IntPtr pPrInfo4 = IntPtr.Zero;

                    uint size = 0;

                    string pNewName = printer.pName;

                    EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_NAME, pNewName, 1, IntPtr.Zero, size, ref cbNeeded,ref cReturned);

                    if (cbNeeded != 0)

                    {

                        pPrInfo4 = Marshal.AllocHGlobal((int)cbNeeded + 128);

                        size = cbNeeded + 128;

                        EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_NAME, pNewName, 1, pPrInfo4, size, ref cbNeeded, ref cReturned);

                        PRINTER_INFO_1[] printerInfo1 = new PRINTER_INFO_1[cReturned];

                        int offset = pPrInfo4.ToInt32();

                        Type type = typeof(PRINTER_INFO_1);

                        int increment = Marshal.SizeOf(type);

                        for (int i = 0; i < cReturned; i++)

                        {

                            printerInfo1[i] = (PRINTER_INFO_1)Marshal.PtrToStructure(new IntPtr(offset), type);

                            offset += increment;

                            Console.WriteLine(printerInfo1[i].pName);

                        }

                        Marshal.FreeHGlobal(pPrInfo4);

                    }

                }

            }

        }

    }

zjhappy520 2008-08-29

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20楼, 为什么你说的我完全看不懂. SNMP源代码在哪里可以下啊. 你不能帮人帮到底吗, 做个例子出来..谢谢了啊.

sxmonsy 2008-08-29

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顶下楼上的

sxmonsy 2008-08-29

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顶下楼上的

lextm 2008-08-29

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#SNMP源代码里面自带的例子有一个TestDiscovery的，是用来查看当前局域网中支持SNMP设备用的例子。你可以看看你当前局域网内有哪些机器支持SNMP的。以我的网络为例，从显示出的名字还可以看出哪些是HP的打印机来。但是最好可以用打印机专有的对象来看，而不是简单的sysDesc。

最主要是看起来你对于TCP/IP，SNMP都不是太了解，我也不能打包票你一个钟头就搞定吧。

zjhappy520 2008-08-29

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不明白, 有没有代码示例啊.. 谢谢了...帮帮忙啊今天又过去半天了..

lextm 2008-08-29

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使用一点SNMP就可以。需要使用我开发的#SNMP。http://www.codeplex.com/sharpsnmplib

通过GetRequestMessage.Broadcast函数向255.255.255.255或者其他广播IP发送只有打印机支持的SNMP对象请求，就可以得出局域网内哪些设备是可用的打印机。不过这需要该类型的打印机支持SNMP。

zjhappy520 2008-08-29