我正在开发一款C#应用程序，需要在局域网中发现计算机和打印机。我该如何从.NET中实现这个功能？是否有任何.NET框架中可用的类可以使用？感谢您的回答。
3个回答
3
您可以使用DirectoryServices获取计算机。
System.DirectoryServices.DirectoryEntry winNtDirectoryEntries = new System.DirectoryServices.DirectoryEntry("WinNT:");
List<String> computerNames = (from DirectoryEntry availDomains in winNtDirectoryEntries.Children
from DirectoryEntry pcNameEntry in availDomains.Children
where pcNameEntry.SchemaClassName.ToLower().Contains("computer")
select pcNameEntry.Name).ToList();
- Ralf de Kleine
0
这可能会对你有所帮助：http://www.codeproject.com/Articles/16113/Retreiving-a-list-of-network-computer-names-using
using System;
using System.Runtime.InteropServices;
using System.Security;
using System.Collections;
namespace ListNetworkComputers
{
#region NetworkBrowser CLASS
/// <summary>
/// Provides a mechanism for supplying
// a list of all PC names in the local network.
/// This collection of PC names is used in the form
///
/// This class makes use of a DllImport instruction.
/// The purpose of which is as follows:
/// When a DllImport declaration is made
/// in managed code (C#) it is a call to a legacy
/// unmanaged code module, normally
/// a C++ Dynamic Link Library. These C++ Dll's are
/// usually part of the operating system API,
/// or some other vendors API, and must be
/// used to carry out operations that are not
/// native within the managed code C# framework.
/// This is fairly normal within the windows world.
/// The only thing that needs careful consideration
/// is the construction of the correct type of STRUCTS,
/// object pointers, and attribute markers,
/// which all contribute to making the link
/// between managed (C#) and unmanaged code (C++)
/// more seamless
///
/// This class makes use of the following Dll calls
/// <list type="bullet">
/// <item>
/// <description> Netapi32.dll : NetServerEnum,
/// The NetServerEnum function lists all servers
/// of the specified type that are visible in
/// a domain. For example, an application can call
/// NetServerEnum to list all domain controllers
/// only or all SQL servers only.
/// You can combine bit masks to list several
/// types. For example, a value of 0x00000003
/// combines the bit masks for SV_TYPE_WORKSTATION
/// (0x00000001) and SV_TYPE_SERVER (0x00000002).
/// </description>
/// </item>
/// <item>
/// <description> Netapi32.dll : NetApiBufferFree,
/// The NetApiBufferFree function frees
/// the memory that the NetApiBufferAllocate
/// function allocates. Call NetApiBufferFree
/// to free the memory that other network
/// management functions return.</description>
/// </item>
/// </list>
/// </summary>
public sealed class NetworkBrowser
{
#region Dll Imports
//declare the Netapi32 : NetServerEnum method import
[DllImport("Netapi32", CharSet = CharSet.Auto,
SetLastError = true),
SuppressUnmanagedCodeSecurityAttribute]
/// <summary>
/// Netapi32.dll : The NetServerEnum function lists all servers
/// of the specified type that are
/// visible in a domain. For example, an
/// application can call NetServerEnum
/// to list all domain controllers only
/// or all SQL servers only.
/// You can combine bit masks to list
/// several types. For example, a value
/// of 0x00000003 combines the bit
/// masks for SV_TYPE_WORKSTATION
/// (0x00000001) and SV_TYPE_SERVER (0x00000002)
/// </summary>
public 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
);
//declare the Netapi32 : NetApiBufferFree method import
[DllImport("Netapi32", SetLastError = true),
SuppressUnmanagedCodeSecurityAttribute]
/// <summary>
/// Netapi32.dll : The NetApiBufferFree function frees
/// the memory that the NetApiBufferAllocate function allocates.
/// Call NetApiBufferFree to free
/// the memory that other network
/// management functions return.
/// </summary>
public static extern int NetApiBufferFree(
IntPtr pBuf);
//create a _SERVER_INFO_100 STRUCTURE
[StructLayout(LayoutKind.Sequential)]
public struct _SERVER_INFO_100
{
internal int sv100_platform_id;
[MarshalAs(UnmanagedType.LPWStr)]
internal string sv100_name;
}
#endregion
#region Public Constructor
/// <SUMMARY>
/// Constructor, simply creates a new NetworkBrowser object
/// </SUMMARY>
public NetworkBrowser()
{
}
#endregion
#region Public Methods
/// <summary>
/// Uses the DllImport : NetServerEnum
/// with all its required parameters
/// (see http://msdn.microsoft.com/library/default.asp?
/// url=/library/en-us/netmgmt/netmgmt/netserverenum.asp
/// for full details or method signature) to
/// retrieve a list of domain SV_TYPE_WORKSTATION
/// and SV_TYPE_SERVER PC's
/// </summary>
/// <returns>Arraylist that represents
/// all the SV_TYPE_WORKSTATION and SV_TYPE_SERVER
/// PC's in the Domain</returns>
public ArrayList getNetworkComputers()
{
//local fields
ArrayList networkComputers = new ArrayList();
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
{
//call the DllImport : NetServerEnum
//with all its required parameters
//see http://msdn.microsoft.com/library/
//default.asp?url=/library/en-us/netmgmt/netmgmt/netserverenum.asp
//for full details of method signature
int ret = NetServerEnum(null, 100, ref buffer,
MAX_PREFERRED_LENGTH,
out entriesRead,
out totalEntries, SV_TYPE_WORKSTATION |
SV_TYPE_SERVER, null, out
resHandle);
//if the returned with a NERR_Success
//(C++ term), =0 for C#
if (ret == 0)
{
//loop through all SV_TYPE_WORKSTATION
//and SV_TYPE_SERVER PC's
for (int i = 0; i < totalEntries; i++)
{
//get pointer to, Pointer to the
//buffer that received the data from
//the call to NetServerEnum.
//Must ensure to use correct size of
//STRUCTURE to ensure correct
//location in memory is pointed to
tmpBuffer = new IntPtr((int)buffer +
(i * sizeofINFO));
//Have now got a pointer to the list
//of SV_TYPE_WORKSTATION and
//SV_TYPE_SERVER PC's, which is unmanaged memory
//Needs to Marshal data from an
//unmanaged block of memory to a
//managed object, again using
//STRUCTURE to ensure the correct data
//is marshalled
_SERVER_INFO_100 svrInfo = (_SERVER_INFO_100)
Marshal.PtrToStructure(tmpBuffer,
typeof(_SERVER_INFO_100));
//add the PC names to the ArrayList
networkComputers.Add(svrInfo.sv100_name);
}
}
}
catch (Exception ex)
{
return null;
}
finally
{
//The NetApiBufferFree function frees
//the memory that the
//NetApiBufferAllocate function allocates
NetApiBufferFree(buffer);
}
//return entries found
return networkComputers;
}
#endregion
}
#endregion
}
用法:
static void Main(string[] args)
{
ListNetworkComputers.NetworkBrowser browser = new ListNetworkComputers.NetworkBrowser();
ArrayList networks = browser.getNetworkComputers();
foreach(object item in networks)
{
Console.WriteLine(item.ToString());
}
Console.Read();
}
- Hanlet Escaño
1
这可能有所帮助，但我期望有一个更简洁的解决方案，即.NET内部的解决方案。难道在.NET框架内真的没有解决方案吗？ - user2220535
0
我不确定你尝试了什么，也不知道你的目标是什么。你可以通过以下方式实现：
- 启动一个
Process来调用批处理文件或PowerShell脚本。 - 实现
DirectoryServices.dll。
如果你在Workgroup中实现了以上内容。
using (DirectoryEntry workgroup = new DirectoryEntry("WinNT://Workgroup"))
{
foreach (DirectoryEntry childEntry in workgroup.Children)
{
Console.WriteLine(child.Name);
}
}
这将允许您针对特定的工作组进行测试。一个针对整个域进行测试的示例可能如下：
using (DirectoryEntry domain = new DirectoryENtry("LDAP://" + domainName))
{
domain.Children.SchemaFilter.Add("computer");
foreach (DirectoryEntry d in domain.Childern)
{
Console.WriteLine(d.Name);
}
}
正如你所看到的，你在這裡有相當大的靈活性。顯然你可以為一個批次文件實現一個執行 Netview 的Process。這是非常基本的。
另一個選擇是Powershell。它可以訪問WMI，因此您可以獲取大量信息。此外，由於眾多IT社區依賴它，有很多可用來完成此任務的腳本。
希望這能有所幫助。
- Greg
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