我正在尝试列出我的应用程序中的所有本地驱动器,并DriveInfo.GetDrives
提供本地驱动器号,我也需要映射驱动器。
目前我有:C:,D:和G:(HDD),E:和F:(CD),以及S:和Z :(映射网络驱动器)。 (是的,它们在Windows资源管理器中以及Total Commander中都可见。) 但是只能以编程方式检索C,D,E,F,G。
我还尝试了Environment.GetLogicalDrives()
,GetLogicalDriveStrings (pInvoke)
,FindFirstVolume
和FindNextVolumen
(pInvoke)。我试图在注册表中找到映射的驱动器列表。没有任何作用,只有HDD和CD字母被检索。
没有任何异常,直接WinAPI调用中没有指示错误,现在我被卡住了。这是某种安全设置吗?在我看的每个地方,人们都说DriveInfo.GetDrives
应该回放映射的驱动器。这是真的吗?
我正在使用Vista Home Pro。应用程序从本地计算机运行,它也是使用Visual Studio 2008构建的。
我发布了我使用过的内容,但它很简单,我不能做错的事情:
foreach (System.IO.DriveInfo di in System.IO.DriveInfo.GetDrives())
Console.WriteLine(di.Name);
结果: C:\ d:\ E:\ F:\ G:\ 按任意键继续 。 。
我怎样才能让它发挥作用?
答案 0 :(得分:8)
好的,我发现了如何在Vista上获得断开连接的驱动器。不容易,但它是可行的:
首先,您需要以下WinAPI函数的pInvoke定义:
那些需要结构和一些枚举。
然后你需要多次调用它们,最后,你得到列表。 这是代码,要注意,它很长:
[DllImport("MPR.dll", CharSet = CharSet.Auto)]
static extern int WNetEnumResource(IntPtr hEnum, ref int lpcCount, IntPtr lpBuffer, ref int lpBufferSize);
[DllImport("MPR.dll", CharSet = CharSet.Auto)]
static extern int WNetOpenEnum(RESOURCE_SCOPE dwScope, RESOURCE_TYPE dwType, RESOURCE_USAGE dwUsage,
[MarshalAs(UnmanagedType.AsAny)][In] object lpNetResource, out IntPtr lphEnum);
[DllImport("MPR.dll", CharSet = CharSet.Auto)]
static extern int WNetCloseEnum(IntPtr hEnum);
public enum RESOURCE_SCOPE : uint
{
RESOURCE_CONNECTED = 0x00000001,
RESOURCE_GLOBALNET = 0x00000002,
RESOURCE_REMEMBERED = 0x00000003,
RESOURCE_RECENT = 0x00000004,
RESOURCE_CONTEXT = 0x00000005
}
public enum RESOURCE_TYPE : uint
{
RESOURCETYPE_ANY = 0x00000000,
RESOURCETYPE_DISK = 0x00000001,
RESOURCETYPE_PRINT = 0x00000002,
RESOURCETYPE_RESERVED = 0x00000008,
}
public enum RESOURCE_USAGE : uint
{
RESOURCEUSAGE_CONNECTABLE = 0x00000001,
RESOURCEUSAGE_CONTAINER = 0x00000002,
RESOURCEUSAGE_NOLOCALDEVICE = 0x00000004,
RESOURCEUSAGE_SIBLING = 0x00000008,
RESOURCEUSAGE_ATTACHED = 0x00000010,
RESOURCEUSAGE_ALL = (RESOURCEUSAGE_CONNECTABLE | RESOURCEUSAGE_CONTAINER | RESOURCEUSAGE_ATTACHED),
}
public enum RESOURCE_DISPLAYTYPE : uint
{
RESOURCEDISPLAYTYPE_GENERIC = 0x00000000,
RESOURCEDISPLAYTYPE_DOMAIN = 0x00000001,
RESOURCEDISPLAYTYPE_SERVER = 0x00000002,
RESOURCEDISPLAYTYPE_SHARE = 0x00000003,
RESOURCEDISPLAYTYPE_FILE = 0x00000004,
RESOURCEDISPLAYTYPE_GROUP = 0x00000005,
RESOURCEDISPLAYTYPE_NETWORK = 0x00000006,
RESOURCEDISPLAYTYPE_ROOT = 0x00000007,
RESOURCEDISPLAYTYPE_SHAREADMIN = 0x00000008,
RESOURCEDISPLAYTYPE_DIRECTORY = 0x00000009,
RESOURCEDISPLAYTYPE_TREE = 0x0000000A,
RESOURCEDISPLAYTYPE_NDSCONTAINER = 0x0000000B
}
[StructLayout(LayoutKind.Sequential)]
public struct NetResource
{
public RESOURCE_SCOPE dwScope;
public RESOURCE_TYPE dwType;
public RESOURCE_DISPLAYTYPE dwDisplayType;
public RESOURCE_USAGE dwUsage;
[MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPTStr)]
public string lpLocalName;
[MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPTStr)]
public string lpRemoteName;
[MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPTStr)]
public string lpComment;
[MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPTStr)]
public string lpProvider;
}
static System.Collections.Generic.Dictionary<string, NetResource> WNetResource(object resource)
{
System.Collections.Generic.Dictionary<string, NetResource> result = new System.Collections.Generic.Dictionary<string, NetResource>();
int iRet;
IntPtr ptrHandle = new IntPtr();
try
{
iRet = WNetOpenEnum(
RESOURCE_SCOPE.RESOURCE_REMEMBERED, RESOURCE_TYPE.RESOURCETYPE_DISK, RESOURCE_USAGE.RESOURCEUSAGE_ALL,
resource, out ptrHandle);
if (iRet != 0)
return null;
int entries = -1;
int buffer = 16384;
IntPtr ptrBuffer = Marshal.AllocHGlobal(buffer);
NetResource nr;
iRet = WNetEnumResource(ptrHandle, ref entries, ptrBuffer, ref buffer);
while ((iRet == 0) || (entries > 0))
{
Int32 ptr = ptrBuffer.ToInt32();
for (int i = 0; i < entries; i++)
{
nr = (NetResource)Marshal.PtrToStructure(new IntPtr(ptr), typeof(NetResource));
if (RESOURCE_USAGE.RESOURCEUSAGE_CONTAINER == (nr.dwUsage
& RESOURCE_USAGE.RESOURCEUSAGE_CONTAINER))
{
//call recursively to get all entries in a container
WNetResource(nr);
}
ptr += Marshal.SizeOf(nr);
result.Add(nr.lpLocalName, nr);
}
entries = -1;
buffer = 16384;
iRet = WNetEnumResource(ptrHandle, ref entries, ptrBuffer, ref buffer);
}
Marshal.FreeHGlobal(ptrBuffer);
iRet = WNetCloseEnum(ptrHandle);
}
catch (Exception)
{
}
return result;
}
public static System.Collections.Generic.Dictionary<string, NetResource> WNetResource()
{
return WNetResource(null);
}
你必须调用WNetResource(),然后你将获得驱动器列表。 (和蛋糕: - ))
答案 1 :(得分:5)
Environment.GetLogicalDrives()
和DriveInfo.GetDrives()
都返回了我的所有联网驱动器。
您的应用程序是否以其他用户身份运行(例如asp.net网站)?如果是,是否实际为该用户映射了驱动器?您可能会发现驱动器已为您映射,但它们实际上并未针对您的应用程序运行的用户进行映射。