将路径转换为UNC路径

我曾尝试这个代码到我的路径转换为UNC路径：将路径转换为UNC路径

[DllImport("mpr.dll", CharSet = CharSet.Unicode)] 
[return:MarshalAs(UnmanagedType.U4)] 
static extern int WNetGetUniversalName(
    string lpLocalPath, 
    [MarshalAs(UnmanagedType.U4)] int dwInfoLevel, 
    IntPtr lpBuffer, 
    [MarshalAs(UnmanagedType.U4)] ref int lpBufferSize); 

const int UNIVERSAL_NAME_INFO_LEVEL = 0x00000001; 
const int REMOTE_NAME_INFO_LEVEL = 0x00000002; 

const int ERROR_MORE_DATA = 234; 
const int NOERROR = 0;  

static string GetUniversalName(string localPath) 
{ 
    // The return value. 
    string retVal = null ; 

    // The pointer in memory to the structure. 
    IntPtr buffer = IntPtr.Zero; 

    // Wrap in a try/catch block for cleanup. 
    try 
    { 
     // First, call WNetGetUniversalName to get the size. 
     int size = 0; 

     // Make the call. 
     // Pass IntPtr.Size because the API doesn't like null, even though 
     // size is zero. We know that IntPtr.Size will be 
     // aligned correctly. 
     int apiRetVal = WNetGetUniversalName(localPath, UNIVERSAL_NAME_INFO_LEVEL, (IntPtr) IntPtr.Size, ref size); 

     // If the return value is not ERROR_MORE_DATA, then 
     // raise an exception. 
     if (apiRetVal != ERROR_MORE_DATA) 
      // Throw an exception. 
      throw new Win32Exception(apiRetVal); 

     // Allocate the memory. 
     buffer = Marshal.AllocCoTaskMem(size); 

     // Now make the call. 
     apiRetVal = WNetGetUniversalName(localPath, UNIVERSAL_NAME_INFO_LEVEL, buffer, ref size); 

     // If it didn't succeed, then throw. 
     if (apiRetVal != NOERROR) 
      // Throw an exception. 
      throw new Win32Exception(apiRetVal); 

     // Now get the string. It's all in the same buffer, but 
     // the pointer is first, so offset the pointer by IntPtr.Size 
     // and pass to PtrToStringAnsi. 
     retVal = Marshal.PtrToStringAuto(new IntPtr(buffer.ToInt64() + IntPtr.Size), size); 
     retVal = retVal.Substring(0, retVal.IndexOf('\0')); 
    } 
    finally 
    { 
     // Release the buffer. 
     Marshal.FreeCoTaskMem(buffer); 
    } 

    // First, allocate the memory for the structure. 

    // That's all folks. 
    return retVal; 
}

但是当我发送给此方法的路径\\myservername\sharedfoldername我收到此错误：

The specified device name is not valid.

我的错误是什么？

来源

2011-12-12 M_Mogharrabi

似乎有点不公平投票这篇文章下来...这家伙只是不知道如何使用此代码，并要求像堆栈溢出其他人一样的帮助。 – Sheridan

谢谢谢里登。 –

从MSDN（重点煤矿）：

The WNetGetUniversalName function takes a drive-based path for a network resource and returns an information structure that contains a more universal form of the name.

你传递一个UNC路径，但该函数需要基于驱动器的路径（即像X:\foo\bar），并随后将返回 UNC路径。

来源

2011-12-12 10:19:09 Arnout

谢谢，那么我应该怎么做才能获得我的路径的UNC路径？有没有什么方法？ –

我不明白你的问题......'\\ myservername \ sharedfoldername' *是一个UNC路径。你到底想做什么？ – Arnout

我在这个路径中有一个文件，我想在autocad中打开它，但我收到了这个错误：“File \\ servername \ sharedfoldername \ protectedfoldername \ File1.dwg”找不到。有人告诉我将我的路径转换为UNC version.Please帮我吗？ –

The specified device name is not valid.

至于我还记得，当WNetGetUniversalName（）得到本地驱动器的路径，它也返回ERROR_BAD_DEVICE_PATH。

因此，三年前，我了解了如下的返回代码;

ERROR_BAD_DEVICE_PATH :
Please check whether the path is really needed to change into UNC name or not.

来源

2014-01-11 14:34:56 user3185242

将路径转换为UNC路径

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