在项目中,将本地C盘的一个文件夹使用subst命令映射成了X盘,在C#代码中需要获取这个X盘在C盘中的真实路径。但是在C#中并没有找到相应的接口来获取这个结果,或许是我没有找到。在DOS中有命令subst,可以显示所有被映射的虚拟驱动盘,所以或许可以使用C#执行DOS命令来获取相应的结果。执行结果如图所示。
在这里封装了一个方法,可以用于执行任何的DOS命令,并且返回结果字符串。
public string Execute(string dosCommand, int milliseconds) { string output = ""; //输出字符串 if (dosCommand != null && dosCommand != "") { Process process = new Process(); //创建进程对象 ProcessStartInfo startInfo = new ProcessStartInfo(); startInfo.FileName = "cmd.exe"; //设定需要执行的命令 startInfo.Arguments = "/C " + dosCommand; //设定参数,其中的“/C”表示执行完命令后马上退出 startInfo.UseShellExecute = false; //不使用系统外壳程序启动 startInfo.RedirectStandardInput = false; //不重定向输入 startInfo.RedirectStandardOutput = true; //重定向输出 startInfo.CreateNoWindow = true; //不创建窗口 process.StartInfo = startInfo; try { if (process.Start()) //开始进程 { if (milliseconds == 0) process.WaitForExit(); //这里无限等待进程结束 else process.WaitForExit(milliseconds); //当超过这个毫秒后,不管执行结果如何,都不再执行这个DOS命令 output = process.StandardOutput.ReadToEnd();//读取进程的输出 } } catch { } finally { if (process != null) process.Close(); } } return output; } string result = Execute("subst", 1000);
补充说明:
subts只是显示本地目录映射后的驱动器,如果是服务器上的目录映射到了本地,可以使用net use命令。但是更方便的是,C#中有相应的针对于获取网络驱动器真实路径的接口方法。net use结果截图
这里是C#中相关的代码
[DllImport("mpr.dll", CharSet = CharSet.Unicode, SetLastError = true)] public static extern int WNetGetConnection( [MarshalAs(UnmanagedType.LPTStr)] string localName, [MarshalAs(UnmanagedType.LPTStr)] StringBuilder remoteName, ref int length); /// <summary> /// Given a path, returns the UNC path or the original. (No exceptions /// are raised by this function directly). For example, "P:\2008-02-29" /// might return: "\\networkserver\Shares\Photos\2008-02-09" /// </summary> /// <param name="originalPath">The path to convert to a UNC Path</param> /// <returns>A UNC path. If a network drive letter is specified, the /// drive letter is converted to a UNC or network path. If the /// originalPath cannot be converted, it is returned unchanged.</returns> public string GetPathForMappedDriveFile(string originalPath) { StringBuilder sb = new StringBuilder(512); int size = sb.Capacity; // look for the {LETTER}: combination ... if (originalPath.Length > 2 && originalPath[1] == ':') { // don't use char.IsLetter here - as that can be misleading // the only valid drive letters are a-z && A-Z. char c = originalPath[0]; if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) { int error = WNetGetConnection(originalPath.Substring(0, 2), sb, ref size); if (error == 0) { DirectoryInfo dir = new DirectoryInfo(originalPath); string path = Path.GetFullPath(originalPath) .Substring(Path.GetPathRoot(originalPath).Length); return Path.Combine(sb.ToString().TrimEnd(), path); } } } return originalPath; }另外在编写有关驱动盘信息的代码时候可能会用到的方法,查询本机上所有的驱动器的信息。
//这句代码从系统中获取所有的硬盘信息,是系统自带的方法
SelectQuery selectQuery = new SelectQuery("select * from win32_logicaldisk");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(selectQuery);
int i = 0;
StringBuilder builder = new StringBuilder();
foreach (ManagementObject disk in searcher.Get())
{
//硬盘类型,4为网络驱动器,3为本地驱动器,这里本地目录映射的磁盘也会当成本地驱动器看待,5为光盘驱动器
string DriveType = disk["DriveType"].ToString();
string DriveName = disk["Name"].ToString();
builder.Append(DriveType + "/" + DriveName);
}