Вы можете использовать статический метод GetFullPath класса Path:
Dim fileName As string = "myfile.ext"
Dim path1 As string = "mydir"
Dim path2 As string = "\mydir"
Dim fullPath As string
fullPath = Path.GetFullPath(path1)
Console.WriteLine("GetFullPath('{0}') returns '{1}'", _
path1, fullPath)
fullPath = Path.GetFullPath(fileName)
Console.WriteLine("GetFullPath('{0}') returns '{1}'", _
fileName, fullPath)
fullPath = Path.GetFullPath(path2)
Console.WriteLine("GetFullPath('{0}') returns '{1}'", _
path2, fullPath)
' Output is based on your current directory, except
' in the last case, where it is based on the root drive
' GetFullPath('mydir') returns 'C:\temp\Demo\mydir'
' GetFullPath('myfile.ext') returns 'C:\temp\Demo\myfile.ext'
' GetFullPath('\mydir') returns 'C:\mydir'
Пример из MSDN .
Другой способ - использовать свойство fullName класса FileInfo (унаследованного от FileSystemInfo), см. Использование ниже:
Sub DisplayFileSystemInfoAttributes(ByVal fsi As FileInfo)
' Assume that this entry is a file.
Dim entryType As String = "File"
' Determine if this entry is really a directory.
If fsi.Attributes = FileAttributes.Directory Then
entryType = "Directory"
End If
' Show this entry's type, name, and creation date.
Console.WriteLine("{0} entry {1} was created on {2:D}", _
entryType, **fsi.FullName**, fsi.CreationTime)
End Sub
С MSDN .