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''' <summary>
''' Searches a path and determines if it is relative.
''' </summary>
''' <param name="pszPath">A pointer to a null-terminated string of maximum length MAX_PATH that contains the path to search.</param>
''' <returns>Returns TRUE if the path is relative, or FALSE if it is absolute.</returns>
<DllImport("shlwapi.dll", EntryPoint:="PathIsRelativeW", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Public Function PathIsRelative(<MarshalAs(UnmanagedType.LPTStr)>pszPath As String) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
VB Signature:
'THIS IS UNTESTED!!!
Private Declare Function PathIsRelative Lib "shlwapi" _
Alias "PathIsRelativeA" (ByVal pszPath As String) As Long
User-Defined Types:
None.
Alternative Managed API:
The '''Path.IsPathRooted''' function works the same, but the return value is opposite.
It returns '''true''' for an absolute path, and '''false''' for a relative path.
<DllImport("shlwapi.dll", EntryPoint:="PathIsRelativeW", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Public Function PathIsRelative(<MarshalAs(UnmanagedType.LPTStr)>pszPath As String) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
Public Shared Function IsRelativePath(path As String) As Boolean
Return PathIsRelative(path)
End Function
'nunit test
<Test> _
Public Sub TestIsRelative()
Assert.AreEqual(true,IsRelativePath("test.txt"),"Test 1")
Assert.AreEqual(true, IsRelativePath("..\test.txt"), "Test 2")
Assert.AreEqual(true, IsRelativePath("..\..\test.txt"), "Test 3")
Assert.AreEqual(false, IsRelativePath("C:\test.txt"), "Test 4")
End Sub
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