Get the owner of a file in VB.NET


Get the owner of a file in VB.NET



I have encountered a error in VB.NET when I want to get the owner of a file.



This is my code.


Imports System.Security.AccessControl
Imports System.Security.Principal
Imports System.IO
Dim fi As FileInfo = New FileInfo("X:Tempaa.txt")
Dim fs As FileSecurity = fi.GetAccessControl
Dim myuser As IdentityReference = fs.GetOwner(GetType(NTAccount))
Dim username = myuser.Value.ToString



and I got error:


System.Security.Principal.IdentityNotMappedException was caught
HResult=-2146233087
Message=Unable to translate some or all of the recognition references。
Source=mscorlib
StackTrace:
System.Security.Principal.SecurityIdentifier.Translate(IdentityReferenceCollection sourceSids, Type targetType, Boolean forceSuccess)
in System.Security.Principal.SecurityIdentifier.Translate(Type targetType)
in System.Security.AccessControl.ObjectSecurity.GetOwner(Type targetType)
in Ts2.From1.Button1_Click(Object sender, EventArgs e) 於 D:Ts3Ts1Form1.vb: row 292
InnerException:





Do these help ? blogs.msdn.microsoft.com/winsdk/2013/12/18/… or stackoverflow.com/questions/3324831/identitynotmappedexception
– Andrew Mortimer
2 days ago





yes,It's about AccountName...I change the computer to the same Domain,then, It's run!
– eason
2 days ago





That is a pretty normal mishap with mapped drive letters like X: You may well find an owner whose name is not known to your local OS. Ultimately it is a network configuration problem, domains are important.
– Hans Passant
2 days ago




1 Answer
1



ypu can easily get the owner of a file or folder using this ...


Public Function GetFileOwner(ByVal fileName As String) As String
Try
Dim fi As New FileInfo(fileName)
Dim fs As System.Security.AccessControl.FileSecurity = fi.GetAccessControl
Dim owner As System.Security.Principal.NTAccount = CType(fs.GetOwner(GetType(System.Security.Principal.NTAccount)), System.Security.Principal.NTAccount)
Return owner.ToString
Catch ex As Exception
Return ""
End Try
End Function


Public Function GetDirOwner(ByVal fileName As String) As String
Try
Dim di As New DirectoryInfo(fileName)
Dim ds As System.Security.AccessControl.DirectorySecurity = di.GetAccessControl
Dim owner As System.Security.Principal.NTAccount = CType(ds.GetOwner(GetType(System.Security.Principal.NTAccount)), System.Security.Principal.NTAccount)
Return owner.ToString
Catch ex As Exception
Return ""
End Try
End Function






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