I want to create a file and give a user write permission.
IO.File.Create(Path & "\test.json")
Dim fs As Security.AccessControl.FileSecurity = IO.File.GetAccessControl(Path & "\test.json")
Dim far As Security.AccessControl.FileSystemAccessRule = New Security.AccessControl.FileSystemAccessRule("DOMAIN\USER", Security.AccessControl.FileSystemRights.WriteData, Security.AccessControl.AccessControlType.Allow)
fs.AddAccessRule(far)
When I check the Security tab for this file, I see no changes. VS2015 output window does not show any exceptions. VS2015 is running as Administrator.
I used this for reference: https://msdn.microsoft.com/en-us/library/d49cww7f(v=vs.110).aspx
All you have changed in your code is the in-memory file security. In order to apply these changes to the file, you must call SetAccessControl.
For example:
File.SetAccessControl(Path & "\test.json", fs)
Related
I'm creating a html page that will import an excel file in to a tracking system. On a button click event excel file is located / ssis package is fired / data imported then closed out. Thats the idea work flow. Problem is the excel file access is being denied before the package even executes
Here is the exact error :
I've tried :
excel file properties have been shared to everyone
identity impersonate set to true
hard coding the path
here is the VB code
Protected Sub bntExecute_Click(sender As Object, e As EventArgs) Handles btnExecute.Click
Dim app As Application = New Application()
Dim package As Package = Nothing
'Dim fileName As String = "C:\Users\Desktop\T. Bryant III\PTSID_Update_Template"'
Try
Dim fileName As String = Server.MapPath(System.IO.Path.GetFileName(FileUpload1.PostedFile.FileName.ToString()))
FileUpload1.PostedFile.SaveAs(fileName)
package = app.LoadPackage("#C:\Users\Desktop\T.Bryant III\KitImport", Nothing)
'excel connection from package'
package.Connections("SourceConnectionExcel").ConnectionString = "provider=Microsoft.Jet.OLEDB.4.0data source =" + fileName + "Extended Properties = Excel 8.0"
'Execute the pakage'
Dim results As Microsoft.SqlServer.Dts.Runtime.DTSExecResult = package.Execute()
Catch ex As Exception
Throw ex
Finally
package.Dispose()
package = Nothing
End Try
End Sub
Thanks in advance or if there is an easier way to do this please let me know. The package when executing it in ssis works fine with its own connection manager etc.
A few things to try. If they don't work for you as permanent solutions, they should at least confirm that your code is working and you are dealing with a persmissions issue (which appears to be the case).
Move your file to the public folder (C:\Users\Public).
Run your application (or web browser) as an administrator (if applicable to your version of Windows).
If you are using a web browser, try using a different one.
If nothing else works, try pasting your code into a Windows Form Application.
If you still get the same error after trying all of this, it's time to take another look at your code. Remove the Try/Catch block to determine precisely which line is throwing the error. If you've tried hard coding, I'm guessing it's the SaveAs method. I'm not sure what class FileUpload1 is, but some SaveAs methods won't overwrite existing files unless you explicitly tell them to. Check the appropriate documentation and see if you don't need to pass a True value somewhere along with filename.
Update us with the results. At the very least, this should narrow down your problem and allow for a better diagnosis of it.
I have recently started getting System.UnauthorizedAccessException errors when using File.AppendAllText to write to a shared drive on the network. I think there were some changes to the network when this happened. The code in my application hasn't changed.
I have asked our IT dept to grant me full permission to the folder. I can see I have permissions for Modify, Read & Execute, Read, Write under my username if I navigate to the file and look at the Security tab under properties. I am also part of a group with read, write and modify permissions to the folder.
This works without error in the same folder:
File.WriteAllText(myFile, myText)
This generates a System.UnauthorizedAccessException error when it reaches the AppendallText:
If File.Exists(myFile) = False Then
' Create a file to write to.
Dim createText As String = logTime & " " & report_data
File.WriteAllText(myFile, createText)
Else
Dim appendText As String = logTime & " " & report_data
File.AppendAllText(myFile, appendText)
End If
I have tried deleting the file and creating it again, that made no difference.
I tried File.SetAttributes(myFile, FileAttributes.Normal)
The IT dept can't see what the problem is.
I can manually open, change and modify the file. The problem only arises if I am trying to do this programmatically.
Is there a different 'user' which tries to modify files? Could the file be open somehow, or would that generate a different error?
I'm using VB.NET 2012, .net framework 4.5, Windows 8.1
The network changes were the problem. It doesn't seem possible to resolve this as it is. Instead I made a copy of the text data, append my new text to that, delete the file, and save the updated text to a new file.
I am having trouble deleting files after calling the GetPrivateProfileString command. I have the following code:
'Read the INI File
sb = New StringBuilder(500)
Select Case FileType
Case "Scanner File"
res = GetPrivateProfileString("ScannerSetings", "ScannerType", "", sb, sb.Capacity, Filename)
Case "Scale File"
res = GetPrivateProfileString("ScaleSetings", "ScaleType", "", sb, sb.Capacity, Filename)
End Select
'If the result is a value store it, otherwise move it to unprocessed
If res <> 0 Then InputArray.Add(sb.ToString)
File.Delete(Filename)
After reading the details from the INI file, as soon as I try to delete the file, I am getting the following error: The process cannot access the file 'R:\Drop\011_11_Scanner' because it is being used by another process.
I cannot even delete these files manually until I exit my application.
Any help would be appreciated.
Thanks
I cannot even delete these files manually until I exit my application.
This clearly shows that the file that Filename points to is locked. As long as it's locked, you won't be able to delete it.
Check your code for any file handles you have opened (eg for writing purposes) and did not close.
If you don't close a file after you've opened it, the file is not released and remains in locked state… which practically means it can not be deleted until (a) you close that file-handle, or (b) you close your program, since that's what's holding the file-handle after opening.
EDIT
The next thing that comes to mind is that VB.NET may need special user access rights to remove the INI on recent Windows versions. You can quickly cross-check that by simply executing your application with elevated user rights (eg via right-click menu; run as admin). I can't imagine that that's actually the problem — but it's worth a shot. Should it indeed be the problem, check (and modify) the permissions on the folder your application and/or INI resides in.
I have a class library which reads the XML file.
I am using VS 2012 and VB.NET language.
I am getting confused about how to read the file which is in folder of a application itself.
Right now I have given the path as
Dim reader As XmlTextReader = New XmlTextReader("C:\mailpara.xml")
but its hard-coded , but I want to make a folder in app. and want to read from that
folder itself.
I want to know how to read the file from the folder of a application.
How to read the file after installation on client's machine and how to add the file while making the set up ?
Use something like;
Dim directory as String = My.Application.Info.DirectoryPath
Dim reader As XmlTextReader = New XmlTextReader(directory & "\MyFolderName\mailpara.xml")
You can use Application.StartupPath property to retrieve the startup path of the application.
Dim reader As XmlTextReader = New XmlTextReader(Application.StartupPath & "mailpara.xml")
You might want to add a check to ensure that the path ends with a \ (I think it may or may not be present depending on whether the path is a root folder or not).
I have been searching the web looking for a way to open a WORD file from a secure network folder by impersonating a user who has access. The closest I've come to finding the answer was this from 2 years ago:
Impersonating in .net (C#) & opening a file via Process.start
Here is the code that I am using. When I set the arguments = LocalFile_Test, everything works perfectly because the user is accessing the local c:\ that is has access to. But when I set arguments = RemoteFile_Test, Word opens up a blank document which is the same effect as if I put garbage in the arguments. So it appears that it cannot find the file even though when I login with the user/domain/password that I specify in the properties below, I can find that exact file name and it is not empty. Does anything jump out at you right away? I appreciate your time.
Dim LocalFile_Test As String = "C:\New.docx"
Dim RemoteFile_Test As String = "\\Server1\Apps\File\New.docx"
Dim MyStartInfo As New System.Diagnostics.ProcessStartInfo
MyStartInfo.FileName = "C:\Program Files\Microsoft Office\Office12\WINWORD.exe "
MyStartInfo.Arguments = LocalFile_Test
MyStartInfo.LoadUserProfile = True
MyStartInfo.UseShellExecute = False
MyStartInfo.UserName = "specialuser"
MyStartInfo.Domain = "mydomainname"
MyStartInfo.Password = New System.Security.SecureString()
MyStartInfo.Password.AppendChar("p"c)
MyStartInfo.Password.AppendChar("a"c)
MyStartInfo.Password.AppendChar("s"c)
MyStartInfo.Password.AppendChar("s"c)
Process.Start(MyStartInfo)
My understanding is that you are trying to get a password protected file from a server, and when you do process start, it just opens up a blank word doc. I think the error is how you are trying to get the file, I think you have to map the actual physical path of the file on the server, like
System.Web.HttpContext.Current.Server.MapPath("\\Server1\Apps\File\New.docx")
From there, I am fairly certain, you need to create network credentials for the user like
System.Net.NetworkCredential=New NetworkCredential(userName:=, password:=)
Finally, once that is done, you can either write the file, or transmit the file like so...
System.Web.HttpContext.Current.Response.TransmitFile(file name)
System.Web.HttpContext.Current.Response.WriteFile(file name)
Then,once you get the file, you can try to open it with process start.
Hope that helps, let me know if what I said doesn't work.