How to prevent file from access if any file failed to write to a required folder - vb.net

I have 3 xml file to be written to a folder for client. while writing the 2 files got written perfectly but 3rd file failed. what are the ways by which I can prevent the client to open any file or all the files got deleted or locked if anything failed?

If your application has delete privileges on the system, keep a record of the filenames to the files you're writing. If a file fails for whatever reason, go through the list of file names and delete the files from the directory. A simple string list with a for loop should do it.

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How can I find if a file exists in the Microsoft Teams (SharePoint) environment using VBA?

I have created a file structure within Microsoft Teams to support a sales forecasting tool. VBA routines access and modify these files as appropriate. I would like to check if a file exists in a target directory before attempting to open it and then handle any missing files within VBA. I cannot find a way of doing something analogous to the Dir instruction, e.g.
If Len(Dir("c:\Filename.xlsx")) = 0 Then Msgbox "This file does NOT exist."
Substituting the URL returns error 52 "Bad file name".
Opening and saving files works fine, but if the file is not present, I only get a system error which I cannot handle within my environment.
If you sync the files locally, you can go on with Dir and local path instead of url.

How to set write permission to a single file in WiX

I have an MVC app and I need to set write permission to Everyone on a single file.
The file is generated on the fly during installation by a custom action script. The file itself is created inside the app folder.
I know the final path of the file, after the installation process
Online I've seen only examples for setting permission to folders and subfolders, none of them seemed to address my issue

Flowgear access to files on the local file system

I am creating a Flowgear workflow that needs to process a raft of XML data.
I have the xml data contained in a set of .xml files (approximately 400 files) in a folder on my local machine hard-drive and I want to read them into a workflow, run an XSLT transform and then write out the resultant XML to another folder on the same local hard-drive.
How do I get the flowgear workflow to read these files?
It depends on the use case, the File Enumerator works exceptionally well to loop (as in for-each) through each file. Sometimes, one wants to get a list of files in a particular folder and check whether a file has been found or not. For this, I would recommend a c# script to get a list of files with code:
Directory.GetFiles(#"{FilePath}", "*.{extension}", SearchOption.TopDirectoryOnly);
Further on, use the File node to read, write, or delete files from a file directory.
NB! You will need to install a DropPoint on the PC/Server to allow access to the files. For more information regarding Drop Points, please click here
You can use a File Enumerator or File Watcher to read the files up. The difference is that a File Enumerator will enumerate all files in a folder once, the File Watcher will watch a folder indefinitely and provide new files to the workflow as they are copied into the folder.
You can then use the File node to write the files back the the file system.

Empty files on S3 prevent from downloading using s3cmd and s3sync

I am trying to setup a backup/restore using S3. The upload sync worked well using s3sync. However, next to each folder there is an empty file with matching name. I read somewhere that this is created to define the folder structure but I am not sure about that as it doesn't happen if I create a folder using a different method s3fox etc.
These empty files prevent me from restoring the directories/files. When I do s3cmd sync, I get an error message "can not make directory: File exists" as it first creates that empty file and that fails when trying to create the directory. Any ideas how I can solve this problem?

Copy mdf file and use it in run time

After I copy mdf file (and his log file) I tries to Insert data.
I receive the following message:
"An attempt to attach an auto-named database for file [fileName].mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.
When I copied the file manual everything worked normally.
Is it correct the order File.Copy leaves the file engaged?
Make sure you don't have a connection open to the mdf file when you copy it. This might be related to there being only one lock file for the two copies.
The solution was much more simple.
I forgot to close the file
fileStream.Close();