Use one of the FileSystem. GetFiles method overloads, supplying the name and path of the directory to search in the directory parameter. The following example returns all files in the directory and adds them to ListBox1. The path is not valid because it is Nothing ArgumentNullException. The path exceeds the system-defined maximum length PathTooLongException. A file or directory name in the path contains a colon : or is in an invalid format NotSupportedException. Submit your solution!
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Provide an answer or move on to the next question. Let's work to help developers, not make them feel stupid. Related Questions. FTP in VB. Post an article. Subscribe to Article RSS. Click Sign In to add the tip, solution, correction or comment that will help other users. Report inappropriate content using these instructions. Iterating directories and files VB. NET Table of Contents. Important Make sure to read the direction for downloading the source code as the method is different than conventional cloning a GitHub repository.
To iterate a folder structure can be done using the following code. Return files. End Function. Await Task. For Each file As String In files. Add file. End Sub. Although the above examples will work for simple operations there will be cases where as directories and files are iterated other operations may be needed which is where recursive methods will come in handy.
Rather than attempting to jump into writing code without understanding what can happen such as when the user running an application does not have permissions to access directory or a file.
Rather than writing code and expecting no exceptions to be thrown using Visual Studio's debugger to step through code would seem prudent yet for a large directory structure this will be a daunting task which can lead to frustration.
Instead a better idea is to start off with no exception handling at first and setup events for watching what is transpiring when using a recursive method. In this example the task is to iterate a folder with sub folders with the option to cancel the operation as without a cancel option the user must wait or use task manager to end the application. Full source for the following. The following provide subscribers to monitor any exceptions thrown while traversing a folder structure.
First ensure the folder exists which should be done by the caller but a consideration is that a folder may be removed external from the application. Next, to make things interesting exclude some folders see the following Now using EnumrateDirectories on the current folder within an asynchronous task checking folder attributes for hidden, system and reparse points.
If found exclude these folders. Check for cancellation, if there is a request to cancel use ct. In the catch part of try statement a checks are done for user cancelling and unauthorized exceptions then a fall through for general exceptions. If Not directoryInfo. Exists Then.
End If. If Not excludeFileExtensions. Any AddressOf directoryInfo. Contains Then. Delay 1. Dim folder As DirectoryInfo. Run Async Function. Arnold Higuit. Net - File Handling Advertisements. Previous Page. Next Page. Live Demo. Useful Video Courses. More Detail. NET - Hands On! Previous Page Print Page. Save Close.
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