how to display this code in the listbox

Question

1.00/5 (1 vote)

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how to get all this files in the listbox but i dont know where put this code

C#

private void CleanTemporaryFolders()
{
    String tempFolder = Environment.ExpandEnvironmentVariables("%TEMP%");
    String recent = Environment.ExpandEnvironmentVariables("%USERPROFILE%") + "\\Recent";
    String prefetch = Environment.ExpandEnvironmentVariables("%SYSTEMROOT%") + "\\Prefetch";
    EmptyFolderContents(tempFolder);
    EmptyFolderContents(recent);
    EmptyFolderContents(prefetch);
}

private void EmptyFolderContents(string folderName)
{
    foreach (var folder in Directory.GetDirectories(folderName))
    {
        try
        {
            Directory.Delete(folder, true);
        }
        catch (Exception excep)
        {
            System.Diagnostics.Debug.WriteLine(excep);
        }
    }
    foreach (var file in Directory.GetFiles(folderName))
    {
        try
        {
            File.Delete(file);
        }
        catch (Exception excep)
        {
            System.Diagnostics.Debug.WriteLine(excep);
        }
    }
}

Posted 19-Nov-14 17:54pm

Srikanth59

Updated 19-Nov-14 21:30pm

den2k88

v4

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Comments

Tomas Takac 20-Nov-14 5:09am

What exactly do you want to fill in the listbox? The list of files & directories?

Srikanth59 21-Nov-14 4:59am

i want to put all the files in the listbox

BillWoodruff 20-Nov-14 6:25am

I have to say that your code makes me "nervous:" unless you are running your program as Admin, or have elevated your privileges in code, you are not going to access the 'PreFetch folder.

And, I have a general gut-level response to any code that does a lot of folder/file deletes without the user approving them all, having the opportunity to cancel some/all of the delete targets.

I'd like to ask you why you have designed your program this way.

Have you considered the idea of putting all the delete target filepaths into something like a CheckedListBox, and asking the user to confirm before they delete ?

2 solutions

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Richard MacCutchan · Answer 1 · 2014-11-19T21:41:00

Solution 1

You should not be trying to delete the directories before you have deleted all the files in them. You probably need a recursive method that does something like:

Delete Method
Begin
    For Each Item in DirectoryPath
    Begin
        If Item is Directory
        Then
            Call Delete (DirectoryPath + Directory)
            Delete Directory
        ElseIf Item is File
        Then
            Delete File
        EndIf
    EndFor
End

If you want the items in a listbox then you need to add them as you process them.

Posted 19-Nov-14 21:41pm

Richard MacCutchan

Updated 19-Nov-14 22:17pm

v2

Comments

BillWoodruff 20-Nov-14 6:21am

The OP's code makes me a bit "nervous:" I'm immediately thinking of how he's going to bounce-off accessing the 'PreFetch folder unless he has run as admin, or somehow elevated his privileges; or, what I perceive as the general "un-wisdom" of massive folder/file deletes.

I am curious, however: I do assume that if one did successfully delete every directory in a Folder, then what remained in the Folder could be only ... files.

Richard MacCutchan 20-Nov-14 7:13am

One has to assume that the OP knows what he/she is doing (ha ha!).
And you cannot delete directories unless you delete all their files first.

Tomas Takac · Answer 2 · 2014-11-21T01:39:00

Your question is not entirely clear, but here is how you can collect names of all the files you are deleting. However, please take the time to review all the other comments here, there is a lot of valid points you should really consider.

C#

private List<string> EmptyFolderContents(string folderName)
{
    // directories omitted as you are only interested in files
    var deletedFiles = new List<string>();
    foreach (var file in Directory.GetFiles(folderName))
    {
        try
        {
            File.Delete(file);
            deletedFiles.Add(file); // file has been deleted successfully
        }
        catch (Exception excep)
        {
            System.Diagnostics.Debug.WriteLine(excep);
        }
    }
    return deletedFiles;
}

The you need to feed the list into your list box. I assume that part is clear since you posted the code relevant to deleting the files, not the UI-related code.