如何确保用户选择特定文件夹并从所选文件夹中的文件中删除文件扩展名？

Question

What I have here is the user select a folder full of .txt files from a external drive and a dummy file is made with the filename to a local folder.

I have 2 questions regarding the code below.

1. How do I verify that the user select a specific folder?

2. How do I remove the .txt extension? The code copies the file name and creates the files but its labeled "text.txt.png" but I need it to read "text.png".

     int g; private void folderSelect() { FolderBrowserDialog folder = new FolderBrowserDialog(); folder.RootFolder = Environment.SpecialFolder.MyComputer; folder.ShowNewFolderButton = false; folder.Description = "Select Folder"; if (folder.ShowDialog() == DialogResult.OK) { DirectoryInfo files = new DirectoryInfo(folder.SelectedPath); FileInfo[] textFiles = files.GetFiles("*.txt"); while (g < textFiles.Length) { if (g <= textFiles.Length) { File.Create("path/" + (textFiles[g].Name + ".png")); g++; } else { break; } } } 

Note: I tried using Path.GetFileNameWithoutExtension to remove the extension but Im not sure if i was using it correctly.

Any help would be appreciated. Thank you in advance.

Answer 1

const string NEW_PATH = "path/";
if (!Directory.Exists(NEW_PATH))
    Directory.CreateDirectory(NEW_PATH);
const string PATH_TO_CHECK = "correctpath";

FolderBrowserDialog folder = new FolderBrowserDialog();
folder.RootFolder = Environment.SpecialFolder.MyComputer;
folder.ShowNewFolderButton = false;
folder.Description = "Select Folder";

if (folder.ShowDialog() == DialogResult.OK)
{
    string pathPastDrive = folder.SelectedPath.Substring(Path.GetPathRoot(folder.SelectedPath).Length).ToLower();
    // Here it depends on whether you want to check (1) that the path is EXACTLY what you want,
    // or (2) whether the selected path just needs to END in the path that you want.
    /*1*/ if (!pathPastDrive == PATH_TO_CHECK)
    /*2*/ if (!pathPastDrive.EndsWith(PATH_TO_CHECK))
        return; // or you can throw an exception if you want

    foreach (string textFile in Directory.GetFiles(folder.SelectedPath, "*.txt"))
        File.Create(NEW_PATH + Path.GetFileNameWithoutExtension(textFile) + ".png");
}

You can use GetFileNameWithoutExtension , and it makes it pretty easy.

Also, if you're already sure that your new folder exists, then you can elide the first three lines and replace NEW_PATH with "path/" in the last line.

Answer 2

To see the returned path just use the SelectedPath property, then you can compare it to whatever you had in mind. The @ before the path just means I don't have to escape any characters, it's the same as "C:\\\\MyPath" .

FolderBrowserDialog folder = new FolderBrowserDialog();
if (folder.ShowDialog() == DialogResult.OK)
{
    if (folder.SelectedPath == @"C:\MyPath")
    {
        // DO SOMETHING
    }
}

You already hit the nail on the head about the file name without extension, change this line:

File.Create("path/" + (textFiles[g].Name + ".png"));

To this:

File.Create("path/" + (Path.GetFileNameWithoutExtension(textFiles[g].Name) + ".png"));

Edit:

To get the folder name you already have the DirectoryInfo object so just use that:

DirectoryInfo files = new DirectoryInfo(folder.SelectedPath);
string folderName = files.Name;