Hiding ".txt" extension and loading file names from folder

Question

I need hide ".txt" extensions in "combobox" and i dont know how.

And how i can do that, that files will loaded from actualy addresesr and some folder? Now i using this code:

Im using this code now:

DirectoryInfo di = new DirectoryInfo(@"C:\Users\JD_1609\source\repos\WindowsFormsApp1\WindowsFormsApp1\bin\Debug\PCs");
FileInfo[] Files = di.GetFiles("*.txt");

comboBox1.DataSource = Files;
comboBox1.DisplayMember = "Name";

But if i transfer it to other pc so its will not working right? So how i can load files from actually addresser?

How are you displaying the files in your combobox? Instead of displaying the files with the extension, you should display just the names — maccettura, Apr 25 '18 at 21:24
Im using this code now: DirectoryInfo di = new DirectoryInfo(@"C:\Users\JD_1609\source\repos\WindowsFormsApp1\WindowsFormsApp1\bin\Debug\PCs"); FileInfo[] Files = di.GetFiles("*.txt"); comboBox1.DataSource = Files; comboBox1.DisplayMember = "Name"; — JD_1609, Apr 25 '18 at 21:32
Do you want your Value to be the full path? Just the name with extension? — maccettura, Apr 25 '18 at 21:44

maccettura · Accepted Answer · 2018-04-25T22:05:50.043

0

To get the names of a file without the extension included you can use the nifty GetFileNameWithoutExtension() method of the Path class.

If you want your DataSource to display the name without the extension, but keep the "value" as a FileInfo, you can use a little Linq to turn your FileInfo[] into a Dictionary<string, FileInfo>, then set the display and value member properties appropriately:

comboBox1.DataSource = new BindingSource(
                           Files.ToDictionary(x => Path.GetFileNameWithoutExtension(x.Name), 
                                              x => x), 
                           null);
comboBox1.DisplayMember = "Key";
comboBox1.ValueMember = "Value";

Remember that a Dictionary cannot have duplicate keys. In your code you grab all the textfiles of a single directory, so even when we strip the extension off we can be certain that there won't be duplicates. If you change your query in a way that would introduce duplicates into the Dictionary, my answer will throw an exception.

If all you need is the display and value to be the filename without extension its even easier:

comboBox1.DataSource = Files
                           .Select(x => Path.GetFileNameWithoutExtension(x.Name))
                           .ToArray();

edited Apr 25 '18 at 22:05

answered Apr 25 '18 at 21:28

maccettura

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When I try use this so its write: "System.ArgumentException: The Structured DataBinding object receives IList or IListSource as the data source." – JD_1609 Apr 25 '18 at 21:54
@JD_1609 look at my edited answer – maccettura Apr 25 '18 at 21:58
And now its write error: "Argument 1: Can not convert from System.IO.FileInfo to string." :D -when i use that easier way – JD_1609 Apr 25 '18 at 22:05
@JD_1609 sorry, long day. I just updated. It should be `Path.GetFileNameWithoutExtension(x.Name)` not `Path.GetFileNameWithoutExtension(x)` – maccettura Apr 25 '18 at 22:06
np, its work now thanks you SOOOOO MUCH! :) <3 – JD_1609 Apr 25 '18 at 22:08

Hiding ".txt" extension and loading file names from folder

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