C# init combobox 'with files name

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Can i boot combobox with the names of all the files on my computer?
Or at least the names of the files are located in the project folder?

Posted 1-Oct-13 23:53pm

Member 10304617

Updated 2-Oct-13 0:11am

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tanweer 2-Oct-13 6:02am

do you want to load all files in your dropdownlist?

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Sandesh M Patil · Accepted Answer · 2013-10-02T01:23:00

Solution 2

http://stackoverflow.com/questions/6817639/get-filenames-without-path-of-a-specific-directory[^]

Posted 2-Oct-13 1:23am

Sandesh M Patil

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Member 10304617 2-Oct-13 7:52am

Thanks.

OriginalGriff · Accepted Answer · 2013-10-02T00:23:00

Solution 1

Yes: the simplest way is to handle the Form.Shown event and add this:

C#

string[] files = Directory.GetFiles(@"C:\MyProjects\", "*.*", SearchOption.AllDirectories);
myComboBox.Items.AddRange(files);

That adds the entire path, so if you want to add just the files names you will have to use a little Linq method:

C#

string[] files = Directory.GetFiles(@"C:\MyProjects\", "*.*", SearchOption.AllDirectories);
var namesOnly = files.Select(f => Path.GetFileNameWithoutExtension(f)).ToArray();
myComboBox.Items.AddRange(namesOnly);

Posted 2-Oct-13 0:23am

OriginalGriff

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Member 10304617 2-Oct-13 6:34am

Thanks... you help me a lot

OriginalGriff 2-Oct-13 6:38am

You're welcome!

Member 10304617 2-Oct-13 6:45am

I do it for 2 combobox, how can I reduce the selected item of the first combobox?
from the second combobox

OriginalGriff 2-Oct-13 6:55am

Sorry? That doesn't make any sense to me - remember I can't see your screen, so I have no idea what you are trying to do! :laugh:
Try explaining in more detail, please.

Member 10304617 2-Oct-13 7:34am

I boot the names into 2 combobox, and the user need to select two files from the comboboxes. and there is a program that compares them. so i can not give the user the option to select the same file twice...

OriginalGriff 2-Oct-13 8:42am

That's messy - you would have to remove or disable the item based on the selection from the other combo. And that's not trivial, as there is no facility to "disable" a ComboBox item, and I've not tried to use a DataView with a ComboBox - not convinced that would work, but it might be worth your looking at for a hour or so.

The way I would do it is to cheat.
Handle the selection event for both ComboBoxes, and enable disable the "Compare" button based on "are the selected items the same?"...easy, quick and very effective! :laugh:

Member 10304617 2-Oct-13 8:53am

Nice idea...
I tried do this
string[] files2 = Directory.GetFiles(@"C:\Users\tfadidax\Desktop\Important Documents\Laboratory\C#\Files and Excel\Files and Excel\bin\Debug", "*.txt*", SearchOption.AllDirectories);
var namesOnly2 = files2.Where(f => f != CmbForm1.Text).Select(f => Path.GetFileNameWithoutExtension(f)).ToArray();
CmbForm2.Items.AddRange(namesOnly2);

And now i have to cut the file name from the path. what do you think about it?

OriginalGriff 2-Oct-13 9:13am

Nasty - because as soon as they change the selection in either combobox you have to put all the values back into the other one!
That's why I didn't suggest it - it's inefficient, nasty and slow - but considered the DataView instead because it allows you to filter the displayed items using SQL syntax without affecting the underlying data. Which means you don't have to clear (which you forgot) and reload the combobox each time (and lose any selection in that in the process)

Member 10304617 2-Oct-13 9:20am

That's why I insert the data into the second combobox only after selecting the first item...

OriginalGriff 2-Oct-13 9:40am

Yes - but what if they select the second one first? :laugh:

Member 10304617 2-Oct-13 9:29am

Never mind...I wrote this:
private void CmbForm1_SelectedIndexChanged(object sender, EventArgs e)
{
bool a=CmbForm1.Text == CmbForm2.Text ? btn_compare_two_files.Enabled=false:btn_compare_two_files.Enabled=true;
}

OriginalGriff 2-Oct-13 9:43am

A heck of a lot easier, isn't it? :laugh:
But you don't want it like that! Try this:
btn_compare_two_files.Enabled = CmbForm1.Text != CmbForm2.Text;
Does the same thing, but is much easier to read.

Member 10304617 2-Oct-13 9:50am

Yes you are right..
Sorry if I've stolen a lot of your time
Thanks!

OriginalGriff 2-Oct-13 10:52am

You're welcome!

C# init combobox 'with files name

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