Selected ListBox item onto String Array

Hello all,

I'm trying to write a programme that could open several files and process it oen by one. And I'm puting a feature in, to give the user to choose which files to be processed.

What I've done is:
I've enabled the OpenFile Dialog for multi file selection
I've put the filenames onto a ListBox, and set the selection to multi selection

When the programme runs, what I wish the programme to do is to copy the selected file names onto a string array. But it is giving me some errors.

Could someone help me please. How could I copy the selected string on a ListBox onto a string array?


Many thanks,
Thomon

What is the error? Can you post your code?

For i = 0 To ListBox1.Items.Count - 1 Step 1
If ListBox1.GetSelected(i) = True Then
ListBox1.Items.Remove(i)
ReDim Preserve file_names_copy(Y)
filename_copy = ListBox1.SelectedItems(i)
file_names_copy(Y) = Mid(filename_copy, 1, (Len(filename_copy) - 4)) & "_SUMMARY.csv" 'This is to change the file name from XXX to XXX_SUMMARY.CSV
Y += 1
End If
Next i

I'm not on the machine with the programme at the moment, so do forgive me for not being able to directly quoting the error code.
But basically, when I opened 10 files, it displays the file path on the ListBox correctly, then I selected items 1,3,5,7,9 on the ListBox.
When the programme runs, and 'i' in the For Loop goes up to 6 (for item 7), the programme halts at the line of "file_names_copy(Y) = ........". And said something about overflow.

Please help :-)

Cheers,
Thomson

I haven't declared any variables for you, apologise for that:

Dim Preserve file_names_copy() as string
Dim ilename_copy as string

You might ask why I include this line:
ListBox1.Items.Remove(i)
The answer is...... well, I really couldn't answer. I actually had made the function worked on another application, but it just somehow doesn't feel like working for this application. And being a Newbie in programming, my fault analytical power is really limited.

Cheers,
T

First remove the line ListBox1.Items.Remove(i) and secondly loop through SelectedItems colletion instead of iterating through all the items. Also, if you loop through SelectedItems colletion then there will be need to write ListBox1.GetSelected(i) = True

Another way is to use CopyTo

Code:

---

Dim strArray(ListBox1.SelectedItems.Count - 1) As String

        ListBox1.SelectedItems.CopyTo(strArray, 0)

---

Note, this will throw an error if the items in the listbox are not strings, you could declare it as an Object array if not.

Thanks Deepak_Sakpal and user_name

I've realised that as well
I've actually changed it to "For Each S in ListBox1.selecteditems" to collect all the file names

IT'S WORKING NOW!!!

Thanks for all the help, :-)

But I do have a follow up question, if I may:

At the moment, I am displaying the full file path on the ListBox. Is there any easy way to trim it down so it only display the file name, rather than the full file path?

Cheers,

Search for the last backslash in the path.
Then substring from that to end should give you the pure file name


Pradeep :)

Look into the classes in the IO namespace. I believe there is a Path object, and a File object. At least one of those will take a full path and return pretty nearly any piece of it that you could ask for.

It's the Path class, I just looked. Pass it in the full path and you can get whatever you want out of it.

Quote:

---

Originally Posted by dotdotdot

But I do have a follow up question, if I may:

At the moment, I am displaying the full file path on the ListBox. Is there any easy way to trim it down so it only display the file name, rather than the full file path?

Cheers,

---

vb.net Code:

' This will return only TST TS1.8_STEP12.txt
MessageBox.Show(IO.Path.GetFileName("C:\Documents and Settings\dsakpal\Desktop\TST TS1.8_STEP12.txt"))

Cool,

Thanks for all the help