Deleting an item from a list

Hi all,

I'm currently writing a program where you can add items to a listbox, and there is a button to delete the highlighted item. I have tried to do it similar to:

Code:

---

Private Sub Delete_Click()
Dim DelMe as string

DelMe = List1.selected
List1.remove(DelMe)
End Sub

---

Well, that's really the pseudocode for what I'm trying to do. Obviously it won't work, since I must specify an index. However, I will not know the index, since it depends on which item the user clicks.

How do I do this?

Thanks :)

"delme = List1.ListIndex" will give you the index for the item you've clicked

and I believe "List1.RemoveItem delme" will do what you want...not sure, this is offhand

Most of us, when we're not sure, type the "list1." and look through the possibilities...it's removeSOMETHING I am sure :-)

Close :)

VB Code:

List1.RemoveItem (List1.ListIndex)

Quote:

---

Originally Posted by lintz

Close :)

VB Code:

List1.RemoveItem (List1.ListIndex)

---

(tap)(tap)

Ahem! :afrog:

It works, thanks a lot ^__^

Bear in mind that this will produce an error if .ListIndex will equal -1 (that is when non of the list items is selected - usually on load, if ListBox is not focused). This can be prevented:

VB Code:

If List1.ListIndex > -1 Then
    List1.RemoveItem (List1.ListIndex)
End If

I never thought of that :-)

Well, I never do...I rarely ever put in error protection code unless I notice a possible error point, which is rarely if ever...I'm lazy :-)

Hehe, gavio - I figured that out after putting the code in.
I'm quite big on validation, so when I put in code I like to test it and the extremes of data.. In this case I was wondering what would happen if nothing was selected, so I tried it and it gave an error. So I had it MsgBox back the listindex, which wa s-1, so I just put it in a If List1.ListIndex <> -1 if ^_^

Thanks for the advice though :)

Oh, another quick question about the same program :)

I have 3 ListBoxes, and I want it so that when the user clicks an item in one, it highlights the equiv. in all 3. This is the code I tried, to give you an idea what's going on:

Code:

---

Private Sub ShopListItems_Click()
Dim LI As Integer

LI = ShopListItems.ListIndex()
Price.Selected (LI)
End Sub

---

"ShopListItems" is the main listbox, and "Price" is the second one. I also tried just having: "Price.Selected(ShopListItems.ListIndex)", but that didn't work either. Any ideas?

<> is not neccessary... > is enough to determine if it's bigger then -1 :)

VB Code:

Private Sub ShopListItems_Click()
    If ShopListItems.ListIndex > -1 And (Price.ListCount > ShopListItems.ListIndex) Then
        Price.ListIndex = ShopListItems.ListIndex
    End If
End Sub

Ahh, thanks!
As for my last question, any ideas though? ^_^

Quote:

---

Originally Posted by Arby

Ahh, thanks!
As for my last question, any ideas though? ^_^

---

?? :confused:

Quote:

---

Originally Posted by Arby

Oh, another quick question about the same program :)

I have 3 ListBoxes, and I want it so that when the user clicks an item in one, it highlights the equiv. in all 3. This is the code I tried, to give you an idea what's going on:

Code:

---

Private Sub ShopListItems_Click()
Dim LI As Integer

LI = ShopListItems.ListIndex()
Price.Selected (LI)
End Sub

---

"ShopListItems" is the main listbox, and "Price" is the second one. I also tried just having: "Price.Selected(ShopListItems.ListIndex)", but that didn't work either. Any ideas?

---

This one

Doesn't the code from my reply in post #10 help?

*blinks* How did I manage to miss that? XD

Sorry, I missed it. Works fine! Thanks a lot ^__^

Two more little problems:

1. I have a delete button to delete the entries from all ListBoxes. When this is clicked, I want focus to return to the top of the listbox (ListIndex 0, I guess). I have tried:

Code:

---

If ShopListItems.ListIndex <> -1 Then
    ShopListItems.Selected (0)
End If

---

and
[code]
If ShopListItems.ListIndex <> -1 Then
ShopListItems.ListIndex = 0
End If
With no luck. Any ideas?

And 2:
I have some code which adds up all the values in the "Price" listbox to get a total. The code is:

Code:

---

MaxList = Price.ListCount
Rerun:
Price.ListIndex = ValsRepeat
CalcSub = CalcSub + Price.List(ValsRepeat)
ValsRepeat = ValsRepeat + 1
If ValsRepeat > MaxList - 1 Then
    GoTo Now1
End If
GoTo Rerun

Now1:

---

However, I find that if I delete ALL items on the listbox, and then try to add a new item, on the line:
Price.ListIndex = ValsRepeat

I get an error. I can't seem to sort this one out, any ideas? :)

Thanks!


EDIT:My program so far, In case you need the code.
I know there are other problems with it, like the form not refreshing when items are deleted. I will sort this out soon :)

When you delete all items from a ListBox, .ListIndex property equals -1. Perhaps you can solve this with a condition:

VB Code:

If Price.ListCount > 0 Then 'Price ListBox has at least one item
    'your code...
End If

Well, it's in a seperate form. But If I do that, then if there are no items in the listbox, it will not add anything to the listbox :(

Now it's stopped calculating the totals entierly >_<
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