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Listbox help

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Listbox help

quakeworld2007	12 Dec, 2007 - 06:00 PM Post #1
New D.I.C Head Joined: 28 Sep, 2007 Posts: 44 My Contributions	I have a listbox in one windows form and when the item is selected and a update button is clicked I am trying to make it open a new form where the user can update the item. My code in the class where the listbox is CODE Public Function SelcIndex() Static i As Integer i = ListBox1.SelectedIndex Return i End Function and my code in the new form i want to open is CODE locs = locat.GetAll() Dim i As Integer For i = 0 To locs.Count - 1 i = thelocation.SelcIndex alocation = locs(i) TextBox2.Text = alocation.GetLoc The problem is no matter what item in the listbox i select i is always equal to -1. How do I fix it so it matches with whatever item was selected from the listbox?
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girasquid	RE: Listbox Help 12 Dec, 2007 - 07:53 PM Post #2
Barbarbar Joined: 3 Oct, 2006 Posts: 1,295 Thanked: 18 times Dream Kudos: 725 My Contributions	I might be missing something, but...why are you writing a function to duplicate the functionality of SelectedIndex? Why not just use this: CODE i = thelocation.SelectedIndex; ??
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born2c0de	RE: Listbox Help 12 Dec, 2007 - 09:40 PM Post #3
printf("I'm a %XR",195936478); Joined: 26 Nov, 2004 Posts: 4,029 Thanked: 38 times Dream Kudos: 2800 Expert In: 80x86 Assembly, C/C++, VB6, VB.NET, C#, J2SE, Win32 API, Reversing My Contributions	QUOTE The problem is no matter what item in the listbox i select i is always equal to -1. How do I fix it so it matches with whatever item was selected from the listbox? That's because you've declared i as a static variable and not a global. Static variables are accessible only in the function they were declared in. Declare your variable as a global and it should work. Why do you need 'i', if the SelectedIndex property is already available?
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quakeworld2007	RE: Listbox Help 13 Dec, 2007 - 08:55 AM Post #4
New D.I.C Head Joined: 28 Sep, 2007 Posts: 44 My Contributions	Ok, I changed it to this CODE locs = locat.GetAll() alocation = locs(thelocation.ListBox1.SelectedIndex) But the selectedIndex is still always -1. Any suggestions?
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Jayman	RE: Listbox Help 13 Dec, 2007 - 10:30 AM Post #5
Student of Life Joined: 26 Dec, 2005 Posts: 7,317 Thanked: 66 times Dream Kudos: 500 Expert In: Everything My Contributions	Do you have anything selected in the listbox? You need to click on and highlight an item in the list. The SelectedIndex will return -1 when there is nothing selected in the listbox.
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quakeworld2007	RE: Listbox Help 13 Dec, 2007 - 12:44 PM Post #6
New D.I.C Head Joined: 28 Sep, 2007 Posts: 44 My Contributions	Yeh, that is the problem then I am highlighting an item, but then clicking on a button that i have defined like this CODE Dim form As New modifyLocation() form.ShowDialog() and that form is trying to get the selected item with this code CODE locs = locat.GetAll() alocation = locs(thelocation.ListBox1.SelectedIndex) but no item is beging passed. Is the only way to fix this to add a constructor to modifyLocation that takes the ListBox1.SelectedIndex?
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Jayman	RE: Listbox Help 13 Dec, 2007 - 01:46 PM Post #7
Student of Life Joined: 26 Dec, 2005 Posts: 7,317 Thanked: 66 times Dream Kudos: 500 Expert In: Everything My Contributions	That would be the easiest solution, just pass the SelectedIndex to a constructor. Is that all you need on the other form, the index of the item selected?
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quakeworld2007	RE: Listbox Help 13 Dec, 2007 - 08:39 PM Post #8
New D.I.C Head Joined: 28 Sep, 2007 Posts: 44 My Contributions	Yes, that is all the form is goign to need.
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Jayman	RE: Listbox Help 13 Dec, 2007 - 09:00 PM Post #9
Student of Life Joined: 26 Dec, 2005 Posts: 7,317 Thanked: 66 times Dream Kudos: 500 Expert In: Everything My Contributions	Then create another constructor and pass the index to it as we discussed. That will work dandy.
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