VS 2010 [RESOLVED] ComboBox.SelectedIndex can't go higher than 9?-VBForums
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Thread: [RESOLVED] ComboBox.SelectedIndex can't go higher than 9?

  1. #1

    Thread Starter
    Junior Member Dendari's Avatar
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    Resolved [RESOLVED] ComboBox.SelectedIndex can't go higher than 9?

    Hello everyone.

    I'm working with a ComboBox which has 14 items.

    Using the following code I got a problem
    vb Code:
    1. If Me.ComboBox1.SelectedIndex = 0 Then
    2.     MsgBox("item 1")
    3. ElseIf Me.ComboBox1.SelectedIndex = 1 Then
    4.     MsgBox("item 2")
    5.     '...
    6. ElseIf Me.ComboBox1.SelectedIndex = 9 Then
    7.     MsgBox("item 9")
    8. ElseIf Me.ComboBox1.SelectedIndex = 10 Then
    9.     MsgBox("item 10")
    10.     '...
    11. End If

    The problem is that after the SelectedIndex = 9 it won't read properly the SelectedIndex = 10, it seems like it consider only the first number (1) instead of the whole one (10). In fact get the same result as if it was SelectedIndex = 1

    What am I doing wrong?
    Last edited by Dendari; Apr 24th, 2012 at 07:01 PM.

  2. #2
    PowerPoster cicatrix's Avatar
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    Re: ComboBox.SelectedIndex can't go higher than 9?

    What does this show?

    vb Code:
    1. Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) _  
    2.                                    Handles ComboBox1.SelectedIndexChanged
    3.      MessageBox.Show("item " & ComboBox1.SelectedIndex.ToString())
    4. End Sub

  3. #3
    .NUT jmcilhinney's Avatar
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    Re: ComboBox.SelectedIndex can't go higher than 9?

    Quote Originally Posted by Dendari View Post
    Hello everyone.

    I'm working with a ComboBox which has 14 items.

    Using the following code I got a problem
    Code:
    If Me.ComboBox1.SelectedIndex = 0 Then
        MsgBox("item 1")
    ElseIf If Me.ComboBox1.SelectedIndex = 1 Then
        MsgBox("item 2")
        '...
    ElseIf If Me.ComboBox1.SelectedIndex = 9 Then
        MsgBox("item 9") 
    ElseIf If Me.ComboBox1.SelectedIndex = 10 Then
        MsgBox("item 10")
        '...
    End If
    The problem is that after the SelectedIndex = 9 it won't read properly the SelectedIndex = 10, it seems like it consider only the first number (1) instead of the whole one (10). In fact get the same result as if it was SelectedIndex = 1

    What am I doing wrong?
    Don't you have too many If's in there? Is that just a typo? If not then I'm guessing that that has something to do with the problem. If it is then why are you typing at all and not copying and pasting?

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  4. #4
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    Re: ComboBox.SelectedIndex can't go higher than 9?

    this is one of those cases where a Select Case would probably be the better mouse trap.

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  5. #5
    Angel of Code Niya's Avatar
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    Re: ComboBox.SelectedIndex can't go higher than 9?

    Quote Originally Posted by jmcilhinney View Post
    Don't you have too many If's in there? Is that just a typo? If not then I'm guessing that that has something to do with the problem. If it is then why are you typing at all and not copying and pasting?
    Yeah, you're right. My IDE is identifying that If after the ElseIf as the If function which does something different.

    @Op
    Remove that extra If after your ElseIf. In fact it would be better to follow tech's advice and use Select Case instead.
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  6. #6
    Frenzied Member MattP's Avatar
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    Re: ComboBox.SelectedIndex can't go higher than 9?

    Quote Originally Posted by Niya View Post
    @Op
    Remove that extra If after your ElseIf. In fact it would be better to follow tech's advice and use Select Case instead.
    I would advise to follow cicatrix's advice of concatenating the SelectedIndex and forgetting all of the If-Then-Else or Select-Case statements altogether.

    If he's planning on having different code for each different index then Select-Case would be a better choice for readability and maintainability.
    This pattern in common to all great programmers I know: they're not experts in something as much as experts in becoming experts in something.

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  7. #7

    Thread Starter
    Junior Member Dendari's Avatar
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    Re: ComboBox.SelectedIndex can't go higher than 9?

    Quote Originally Posted by cicatrix View Post
    What does this show?

    vb Code:
    1. Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) _  
    2.                                    Handles ComboBox1.SelectedIndexChanged
    3.      MessageBox.Show("item " & ComboBox1.SelectedIndex.ToString())
    4. End Sub
    It show me the current item correctly.

    Quote Originally Posted by jmcilhinney View Post
    Don't you have too many If's in there? Is that just a typo? If not then I'm guessing that that has something to do with the problem. If it is then why are you typing at all and not copying and pasting?
    Yes that was a typo when I wrote it here I didn't copy it directly from the source code.

    EDIT: find the error, resolved it.
    Last edited by Dendari; Apr 24th, 2012 at 08:06 PM.

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