VB.NET Array Question

[PornFlake]

I have two arrays name() and age(). I am using a DO WHILE loop to populate the two arrays. After the arrays are populated I am using a combo box to select name() and need to pass the () on to the age variable but I am not sure how to do that.

When I select an item in the combo box I know the value selected is correct as I can pass the variable name into a message box and it displays the correct selection. If I select an item in the fifth position I need to select the corresponding age() of the same position.

The array is being populated by reading a .txt file that contains the name, age in sequential order.

Anyone?

-Funk

 

[Snowknight26]

ComboBox.SelectedIndex

 

[chinesepiratefood]

I have never used VB, but I assume it would be something like this if I understand your question:

age(comboBox.SelectedIndex)

Here is the MS Documentation on comboboxes: http://msdn.microsoft.com/en-us/library/system.windows.forms.combobox.aspx

 

[PornFlake]

SelectedIndex or SelectedItem?

 

[Snowknight26]

SelectedIndex returns the selected index in the collection, SelectedItem returns the selected object in the collection. You obviously can't safely cast an Object to a numerical type in your situation.

 

[PornFlake]

How do I pass SelectedIndex to the second array? That is what I am confused about.

-Funk

 

[Snowknight26]

Same way you're passing the value of the currently selected item to a MessageBox? Have any sample code?

 

[PornFlake]

Dim objReader As IO.StreamReader
Dim count As Integer
'Dim intFirstYearPopulation As Integer

If IO.File.Exists("c:\cities\cities.txt") = True Then
objReader = IO.File.OpenText("c:\cities\cities.txt")

Do While objReader.Peek <> -1
strCityName(count) = objReader.ReadLine()
decPopulation(count) = objReader.ReadLine()
cboCity.Items.Add(strCityName(count))
count += 1
Loop
Else

MsgBox("The file is not available. Restart the program when the file is available", , "Error")
Me.Close()

End If

End Sub

Private Sub btnComputeGrowth_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnComputeGrowth.Click
strSelectedItem = cboCity.SelectedItem
MsgBox(strSelectedItem)

These are declared as global:

Dim strCityName(9), strSelectedItem As String
Dim decPopulation(9) As Decimal

 

[chinesepiratefood]

I have never used VB, but I assume it would be something like this if I understand your question:

age(comboBox.SelectedIndex)

Here is the MS Documentation on comboboxes: http://msdn.microsoft.com/en-us/library/system.windows.forms.combobox.aspx

Like that ^^

You don't "pass" it to an array technically, if you want to get picky on the semantics.