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Using arrays
If I want to have an array of strings that I can add to. How can I do this without keeping track of every time I add a new string.
So what I have been doing is this...
Dim myStrings(1000) As String
Dim myStringCount As Integer
Then while the program is doing its sorting work
If Not myStrings.Contains(pair.Pr
myStrings(myStringCount) = pair.Primary
myStringCount = myStringCount + 1
End If
Then when I display them
I do a for loop using myStringCount to display each item
For i = 0 To myStringCount - 1
ListBox1.Items.Add(MyStrin
Next
I'm sure there is a more efficient way. How would you guys do this?
So what I have been doing is this...
Dim myStrings(1000) As String
Dim myStringCount As Integer
Then while the program is doing its sorting work
If Not myStrings.Contains(pair.Pr
myStrings(myStringCount) = pair.Primary
myStringCount = myStringCount + 1
End If
Then when I display them
I do a for loop using myStringCount to display each item
For i = 0 To myStringCount - 1
ListBox1.Items.Add(MyStrin
Next
I'm sure there is a more efficient way. How would you guys do this?
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Thats what I would like to be able to use, but I think because of how I am doing it with the myStringCount it does not work.
I get a null exception if I try and use that.
I get a null exception if I try and use that.
Ok, Use this way -
If you need this as array at some point, use this -
Dim myArray As String() = myStrings.ToArray()
and for count -
myStrings.Count
Dim myStrings As New List(Of String)()
If Not myStrings.Contains(pair.Primary) Then
myStrings.Add(pair.Primary)
End If
For Each item As String In myStrings
ListBox1.Items.Add(item)
Next
If you need this as array at some point, use this -
Dim myArray As String() = myStrings.ToArray()
and for count -
myStrings.Count
That works, and I understand everything except for this part...
If you need this as array at some point, use this -
Dim myArray As String() = myStrings.ToArray()
What do you mean if I need this as array? Why would I need to do that?
If you need this as array at some point, use this -
Dim myArray As String() = myStrings.ToArray()
What do you mean if I need this as array? Why would I need to do that?
I'd be tempted to have a single string, comma-separated, to which you add items as required.
you can then split the string into an array, and assign the result directly to the .List property of a listbox.
dim MyString as string
if instr(Mystring,pair.primary)=0 then myString=Mystring & pair.primary & ","
you can then split the string into an array, and assign the result directly to the .List property of a listbox.
dim aString() as string
'ditch the final comma
MyString=Strings.Left(MyString,len(MyString)-1)
aString=Split(MyString,",")
ListBox1.List=aString
@Neil
The end goal is to use the items in the list to create a check boxes at run time that can be selected to show the data from that pair. Would you still do it with the single csv string?
Thanks for the input.
The end goal is to use the items in the list to create a check boxes at run time that can be selected to show the data from that pair. Would you still do it with the single csv string?
Thanks for the input.
I think it depends partly on how many items there are going to be in your list. If it's <30 I'd use the single csv string approach because then you have no need to track how many items there are.
If it's a very large number it may be better to reDim Preserve the array as you go along. I guess you are creating checkboxes on the fly, in which case you will need to iterate the array as in your original example.
If it's a very large number it may be better to reDim Preserve the array as you go along. I guess you are creating checkboxes on the fly, in which case you will need to iterate the array as in your original example.
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