Getting String from array?

Question

Hey guy's im trying to load a string from an array(in this case a url) then download the file, but i get this error below:

Argument cannot be Nothing.
Parameter name: address

Here is my code:

    Dim urld As String

    urld = dls.GetValue(dlcount)
    My.Computer.Network.DownloadFile(urld, "images/image-" + dlcount.ToString + ".png")
    Form1.o.Text = Form1.o.Text + urld + vbNewLine

dls is the array.

I thought i did everything right but maybe not.

LukeH · Accepted Answer · 2011-09-01 10:18:49Z

1

Difficult to say for sure, but it looks like urld is Nothing when you call the DownloadFile method. This would be caused by the call to dls.GetValue(dlcount) returning Nothing.

So it's likely that there's either a problem with the GetValue method itself, or the value of dlcount that you're passing to it is invalid in some way.

answered Sep 1, 2011 at 10:18

LukeH

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5 Comments

Duncan Palmer Over a year ago

Ok, did some debugging and that is the case, how would i go about retrieving a string at a certain index in the array?

LukeH Over a year ago

@Duncan: Presumably just with urld = dls(dlcount).

LukeH Over a year ago

@Duncan: And there's definitely a valid string at that index of the array?

Duncan Palmer Over a year ago

I figured out the problem, it was my code for adding to the array. was using dls(count) = STRING HERE instead of dls.setValue(Value, index)

Martin Over a year ago

perhaps you have to take the starting index of 0 in account: and take dls(dlcount-1)?

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