Question

As of now, I’m sending only an empty array through the query-string.

selectPONumber=[]

Have no idea why I’m getting this error. The stacktrace points the Next on this.

If context.Request.QueryString("selectPONumber").Count <> 0 Then
    For u = 1 To request.QueryString("selectPONumber").Count
        selectPONumber.Add(request.QueryString("selectPONumber")(u))
    Next
End If

How is it getting past the if if the .Count is 0? Is my query string formatting incorrect?

If it had values it would look like

selectPONumber=[value1, value2,...]

Many thanks in advance!

Extra Credit

Yes, vb.net did not read selectPONumber as an array when using []. All that’s necessary is to to do selectPONumber=value1, value2,…

Thank-you very much for the above and beyond!

Answer 1

Are you saying your querystring looks like this?

mysite/mypage.aspx?selectPONumber=[]

If so, you are passing the string “[]” and Context.Request.QueryString("selectPONumber").Count == 2. It would evaluate to 0 for mysite/mypage.aspx?selectPONumber=.

Also, VB.NET arrays are zero-based. Use:

For u = 0 To request.QueryString("selectPONumber").Count-1