Using ParseQueryString function to get values from QueryString

Question

I needed to get values out of a string in a QueryString format, that is such as: data1=value1&data2=value2...

Someone suggested I used HttpUtility.ParseQueryString to get the value, I've searched and searched but I can't find any documentation or implementation of this and the Microsoft documentation for it doesn't explain how it works, can someone tell me hwat I'm doing wrong, my code is below;

Public Shared Sub ProcessString(ByVal Vstring As String)
    Dim var As NameValueCollection = HttpUtility.ParseQueryString(Vstring)
    Dim vname As String = var.QueryString("VNAME")
End Sub

Tim Schmelter · Accepted Answer · 2012-08-17 23:40:39Z

1

MSDN has an example.

' Parse the query string variables into a NameValueCollection.
Dim qscoll As System.Collections.Specialized.NameValueCollection = HttpUtility.ParseQueryString(Vstring)
Dim vname As String = qscoll("VNAME")

A NameValueCollection represents a collection of associated String keys and String values that can be accessed either with the key or with the index.

answered Aug 17, 2012 at 23:40

Tim Schmelter

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2 Comments

user1044220 Over a year ago

problem is NameValueCollection keeps coming up as not a valid data type do you know how I can fix this?

Tim Schmelter Over a year ago

@user1044220: Edited my answer to provide the full path to the class. You need to add Imports System.Collections.Specialized or use the fully qualified name as in my answer.

user1044220 · Accepted Answer · 2012-08-18 09:07:30Z

0

I found the problem, I was referencing everything fine but I was doing it in a separate .VB dependency file, once I did it on the actual code behind of the aspx form that solved the problem and it all worked. So now I'm just passing the string from Codebehind as a specialised.NameValue collection in to the function.

answered Aug 18, 2012 at 9:07

user1044220

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