Conerting String into Collection

[apurvaG]

Hi All,

Can I use "DirectCast" or "Ctype" to convert a string into NameValueCollection in VB.Net?

Example I want to convert the string "a=200&b=300" to NameValueCollection class using inbuilt method.

Don't want to go for split option.

Please let me know ASAP

Apurva G

[Plater]

No.
Split would be the prefered method. If there were a method, it would probably use Split().

[balabaster]

I provided a method for this in the following thread:

http://bytes.com/forum/thread790709.html

It still relies on the Split() function, however, as far as your procedural code goes, it might be a little clearer. I built a class called NameValueCollectionEx that takes a string in the format you specified after which it functions as if it were a regular NameValueCollection object...with the exception that you can then return all the items in the collection as another data string.

Dim oNVC As New NameValueCollectionEx("Value1=1&Value2=2&Value3=3")
 
'You can then reference items in the collection like:
Dim Val1 As String = oNVC("Value1")
Dim Val2 As String = oNVC("Value2")
Dim Val3 As String = oNVC("Value3")
 
'Viewing items in the collection as a NameValue string:
Dim sOut As String = oNVC.DataString
'Output would be
' "Value1=New Value&Value2=2&Value3=3"
 
'Modifying items
oNVC("Value1") = "New Value"
 
'Removing items:
oNVC.Item("Value2").Remove
Dim sOut As String = oNVC.DataString
' Output would be
' "Value1=New Value&Value3=3"
 
'Adding items:
oNVC.Add("Value1", "FirstItem")
oNVC.Add("Value2", "SecondItem")
oNVC.Add("Value3", "ThirdItem)