如何从具有键值对的属性列表集合中获取键列表

Question

I have a collection of list of properties with key value pairs as follow screenshot in visual studio.

UPDATE:

I have the following screenshot if i expend the value(0) on the above screenshot.

How can I get a list (List (of string) may be?) with Key values from that?

For example, the new list will contain, {Id, Class Name, Forename, Surname, Dob}. No need to filter anything.

Many Thanks

Answer 1

If your list is a collection of KeyValue pairs then can you not just iterate this collection and build up a new list of strings representing the Key

   Dim l2 As New List(Of String)
    For Each kvp As KeyValuePair(Of String, String) In res(0)
        l2.Add(kvp.Key)
    Next

Answer 2

Here is an example. In this example, the key for each KeyValuePair is a String, but it might not always be, so there is an explicit .ToString() just in case the keys are another type.

Dim myList As New List(Of KeyValuePair(Of String, Object))
' add stuff to myList here

Dim keyList as List(Of String)
For Each item In myList
    keyList.Add(item.Key.ToString())
Next item

EDIT: Try this:

' add stuff to myList here

Dim keyList as List(Of String)
For Each entry in res
    For Each item In entry._values
            keyList.Add(item.Key.ToString())
    Next item
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