CODEWITHSUNDEEP
vb.netvisual-studio-2019
KR32
KR32

Reputation: 561

Collection to string() convertion in vb.net

I'm a beginner.my question is, I have an observablecollection(of string)

How can I add those collection's each elements as an array of string elements Using for loop?

Dim obsv as new observablecollection(of string) // has some collection of string

For each str in obsv

// How can I add that str into string Array

Next

Upvotes: 0

Views: 1517

Answers (1)

Youssef13
Youssef13

Reputation: 4954

You can use LINQ .ToArray() method. Or use the Item[Int32] property.

Dim s As ObservableCollection(Of String)
' Whatever code to fill that collection.

' First solution:
Dim arr1 = s.ToArray() ' This needs the System.Linq namespace to be imported.

' Second solution:
Dim arr2(s.Count - 1) As String
For i As Integer = 0 To s.Count - 1
   arr2(i) = s.Item(i)
Next

And here is a complete working code snippet:

Imports System
Imports System.Collections.ObjectModel
Imports System.Linq

Public Module Module1
    Public Sub Main()
        Dim s As New ObservableCollection(Of String)()
        s.Add("Hello")
        s.Add("World")
        ' Whatever code to fill that collection.

        ' First solution:
        Dim arr1 = s.ToArray() ' This needs the System.Linq namespace to be imported.
        Console.WriteLine("First array:")
        Console.WriteLine(String.Join(", ", arr1))
        Console.WriteLine()

        ' Second solution:
        Dim arr2(s.Count - 1) As String
        For i As Integer = 0 To s.Count - 1
            arr2(i) = s.Item(i)
        Next
        Console.WriteLine("Second array:")
        Console.WriteLine(String.Join(", ", arr2))
    End Sub
End Module

Output is:

First array:
Hello, World

Second array:
Hello, World

Or if you want to use For Each loop, you can do it like that:

Dim arr2(s.Count - 1) As String
Dim i As Integer = 0
For Each str In s
    arr2(i) = str
    i += 1
Next

Upvotes: 1

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