How to find hyperlinks in a word document? - vb.net

Question

I'm working on a VB 2015 and I have a problem.
I want to find hyperlinks in a word document containing a paragraph with several words containing hyperlinks. How can I find all the hyperlinks and list them in a text file or textbox?
Public Class Form1
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim wa As Microsoft.Office.Interop.Word.Application
Dim wd As Microsoft.Office.Interop.Word.Document
Dim wp As Microsoft.Office.Interop.Word.Paragraph
wa = CreateObject("Word.Application")
wa.Visible = False
wd = wa.Documents.Add
wp = wd.Content.Paragraphs.Add
wp.Range.Paste()
wd.SaveAs("F:\sample.docx")
Dim colHyperlinks As String = wd.Hyperlinks.ToString
For Each objHyperlink In colHyperlinks
TextBox1.Text = objHyperlink.TextToDisplay
Next
wa.Quit()
End Sub
End Class

Answer 1

As mentioned in the comment's above, you are declaring a string type on a Word.Hyperlinks collections object. Therefore you would only ever get one string and not any others. Please see code below, comment's on what it does...
Note: Code tried and tested
'returns a collection of links, not a string
Dim colHyperlinks As Word.Hyperlinks = wd.Hyperlinks()
This code below is just a LINQ statement to get all hyperlinks into a List(Of String). You can loop through if you want and then add them to the Textbox if you wish...
'get all the hyperlinks
Dim arr As List(Of String) = (From hl As Word.Hyperlink In colHyperlinks Select hl.TextToDisplay).ToList()
'show the url's
TextBox1.Text = String.Join(Environment.NewLine, arr)
Or in just one line if you wish...
TextBox1.Text = String.Join(Environment.NewLine, (From hl As Word.Hyperlink In colHyperlinks Select hl.TextToDisplay).ToList())