asp.net - htmlのタグから href を取得する

Answer 1

わかりました、私はこれを得ることができたと思います:

        If strContent.Contains(".mp3""") Then  'check if content contains .mp3

            'find the href tag usin regex 
            Dim pattern As String = "(href=\s*\""(.+?)\"")"
            Dim html As String = strContent
            Dim href() As String = Regex.Split(html, pattern)
            Dim href1 As String = href(1) 'gets the href tag

            'make sure that this href contains contains .mp3 (and it's not some other)
            If href1.Contains(".mp3""") Then 

                'this is a hidden control to display on summary main category page                                         
                Dim atemp As hyperlink = e.Item.FindControl("lnkSound") 

                 'remove the href= and quotes from the href  

                'set the naviate url
                atemp.navigateurl = href1.Replace("href=", "").Replace(chr(34), "")
                atemp.target = "_blank"

                'make it visible as hidden for summarys that don't contain .mp3
                atemp.visible = True

            End If
        End If

並べ替えました。