すべての相対 URL を絶対 URL に変換する必要がある場合は、次の関数を使用します。
Private Function ConvertALLrelativeLinksToAbsoluteUri(ByVal html As String, ByVal PageURL As String)
Dim result As String = Nothing
' Getting all Href
Dim opt As New RegexOptions
Dim XpHref As New Regex("(href="".*?"")", RegexOptions.IgnoreCase)
Dim i As Integer
Dim NewSTR As String = html
For i = 0 To XpHref.Matches(html).Count - 1
Application.DoEvents()
Dim Oldurl As String = Nothing
Dim OldHREF As String = Nothing
Dim MainURL As New Uri(PageURL)
OldHREF = XpHref.Matches(html).Item(i).Value
Oldurl = OldHREF.Replace("href=", "").Replace("HREF=", "").Replace("""", "")
Dim NEWURL As New Uri(MainURL, Oldurl)
Dim NewHREF As String = "href=""" & NEWURL.AbsoluteUri & """"
NewSTR = NewSTR.Replace(OldHREF, NewHREF)
Next
html = NewSTR
Dim XpSRC As New Regex("(src="".*?"")", RegexOptions.IgnoreCase)
For i = 0 To XpSRC.Matches(html).Count - 1
Application.DoEvents()
Dim Oldurl As String = Nothing
Dim OldHREF As String = Nothing
Dim MainURL As New Uri(PageURL)
OldHREF = XpSRC.Matches(html).Item(i).Value
Oldurl = OldHREF.Replace("src=", "").Replace("src=", "").Replace("""", "")
Dim NEWURL As New Uri(MainURL, Oldurl)
Dim NewHREF As String = "src=""" & NEWURL.AbsoluteUri & """"
NewSTR = NewSTR.Replace(OldHREF, NewHREF)
Next
Return NewSTR
End Function