Question

我试图从youtube或谷歌获得第一个youtube链接，但我无法让它工作。有人可以帮帮我吗？

Dim m As New Regex("<a href=""/watch?v=.*""")

Dim request2 As System.Net.HttpWebRequest = System.Net.HttpWebRequest.Create("https://www.youtube.com/results?search_query=" + ListBox1.SelectedItem + " " + ListBox2.SelectedItem)

    Dim responseyoutube As System.Net.HttpWebResponse = request2.GetResponse
    TextBox2.Text = (request2.Address.ToString)
    Dim sr As System.IO.StreamReader = New System.IO.StreamReader(responseyoutube.GetResponseStream())
    Dim rssourcecodey As String = sr.ReadToEnd
    Dim matches As MatchCollection = m.Matches(rssourcecodey)
    TextBox1.Text = rssourcecodey

    For Each itemcode2 As Match In matches
        youtube = itemcode2.Value.Split("=").GetValue(1)

        ListBox2.Items.Add(youtube)

Answer 1

?是regex中的一个特殊元字符，它将前一个标记作为可选标记（不是*或+之后的标记）。因此，您需要按顺序转义?符号才能匹配文字?符号。

Dim m As New Regex("<a href=""/watch[?]v=.*""")

OR

Dim m As New Regex("<a href=""/watch\\?v=.*""")

从Youtube VB.NET获得第一个视频

1 个答案: