在以下网页上,我想在我的listbox1中获取youtube视频的所有标题
Dim webRequest As WebRequest = webRequest.Create("https://www.youtube.com/results?q=test")
Dim webresponse As WebResponse = webRequest.GetResponse()
Dim sr As System.IO.StreamReader = New System.IO.StreamReader(webresponse.GetResponseStream())
Dim youtube As String = sr.ReadToEnd
Dim r As New System.Text.RegularExpressions.Regex("title="".*""")
Dim matches As MatchCollection = r.Matches(youtube)
For Each itemcode As Match In matches
ListBox1.Items.Add(itemcode.Value.Split("""").GetValue(1))
然而,使用这段代码我得到了标题,但也有很多其他的东西......
答案 0 :(得分:1)
YouTube提供了API,这可能是获取此信息的更好方式。您要进行的具体通话记录在此处:https://developers.google.com/youtube/v3/docs/search/list。
要使用YouTube API,您需要创建API密钥。这可以从Google developers console完成。获得密钥后,您可以拨打YouTube电话来搜索视频,获取视频信息等
使用您的代码作为基础,您可以使用以下内容:
Dim url As String = "https://www.googleapis.com/youtube/v3/search?part=snippet&q=test&maxResults=50&key={YOUR-API-KEY}"
Dim webRequest As WebRequest = webRequest.Create(url)
Dim webresponse As WebResponse = webRequest.GetResponse()
Dim sr As System.IO.StreamReader = New System.IO.StreamReader(webresponse.GetResponseStream())
Dim youtube As String = sr.ReadToEnd
Dim r As New System.Text.RegularExpressions.Regex("""title"": "".*""")
Dim matches As MatchCollection = r.Matches(youtube)
For Each itemcode As Match In matches
ListBox1.Items.Add(itemcode.Value.Split(":").GetValue(1).Trim().TrimStart("""").TrimEnd(""""))
Next
q
参数指定搜索查询。这将获得您搜索的前50个匹配项,并将它们放入您的下拉列表中。
答案 1 :(得分:0)
如果您想坚持使用正则表达式,请尝试以下
Dim r As New System.Text.RegularExpressions.Regex("title=""([^""]*)""")
Dim matches As MatchCollection = r.Matches(youtube)
For Each itemcode As Match In matches
ListBox1.Items.Add(itemcode.Groups(1))
Next
然而,专用API更清晰