[英]List view not updating in vb.net
我正在尝试使用VB.net将来自Web服务的播放列表信息显示到列表视图对象中
我设法从服务中获取XML,并将其转换为Strings,并创建了一个循环以将信息输入列表视图。 问题在于它总是多次从第一首歌曲输入信息
Web服务的结果如下所示
for循环内部的控制台日志为:
<name>Test Song one</name><artist>The tested</artist><album>To test</album>
<name>Test two</name><artist>the Tested</artist><album>To test</album>
<name>Test 3</name><artist>Tested</artist><album>To test</album>
这是此方法的代码:
serviceReturn = service.getList(txtPlaylist.Text)
MessageBox.Show(serviceReturn)
Dim doc As New XmlDocument
Dim result As XmlElement = doc.CreateElement("playlist")
result.InnerXml = serviceReturn
Dim lstName As XmlNode = result.SelectSingleNode("/name")
Dim results As XmlNodeList
results = result.GetElementsByTagName("song")
lstSong.Items.Add(lstName.InnerText)
Dim songNod As XmlNode
Dim listName As ListViewItem
For Each songNod In results
listName = New ListViewItem
Console.WriteLine(songNod.InnerXml)
Dim lstSongName As XmlNode = songNod.SelectSingleNode("/song/name")
Dim lstSongArtist As XmlNode = songNod.SelectSingleNode("/song/artist")
Dim lstSongAlbum As XmlNode = songNod.SelectSingleNode("/song/album")
listName = New ListViewItem(lstSongName.InnerText)
listName.SubItems.Add(lstSongArtist.InnerText)
listName.SubItems.Add(lstSongAlbum.InnerText)
detailedView.Items.Add(listName)
listName = Nothing
lstSongName = Nothing
lstSongArtist = Nothing
lstSongAlbum = Nothing
Next
谁能指出为什么每次都只打印第一首歌?
任何帮助,将不胜感激。
尝试以这种方式更改XPath表达式
Dim lstSongName As XmlNode = songNod.SelectSingleNode("./name")
Dim lstSongArtist As XmlNode = songNod.SelectSingleNode("./artist")
Dim lstSongAlbum As XmlNode = songNod.SelectSingleNode("./album")
您需要引用当前节点,就像现在一样,您始终引用/playlist/song
相同的第一个节点
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