VB的Silverlight for Windows Phone支持 「DownloadStringAsync」

Question

Windows Phone的你好我正在開發的應用程序，我想，所以我使用的頁面加載事件從網絡 讀取XML：

Dim cl As New WebClient AddHandler cl.DownloadStringCompleted, AddressOf cl_DownloadStringCompleted cl.DownloadStringAsync(New Uri("demo.com/1.xml",UriKind.RelativeOrAbsolute))

和在cl.DownloadStringCompleted事件：

Dim doc = XDocument.Load("demo.com/1.xml")

，但由於某種原因，我崩潰！ 該錯誤必須是我沒有使用URI：「demo.com/1.xml」，但其他一些：S

Answer 1

DownloadStringCompleted事件有DownloadStringCompletedEventArgs。您應該使用這些參數的Result屬性。

Dim client As New WebClient() 
AddHandler client.DownloadStringCompleted, AddressOf ClientOnDownloadStringCompleted 
client.DownloadStringAsync(New Uri("http://demo.com/xml")) 

和處理程序：

Private Sub ClientOnDownloadStringCompleted(sender As Object, args As DownloadStringCompletedEventArgs) 
    Dim doc = XDocument.Parse(args.Result) 
End Sub