VB的Silverlight for Windows Phone支持 “DownloadStringAsync”

Question

Windows Phone的你好我正在开发的应用程序，我想，所以我使用的页面加载事件从网络 读取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")

，但由于某种原因，我崩溃！ 该错误必须是我没有使用URI：“demo.com/1.xml”，但其他一些：S

Answer 1

DownloadStringCompleted事件有DownloadStringCompletedEventArgs。您应该使用这些参数的Result属性。

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

和处理程序：

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