我是 windows phone 开发的新手,我想知道 WP7 中是否有类似 timedelay 的东西。
因为我想在图像完全加载后几秒钟后显示弹出窗口(比如 5 秒后我需要自动打开一个弹出窗口)而不点击任何按钮。
到目前为止,我正在这样做,但它会在图像加载后立即打开 Popup。
Public Sub New()
InitializeComponent()
photoChooserTask = New PhotoChooserTask()
AddHandler photoChooserTask.Completed, AddressOf photoChooserTask_Completed
End Sub
Dim photoChooserTask As PhotoChooserTask
添加图片:
Private Sub AddImage_Click(sender As System.Object, e As System.EventArgs)
Try
photoChooserTask.Show()
Catch ex As System.InvalidOperationException
MessageBox.Show("An error occurred.")
End Try
End Sub
加载图像后:
Private Sub photoChooserTask_Completed(sender As Object, e As PhotoResult)
If e.TaskResult = TaskResult.OK Then
'Code to display the photo on the page in an image control named myImage.
Dim bmp As System.Windows.Media.Imaging.BitmapImage = New System.Windows.Media.Imaging.BitmapImage()
bmp.SetSource(e.ChosenPhoto)
myImage.Source = bmp
End If
Dim popup As New Popup()
popup.VerticalOffset = 140
Dim control As New PhonePage3()
popup.Child = control
popup.IsOpen = True
End Sub
End Sub