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當我的應用程序啓動時，我想顯示啓動畫面並創建httpwebrequest，並在請求完成時隱藏啓動畫面並顯示主頁面。完成Web請求後顯示啓動畫面並隱藏
這是我的啓動畫面：
private void ShowPopup()
{
this.popup = new Popup();
this.popup.Child = new PopupSplash();
this.popup.IsOpen = true;
StartLoadingData();
}
private void StartLoadingData()
{
backgroundWorker = new BackgroundWorker();
backgroundWorker.DoWork += new DoWorkEventHandler(backgroundWorker_DoWork);
backgroundWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(backgroundWorker_RunWorkerCompleted);
backgroundWorker.RunWorkerAsync();
}
void backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
this.Dispatcher.BeginInvoke(() =>
{
this.popup.IsOpen = false;
}
);
}
void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
using (var db = new ListDataContext(ListDataContext.DBConnectionString))
{
if (!db.DatabaseExists())
{
db.CreateDatabase();
}
}
Thread.Sleep(4000);
}
，這是我的HttpWebRequest：
private void main_WebResponseAvailableEventHandler(object sender, string response, string url)
{
SearchResult result = new SearchResult(response, url);
PhoneApplicationService.Current.State["result"] = result;
this.NavigationService.Navigate(new Uri("/SearchPivotPage.xaml", UriKind.Relative));
}
private void HandleWebResponse(IAsyncResult asyncResult)
{
WebRequestState state = (WebRequestState)asyncResult.AsyncState;
HttpWebRequest request = state.Request;
string url = request.RequestUri.ToString();
state.Response = (HttpWebResponse)request.EndGetResponse(asyncResult);
if (state.Response != null)
{
StreamReader reader = new StreamReader(state.Response.GetResponseStream());
StringBuilder sb = new StringBuilder();
while (!reader.EndOfStream)
sb.Append(reader.ReadLine());
string text = sb.ToString();
Dispatcher.BeginInvoke(() =>
{
if (WebResponseAvailable != null)
{
WebResponseAvailable(this, text, url);
}
});
}
}
在構造函數中的MainPage（）
....
ShowPopup();
HttpWebRequest movieRequest = (HttpWebRequest)WebRequest.Create(url);
WebRequestState state = new WebRequestState();
state.Request = movieRequest;
movieRequest.BeginGetResponse(new AsyncCallback(HandleWebResponse), state);
WebResponseAvailable += main_WebResponseAvailableEventHandler;
....
有沒有一種方法，我該怎麼辦我想要的是？或者說這兩者都在其他線程中，這是不可能的？