run WebClient.DownloadStringCompleted before loading MainPage_Loaded in silverlight [closed]

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I开发者_如何学运维 want to load this event handler before MainPage_Loaded

WebClient wc = new WebClient(); 

wc.DownloadStringCompleted += new 
DownloadStringCompletedEventHandler(wc_DownloadStringCompleted);

wc.DownloadStringAsync(new Uri("./ImageList.xml", UriKind.Relative));

void wc_DownloadStringCompleted(object sender, 
    System.Net.DownloadStringCompletedEventArgs e){.....}

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I think this was the question
I want to "load some resources" "Asynchronously" before loading the MainPage!

WebClient wc = new WebClient(); 

wc.DownloadStringCompleted += 
            new DownloadStringCompletedEventHandler(wc_DownloadStringCompleted);

wc.DownloadStringAsync(new Uri("./ImageList.xml", UriKind.Relative));

void wc_DownloadStringCompleted(object sender, System.Net.DownloadStringCompletedEventArgs e){.....}

Answer

If it is the main page of your application so you can add this code to "app.xaml.cs" in Application_Startup event handler. note that since you are loading the resource asynchronously then you should load the main page in your event handler not Application_Startup unless you don’t care if the Main page got loaded before completion of the resource loading process.