下面的代碼在Windows Phone 8的工作，但是當我轉換成的Windows Phone 8.1 NavigationContext不工作

Question

當我試圖聲明NavigationContext我在Windows手機收到錯誤8.1

public static string GetFeedbackMailMessage(NavigationContext context) 
{ 
    string VideoTitle = string.Empty; 
    string LinkType = string.Empty; 
    string VideoUrl = string.Empty; 
    string ShowTitle = string.Empty; 
    string FeedbackMessage = string.Empty; 

    context.QueryString.TryGetValue("chno", out VideoTitle); 
    context.QueryString.TryGetValue("LinkType", out LinkType); 
    context.QueryString.TryGetValue("uri", out VideoUrl); 
    context.QueryString.TryGetValue("title", out ShowTitle); 
    if (context.QueryString.TryGetValue("chno", out VideoTitle) && context.QueryString.TryGetValue("LinkType", out LinkType) && context.QueryString.TryGetValue("uri", out VideoUrl) && context.QueryString.TryGetValue("title", out ShowTitle)) 
    { 
     FeedbackMessage = "Movie Name : " + ShowTitle + "\n" + VideoTitle + " \n " + "http://m.youtube.com/watch?v=" + VideoUrl + "\n"; 
    } 
    return FeedbackMessage; 
} 

Answer 1

試試這個

string ShowTitle = NavigationContext.QueryString["title"]; 

入住這也：http://mtaulty.com/CommunityServer/blogs/mike_taultys_blog/archive/2014/05/23/windows-phone-8-1-frame-page-navigationhelper-suspensionmanager.aspx