以下代码适用于Windows Phone 8，但当我转换为Windows Phone 8.1时，NavigationContext不起作用

Question

当我尝试声明NavigationContext时，我在Windows Phone 8.1中收到错误

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

试试这个

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

另请检查：http://mtaulty.com/CommunityServer/blogs/mike_taultys_blog/archive/2014/05/23/windows-phone-8-1-frame-page-navigationhelper-suspensionmanager.aspx