I know two start page page
Pages. Pg_c_rbb ps=new Pages. Pg_c_rbb (extraData);
FrameWork. The Content=new Frame () {Content=ps};
Or
String pgname="Pages \ \ Pg_c_rbb xaml";
FrameWork. Navigate (new Uri (pgname, UriKind. Relative));
The former, you can pass, but I will start page page name is placed in string variable;
The latter, can start the string variable in the page, but couldn't pass parameters,
How to do both?