如何使用MVVM Light从一个页面传递查询字符串参数并在WP 7中获取另一个参数

Question

I am developing application in Windows Phone 7 in MVVM arhticeture. I have never worked with MVVM Light. But today for sending querystring parameters from ViewModel of first Page to another, I have searched google and found that I have to use MVVMLight. But I cant find any tutorial or working sample. I have found one that it navigates from one page to another, but without parameters.

UPDATE How to change this solution that in can get parameters from OrderViewModel? code can be found here

Answer 1

You use a concept called messaging. Read more on Geoff's Blog: MVVM Light - Passing Params to Target ViewModel Before Navigating .

Basically, you send a message of some type (represented by a C# class) and the target ViewModel registers itself as the recipient of that message. Once you broadcast the message, the other view model will be called.