WP7中图片设置成Content和Resource的区别

在WP7项目，图片资源文件的属性对话框Properties，在Build Action项有很多选项，但WP7中只支持：Content、Resource、none这三种。

设置为Content时会直接将图片文件打包到XAP文件中，就是说用ZIP查看器可以直接看到你的图片文件；

设置为Resource后，图片会编译到XAP的Dll文件内；

设置为none后，图片既不会直接打包在xap文件中，也不会嵌入xap中的dll内，编译过程会完全忽略该文件。

一般情况下，用Content更简单，能获得更好的效率。

MSDN的原文：

Set Build Action to Content for Media

Media processing on Windows Phone is optimized to use files and network streams, but not in-memory streams. This means that any media files included in the application, such as sound effects, should have their Build Action set to Content and not Resource. When a media file is compiled as content, it is stored as a loose file alongside the application file (.XAP) and is not stored inside it. When a media file is compiled as a resource, you typically access it by retrieving a stream to the file, which can decrease performance. Also, when a media file compiled as content is played back, it is played directly. When a media file is compiled as a resource, the content is copied to a file on Windows Phone before playback, which decreases performance. The following illustration shows how to set the Build Action of a file in Visual Studio.

有关Build Action的相关内容，参考这里