在C++ MFC中Single document和Dialog based有什么具体的区别？

csdn 回答

在我个人看来有两个区别

1,SDI比dialog based有更丰富的默认窗体，比如，默认的菜单，

2,SDI有document-view的代码结构，而DIALOG based没有这个D-V结构

总结一下就是，DIALOG BASED趋向于做任务非常单一的小程序，所有的任务可以在一个窗体完成的

而SDI会复杂一点

但是界限不明显，因为DIALOG BASED也可以做成非常复杂的窗体

只是SDI默认就多了一些支持

stackoverflow回答：
http://stackoverflow.com/questions/660843/choosing-between-a-dialog-based-vs-sdi-projects
If you select an SDI project you get a whole Model-View-Controller framework included. You get a document class (inheriting from CDocument) which ideally should hold all of the data, and a view class (inheriting from CView) to do with the display. You get
given a hosting frame with a menu already attached, and there are functions you can override to save and load to file.

If you have a dialog based application, then you get one dialog. That's it. Of course, this dialog can spawn off others, but the application essentially consists of a dialog.

If you're developing a small application that just does one task, a dialog application is appropriate, because you don't need the overhead.