，怎样实现打开？在线等待

[clin2y]

我用建立一个基于Form的单文档应用程序，并将文档扩展名命名为.cmp，现在双击任何.cmp文件，能够执行我的应用程序，可是我文件的内容打不开。我重载了OnFileOpen(),所以直接用文件下的‘打开’可以实现文件的打开，要解决的问题是,怎样实现双击文件打开呢？

[hnyyy]

单文档应用程序你不必重载OnFileOpen()，确实不想使用其默认的序列化保存文件的话，可以将代码写在OnOpenDocument(LPCTSTR lpszPathName)内。

[qrlvls]

应该通过序列化的方法来处理

[xyw2278]

VC向导只是帮助你关联你的文件和应用程序

至于到底怎么打开你自己的文件
你的自己的编写具体的代码
用CFile类
Open
和
Read
及
Write
来完成你所需要的工作

[cheng_young]

add vc component: Document registration

[masterz]

Working with the Associations
Whenever a certain file extension say, ".abd", has to be associated with a particular program, a key named ".abd" has to be created under the HKEY_CLASSES_ROOT root key in the Windows Registry. The default value is then set to a short identifier for the file type; in this case, it could be "abd_ext" (NOTE: The identifier should not have any spaces in it!). Next, another key, by the name of the identifier, is created under the HKEY_CLASSES_ROOT root key, and its default value is set to a short description of the file type (for example, "My own file type"). Under the identifier key, a key called "Defaulticon" is created, and its default value is set to the complete path of the icon that is to be shown for files having that extension. Also, under the identifier key, another key by the name of "shell" is created. This key contains all the file commands that are registered for the given file extension (as in "Open", "Print", "Preview", and so forth). Within the "shell" key, one key for each file command is created, using the name of the command, say, for example, "Open". Now, within the "Open" key (or whatever command is being set), another key, called "command" is created. The default value of this key is set to the complete path of the program to be used, along with whatever command line parameters are neccessary; for example "c:\windows\notepad.exe" "%1".

That's it! Having done all that, the file extension will be registered with the chosen program. Shown below is a screenshot taken in Regedit, showing the Registry keys and tree that are created to register the .abd file extension with the program "c:\Program files\app.exe", using the identifier abd_ext. Also, another file command, "Print", has been registered for this file type.

Q122787
SAMPLE: FileAsso.exe Demonstrates How to Use File Associations

[clin2y]

hnyyy(前进) :
我的Form里有树控件，而且要将.cmp文件里的某些内容初始化到树里，怎么办呢？我企图给FormView发送消息，但是执行OnOpenDocument(LPCTSTR lpszPathName）时，FormView还没有产生呀.

[hnyyy]

OnOpenDocument(LPCTSTR lpszPathName）里只负责读出数据，至于初始化到树里，那应放在FormView里了。

[hnyyy]

不需要在OnOpenDocument(LPCTSTR lpszPathName）里向FormView发送消息，比如放在FormView的OnInitialUpdate()中应该就可以初始化。