MFC应用程序首次启动时如何禁用自动创建文档/视图 [英] How to disable auto document/view creation when MFC application first starts

问题描述

我有一个使用Doc/View体系结构的常规MFC应用程序.当应用程序启动时，它会自动创建一个空文档的视图.我想在启动时禁用此自动视图，仅在用户从文件"菜单中单击新建文档"时显示视图.

I have a regular MFC application which uses Doc/View architecture. When the application starts it automatically creates a view of an empty document. I want to disable this automatic view on startup and show a view only when the user clicks on "New Document" from the File menu.

有什么办法吗?

CMultiDocTemplate* template = new CMultiDocTemplate(IDR_DorlionTYPE,
        RUNTIME_CLASS(CDocument),
        RUNTIME_CLASS(CChildFrame), // custom MDI child frame
        RUNTIME_CLASS(CView));
    if (!CView)
        return FALSE;

推荐答案

标准MFC(由向导生成)代码假定，如果程序仅由其自身运行，则您始终希望看到一个新文档(与双击不同).在数据文件上运行或使用命令行选项运行它以打开文件)；在对ProcessShellCommand()的调用之前插入以下行以禁用此功能":

Standard MFC (wizard generated) code assumes that you would always want to see a new document if the program is just run by itself (as opposed to double-clicking on the data file or running it with a command-line option to open the file); insert the following lines before the call to ProcessShellCommand() to disable this "feature":

if (cmdInfo.m_nShellCommand == CCommandLineInfo::FileNew)   // actually none
    cmdInfo.m_nShellCommand = CCommandLineInfo::FileNothing;

[如果您有兴趣，可以逐步浏览ParseCommandLine()的MFC源代码，如果命令行中没有任何内容，则它将m_nShellCommand设置为CCommandLineInfo::FileNew]

[if you are interested, you can step through the MFC source code for ParseCommandLine() where it sets m_nShellCommand to CCommandLineInfo::FileNew if there's nothing in the command line]

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