商业编程-源码-关于CFileDialog对话框多选功能的一个问题.zip资源-CSDN文库

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在Windows编程中，`CFileDialog` 是MFC（Microsoft Foundation Classes）库中一个非常重要的类，用于创建标准的文件打开和保存对话框。这个类是`CDialog` 的派生类，提供了对Windows API中的`FileDialog` 功能的封装。在商业软件开发中，`CFileDialog` 的使用十分常见，因为它能帮助开发者快速实现与用户交互的文件选择界面。标题和描述中提到的问题主要聚焦在`CFileDialog` 的多选功能上。默认情况下，`CFileDialog` 实例通常只允许用户选择单个文件。然而，在某些场景下，如批量处理或文件集合的选择，我们可能需要开启多选功能。`CFileDialog` 提供了这样的选项，允许用户一次选择多个文件。要启用`CFileDialog` 的多选功能，我们需要在创建`CFileDialog` 对象时设置相应的标志。具体来说，我们可以通过传递`OFN_ALLOWMULTISELECT` 标志到`CFileDialog` 构造函数的`dwFlags` 参数来实现。例如： ```cpp CFileDialog fileDlg(TRUE, NULL, NULL, OFN_ALLOWMULTISELECT, _T("All Files (*.*)|*.*"), NULL); ``` 这段代码创建了一个可打开文件的对话框，其中`TRUE` 表示这是一个打开对话框，`NULL` 表示默认文件名为空，`OFN_ALLOWMULTISELECT` 开启了多选功能。`_T("All Files (*.*)|*.*")` 是文件类型过滤器，允许用户选择所有类型的文件。当用户选择多个文件后，`CFileDialog` 的`GetPathName` 函数将返回第一个选中的文件路径，而`GetStartPosition` 和`GetNextPathName` 则可以用来遍历并获取所有选定的文件路径。例如： ```cpp POSITION pos = fileDlg.GetStartPosition(); while (pos != NULL) { CString filePath; filePath = fileDlg.GetNextPathName(pos); // 处理每个选定的文件路径 } ``` 这个过程可以遍历所有选定的文件，`filePath` 将依次存储每个文件的完整路径。需要注意的是，当使用多选功能时，文件名可能会以列表的形式返回，比如"file1.txt;file2.txt;file3.txt"，这时需要自行解析这些字符串以获取单独的文件名。另外，如果用户在对话框中同时选择了不同路径下的多个文件，返回的路径会包含完整的目录结构。 `CFileDialog` 的多选功能是通过`OFN_ALLOWMULTISELECT` 标志开启的，并且可以通过`GetStartPosition` 和`GetNextPathName` 来遍历所有选定的文件。正确理解和使用这些功能对于编写能够处理用户批量选择文件的商业软件至关重要。

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商业编程-源码-关于 CFileDialog 对话框多选功能的一个问题.zip （22个子文件）

关于 CFileDialog 对话框多选功能的一个问题

OpenFileDlg3

StdAfx.cpp 205B

111.plg 2KB

111.opt 48KB

111.dsp 4KB

111.h 1KB

MainFrm.h 2KB

111.ncb 41KB

111.cpp 4KB

ChildView.cpp 1KB

TraceWin.h 6KB

ChildView.h 1KB

Debug

111.exe 112KB

TraceWin.exe 37KB

ReadMe.txt 4KB

StdAfx.h 999B

111.rc 9KB

111.dsw 529B

MainFrm.cpp 4KB

Resource.h 490B

res

111.rc2 395B

111.ico 1KB

Toolbar.bmp 718B

**************************** 华软源码：http://www.hur.cn **************************** ======================================================================== MICROSOFT FOUNDATION CLASS LIBRARY : 111 ======================================================================== AppWizard has created this 111 application for you. This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application. This file contains a summary of what you will find in each of the files that make up your 111 application. 111.dsp This file (the project file) contains information at the project level and is used to build a single project or subproject. Other users can share the project (.dsp) file, but they should export the makefiles locally. 111.h This is the main header file for the application. It includes other project specific headers (including Resource.h) and declares the CMy111App application class. 111.cpp This is the main application source file that contains the application class CMy111App. 111.rc This is a listing of all of the Microsoft Windows resources that the program uses. It includes the icons, bitmaps, and cursors that are stored in the RES subdirectory. This file can be directly edited in Microsoft Visual C++. 111.clw This file contains information used by ClassWizard to edit existing classes or add new classes. ClassWizard also uses this file to store information needed to create and edit message maps and dialog data maps and to create prototype member functions. res\111.ico This is an icon file, which is used as the application's icon. This icon is included by the main resource file 111.rc. res\111.rc2 This file contains resources that are not edited by Microsoft Visual C++. You should place all resources not editable by the resource editor in this file. ///////////////////////////////////////////////////////////////////////////// For the main frame window: MainFrm.h, MainFrm.cpp These files contain the frame class CMainFrame, which is derived from CFrameWnd and controls all SDI frame features. res\Toolbar.bmp This bitmap file is used to create tiled images for the toolbar. The initial toolbar and status bar are constructed in the CMainFrame class. Edit this toolbar bitmap using the resource editor, and update the IDR_MAINFRAME TOOLBAR array in 111.rc to add toolbar buttons. ///////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////// Other standard files: StdAfx.h, StdAfx.cpp These files are used to build a precompiled header (PCH) file named 111.pch and a precompiled types file named StdAfx.obj. Resource.h This is the standard header file, which defines new resource IDs. Microsoft Visual C++ reads and updates this file. ///////////////////////////////////////////////////////////////////////////// Other notes: AppWizard uses "TODO:" to indicate parts of the source code you should add to or customize. If your application uses MFC in a shared DLL, and your application is in a language other than the operating system's current language, you will need to copy the corresponding localized resources MFC42XXX.DLL from the Microsoft Visual C++ CD-ROM onto the system or system32 directory, and rename it to be MFCLOC.DLL. ("XXX" stands for the language abbreviation. For example, MFC42DEU.DLL contains resources translated to German.) If you don't do this, some of the UI elements of your application will remain in the language of the operating system. /////////////////////////////////////////////////////////////////////////////

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