MFC中获取命令行参数的几种方法

不妨假设应用程序名为CmdTest，在命令行输入CmdTest Hello World

方法一:

 CString str = ::GetCommandLine();
 ASSERT(0 == str.Compare("CmdTest Hello World"));

方法二:

 ASSERT(3 == __argc);
 ASSERT(0 == strcmp(__argv[0],"CmdTest"));
 ASSERT(0 == strcmp(__argv[1],"Hello"));
 ASSERT(0 == strcmp(__argv[2],"World"));

方法三:

 ASSERT(0 == strcmp("Hello World",AfxGetApp()->m_lpCmdLine));

方法四:

使用MFC中的CCommandLineInfo类。

首先，将下面的代码注释，主要是不要生成对话框。

 CCmdTestDlg dlg;
 m_pMainWnd = &dlg;
 int nResponse = dlg.DoModal();
 if (nResponse == IDOK)
 {
     // TODO: Place code here to handle when the dialog is
     //  dismissed with OK
 }
 else if (nResponse == IDCANCEL)
 {
     // TODO: Place code here to handle when the dialog is
     //  dismissed with OK
 }

创建CCommandLineInfo的派生类

 //MyCmdLineInfo.h
 class CMyCmdLineInfo : public CCommandLineInfo
 {
 public:
     CMyCmdLineInfo();
     virtual ~CMyCmdLineInfo();

     virtual void ParseParam(const char* pszParam, BOOL bFlag, BOOL bLast);

     CStringArray m_arCommd;
 };

 //MyCmdLineInfo.cpp
 CMyCmdLineInfo::CMyCmdLineInfo()
 {
     m_arCommd.RemoveAll();
 }

 CMyCmdLineInfo::~CMyCmdLineInfo()
 {

 }

 void CMyCmdLineInfo::ParseParam(const char* pszParam, BOOL bFlag, BOOL bLast)
 {
     CString str = pszParam;
     m_arCommd.Add(str);
 }

在CCmdTestApp::InitInstance最后，return FALSE之前加上，注意要#include对应头文件

         CMyCmdLineInfo  cmdInfo;
     cmdInfo.m_nShellCommand = CCommandLineInfo::FileNothing;
     ParseCommandLine(cmdInfo);

 ASSERT(2 == cmdInfo.m_arCommd.GetSize());
 ASSERT(0 == cmdInfo.m_arCommd[0].Compare("Hello"));
 ASSERT(0 == cmdInfo.m_arCommd[1].Compare("World"));