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CString conversion problem

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  • U User 589870

    CString name; WCHAR disname[100]={0}; name= m_IniReader.getKeyValue(str,"VIEWNAME");; wcscpy(disname, A2W((LPCSTR)name)); like this?

    M Offline
    M Offline
    Mohan Ramachandra
    wrote on last edited by
    #4

    Try this :)

        WCHAR disname\[100\]={0};
    CStringW name;
        name= m\_IniReader.getKeyValue(str,"VIEWNAME");
    wcscpy(disname, (LPCWSTR)name.GetBuffer(100));
    MessageBoxW(NULL,disname,disname,MB\_OK);
    name.ReleaseBuffer(100);
    
    C 1 Reply Last reply
    0
    • M Mohan Ramachandra

      Try this :)

          WCHAR disname\[100\]={0};
      CStringW name;
          name= m\_IniReader.getKeyValue(str,"VIEWNAME");
      wcscpy(disname, (LPCWSTR)name.GetBuffer(100));
      MessageBoxW(NULL,disname,disname,MB\_OK);
      name.ReleaseBuffer(100);
      
      C Offline
      C Offline
      Cedric Moonen
      wrote on last edited by
      #5

      Mohan Ramachandra wrote:

      wcscpy(disname, (LPCWSTR)name.GetBuffer(100));

      No, calling GetBuffer is really a very bad practice. You shouldn't do that, the CString class already provides cast operators so there's no need to call GetBuffer ! And the the case is probably no needed neither, but that depends how the project was compiled (UNICODE or not).

      Cédric Moonen Software developer
      Charting control [v3.0] OpenGL game tutorial in C++

      R M 2 Replies Last reply
      0
      • U User 589870

        CString name; WCHAR disname[100]={0}; name= m_IniReader.getKeyValue(str,"VIEWNAME");; wcscpy(disname, A2W((LPCSTR)name)); like this?

        C Offline
        C Offline
        Cedric Moonen
        wrote on last edited by
        #6

        I suggest you read this excellent article[^]. You'll understand much more about string manipulation afterward.

        Cédric Moonen Software developer
        Charting control [v3.0] OpenGL game tutorial in C++

        1 Reply Last reply
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        • C Cedric Moonen

          Mohan Ramachandra wrote:

          wcscpy(disname, (LPCWSTR)name.GetBuffer(100));

          No, calling GetBuffer is really a very bad practice. You shouldn't do that, the CString class already provides cast operators so there's no need to call GetBuffer ! And the the case is probably no needed neither, but that depends how the project was compiled (UNICODE or not).

          Cédric Moonen Software developer
          Charting control [v3.0] OpenGL game tutorial in C++

          R Offline
          R Offline
          rajajay82
          wrote on last edited by
          #7

          i heard a lot of time calling GetBuffer a bad practice, why do so?

          Ajayraj

          C C 2 Replies Last reply
          0
          • U User 589870

            CString name; WCHAR disname[100]={0}; name= m_IniReader.getKeyValue(str,"VIEWNAME");; wcscpy(disname, A2W((LPCSTR)name)); like this?

            A Offline
            A Offline
            Adam Roderick J
            wrote on last edited by
            #8

            Did u check the whether you are getting the japanese text in CString? And i hope its a UNICODE build.

            Величие не Бога может быть недооценена.

            U 1 Reply Last reply
            0
            • R rajajay82

              i heard a lot of time calling GetBuffer a bad practice, why do so?

              Ajayraj

              C Offline
              C Offline
              CPallini
              wrote on last edited by
              #9

              GetBuffer (as the name suggests) exposes the internal buffer of the CString object. Moreover you must remember to call ReleaseBuffer when you've done with it. Most of the times, you really don't need to call it. :)

              If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
              This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
              [My articles]

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              • R rajajay82

                i heard a lot of time calling GetBuffer a bad practice, why do so?

                Ajayraj

                C Offline
                C Offline
                Cedric Moonen
                wrote on last edited by
                #10

                Because if you read the documentation of the function, you will see that you get a pointer to the internal buffer of the string and that you HAVE to call ReleaseBuffer afterward (which will be often forgotten). Furthermore, why would you use GetBuffer, while the CString provides a cast operator which returns you the same thing ? Calling GetBuffer can lead to mistakes if you forget to call ReleaseBuffer.

                Cédric Moonen Software developer
                Charting control [v3.0] OpenGL game tutorial in C++

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                • A Adam Roderick J

                  Did u check the whether you are getting the japanese text in CString? And i hope its a UNICODE build.

                  Величие не Бога может быть недооценена.

                  U Offline
                  U Offline
                  User 589870
                  wrote on last edited by
                  #11

                  yes i m getting japanese text in CString.

                  A 1 Reply Last reply
                  0
                  • C Cedric Moonen

                    Mohan Ramachandra wrote:

                    wcscpy(disname, (LPCWSTR)name.GetBuffer(100));

                    No, calling GetBuffer is really a very bad practice. You shouldn't do that, the CString class already provides cast operators so there's no need to call GetBuffer ! And the the case is probably no needed neither, but that depends how the project was compiled (UNICODE or not).

                    Cédric Moonen Software developer
                    Charting control [v3.0] OpenGL game tutorial in C++

                    M Offline
                    M Offline
                    Mohan Ramachandra
                    wrote on last edited by
                    #12

                    Cedric Moonen wrote:

                    No, calling GetBuffer is really a very bad practice. You shouldn't do that, the CString class already provides cast operators so there's no need to call GetBuffer !

                    Thanks, I didn't know that

                    1 Reply Last reply
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                    • U User 589870

                      yes i m getting japanese text in CString.

                      A Offline
                      A Offline
                      Adam Roderick J
                      wrote on last edited by
                      #13

                      Please check whether _UNICODE preprocessor is added in your project setting.

                      Величие не Бога может быть недооценена.

                      1 Reply Last reply
                      0
                      • U User 589870

                        CString name; WCHAR disname[100]={0}; name= m_IniReader.getKeyValue(str,"VIEWNAME");; wcscpy(disname, A2W((LPCSTR)name)); like this?

                        R Offline
                        R Offline
                        Raj Jaiswal
                        wrote on last edited by
                        #14

                        CString name; WCHAR disname[100]={0}; name= m_IniReader.getKeyValue(str,"VIEWNAME");; wcscpy(disname, A2W((LPCWSTR)name)); Use this code. And make sure that your project build support UNICODE.

                        Raj Jaiswal

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