目錄
附加（數(shù)據(jù)庫(kù)ADO類(lèi)型）：
文本
A literal is a string written in code with "quotes around it". A literal is not a wxString, and (in wxWidgets 2.8) will not be implicitly converted to one. This means that you can never pass in a raw literal into a wxWidget function or method (unless you don't care about your app not building with Unicode-enabled wxWidgets builds)
文本是一個(gè)在代碼中被引號(hào)包圍的串，文本它不是一個(gè)單純的wxString類(lèi)型，并且(在wxWidgets 2.8中)不能被隱含的轉(zhuǎn)換為一個(gè)wxString類(lèi)型。這意味著你不能試圖將光禿禿的將一段文本放到wxWidget函數(shù)或方法中通過(guò)編譯(除非你不在 意你的應(yīng)用程序是需要在Unicode編碼環(huán)境中通過(guò)編譯的)。
MessageBox("I'm a mistake!") // WRONG in WxWidgets 2.8 (OK in 2.9) Instead, wxWidgets (prior to wxWidgets 2.9) requires you to use one of these macros to turn literals into wxString-compatible characters:
_("text that can be translated") wxT("text that won't be translated") _T("same as wxT") char* c = "sometext"; wxT(c) // WRONG, not a literal Rather than being a nuisance, the _(), wxT(), and _T() macros take care of some unicode issues and help with internationalization.
char* to wxString
const char* chars = "Hello world"; // assuming your string is encoded as UTF-8, change the wxConv* parameter as needed wxString mystring(chars, wxConvUTF8);
wxString to char*
void my_function(const char* foo) { } ... wxString mystring(wxT("HelloWorld")); // you could give the encoding you want as a parameter to mb_str(), e.g. mb_str(wxConvUTF8) my_function( mystring.mb_str() ); mb_str() 返回一個(gè)臨時(shí)的指針，如果你需要通過(guò)函數(shù)得到更多的返回結(jié)果(就和上面的情況一樣)，你可以臨時(shí)保存一下這個(gè)字符數(shù)據(jù)流：
wxString s( wxT("some string") ); wxCharBuffer buffer=s.ToUTF8(); foo( buffer.data() ); // data() returns const char * bar( buffer.data(), strlen(buffer.data()) ); // in case you need the length of the data 當(dāng)你真的需要將它復(fù)制為char*類(lèi)型時(shí)：
wxString mystring(wxT("HelloWorld")); char cstring[1024]; // assuming you want UTF-8, change the wxConv* parameter as needed strncpy(cstring, (const char*)mystring.mb_str(wxConvUTF8), 1023); 你也可以用ToUTF8(), 因?yàn)槟愕玫降木幋a比用mb_str()函數(shù)從const char*轉(zhuǎn)換成char*更加清楚。
wxString mystring(wxT("HelloWorld")); (const_cast<char*>((const char*)mystring.mb_str())) 在可變參數(shù)的函數(shù) (如printf)中用mb_str()函數(shù)將無(wú)效，但按以下的方法是有效的：
做為選擇，使用Potential Unicode Pitfalls中推薦的方法：
printf("%s", (const char*)mystring.mb_str()) wchar_t* to wxString
const wchar_t* chars = L"Hello world"; wxString mystring(chars);
wxString to wchar_t*
請(qǐng)翻閱官方文檔的以下方法：
wxString to TCHAR
TCHAR tCharString[255]; wxString myString(_T("Hello World")); const wxChar* myStringChars = myString.c_str(); for (int i = 0; i < myString.Len(); i++) { tCharString[i] = myStringChars [i]; } tCharString[myString.Len()] = _T('\0'); int to wxString
或者
float to wxString
或者
wxString to integer number
wxString number(wxT("145")); long value; if(!number.ToLong(&value)) { /* error! */ } 或者
wxString str = _T("123"); int num; num = wxAtoi(str); wxString to floating-point number
wxString number(wxT("3.14159")); double value; if(!number.ToDouble(&value)){ /* error! */ } std::string to wxString
std::string stlstring = "Hello world"; // assuming your string is encoded as UTF-8, change the wxConv* parameter as needed wxString mystring(stlstring.c_str(), wxConvUTF8);
從wxWidgets 2.9開(kāi)始, 你可以用適當(dāng)?shù)臉?gòu)造函數(shù)：
std::string stlstring = "Hello world"; // assuming your string is encoded as the current locale encoding (wxConvLibc) wxString mystring(stlstring);
wxString to std::string
在wxWidgets 2.8 :
wxString mystring(wxT("HelloWorld")); std::string stlstring = std::string(mystring.mb_str()); 在wxWidgets 2.9, 你可以用這個(gè)方法
std::wstring to wxString
從wxWidgets 2.9開(kāi)始, 你可以用適當(dāng)?shù)臉?gòu)造函數(shù)：
std::sstring stlstring = L"Hello world"; // assuming your string is encoded as the current locale encoding (wxConvLibc) wxString mystring(stlstring);
wxString to std::wstring
在wxWidgets 2.9, 你可以用這個(gè)方法
wxString::ToStdWstring()
附：（數(shù)據(jù)庫(kù)類(lèi)型）
" src="/CuteSoft_Client/CuteEditor/Images/anchor.gif">wxString 轉(zhuǎn) _bstr_t
wxString str(wxT("Hello")); _bstr_t mystring=_bstr_t(str.wc_str()); " src="/CuteSoft_Client/CuteEditor/Images/anchor.gif">_bstr_ 轉(zhuǎn) wxString _bstr_t bstr="hello"; wxString mystring = wxString(static_cast<const wchar_t *>(bstr));
" src="/CuteSoft_Client/CuteEditor/Images/anchor.gif">_variant_t 轉(zhuǎn) wxString
_variant_t varstr=_variant_t("Hello"); wxString mystring=wxString(static_cast<const wchar_t *>(_bstr_t(varstr))); " src="/CuteSoft_Client/CuteEditor/Images/anchor.gif">wxString 轉(zhuǎn) _variant_t
wxString str(wxT("Hello")); _variant_t myvar=_variant_t(str.wc_str());
本文翻譯自wxWidgets官方：http://wiki.wxwidgets.org/Converting_everything_to_and_from_wxString