unicode下怎么将char[]或char*转成string?

[q523053]

bool  GetSourceHtml(char* theUrl )
{

    HINTERNET IN hOpen=  InternetOpen(_T("MSDN"), INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
    DWORD dwSize;
    const char*   szHead = "Accept: */*\r\n\r\n";
    char szTemp[5000];
    HINTERNET  hConnect;
    if ( !(hConnect = InternetOpenUrl ( hOpen,(LPCWSTR) theUrl, (LPCWSTR )szHead,_tcslen(szHead),  INTERNET_FLAG_FROM_CACHE, 0)))
    {
        return false;
    }

    string str;
    do
    {
        if (!InternetReadFile (hConnect, szTemp, 5000,  &dwSize) )
        {

            return false;
        }

        if (!dwSize)
            return false;  // Condition of dwSize=0 indicate EOF. Stop.
        else
        {
            string temp;
            sprintf(temp,_T("%s"),szTemp);
            str+=temp;
        }

        // fwrite(szTemp, sizeof (char), dwSize , pFile);
    }
    while (TRUE);
    ::InternetCloseHandle(hConnect) ;
    ::InternetCloseHandle(hOpen) ;


    wchar_t*	pWChar = NULL;
    DWORD		nLen1;


    // 将网页UTF-8格式编码转换成Unicode
    nLen1	= MultiByteToWideChar(CP_UTF8,0,str,str.length(),pWChar,0);
    pWChar	= new wchar_t[nLen1 + 1];
    memset(pWChar,0,(nLen1 + 1 ) * sizeof(wchar_t));
    MultiByteToWideChar(CP_UTF8,0,str,str.length(),pWChar,nLen1);

    char*	pChar = NULL;
    DWORD	nLen2;

    nLen2 = WideCharToMultiByte(CP_ACP,0,pWChar,nLen1,pChar,0,NULL,NULL);
    pChar = new char[nLen2 + 1];
    memset(pChar,0, nLen2 + 1);
    WideCharToMultiByte(CP_ACP,0,pWChar,nLen1,pChar,nLen2,NULL,NULL);

    sprintf(str,_T("%s"),pChar);//	str.Format(_T("%s"),pChar);
    delete pChar;
    delete pWChar;

    const std::tr1::regex pattern("style=\"\" href=\".*?\"");


    std::string weekend =str;

    std::string strSql;
    const std::tr1::sregex_token_iterator end;
    for (std::tr1::sregex_token_iterator i(weekend.begin(),
                                           weekend.end(), pattern);
            i != end;
            ++i)
    {
        std::string strtemp=*i;
        //  replace_all_distinct(strtemp,"'","''");
        strSql+="insert into tbcsdn values(,'"+strtemp+"'getData());";

    }
    myado.Init();
    if(myado.ExecuteSQL(strSql.c_str()))
        MsgBox(_T("成功!"));
    else
        MsgBox(_T("失败!!!"));
    return true;
}

有如下错误:

1>d:\documents and settings\administrator\my documents\visual studio 2008\projects\qq\qq\qq.cpp(111) : warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
1>        d:\program files\microsoft visual studio 9.0\vc\include\string.h(157) : 参见“strncpy”的声明
1>d:\documents and settings\administrator\my documents\visual studio 2008\projects\qq\qq\qq.cpp(154) : error C2664: “wcslen”: 不能将参数 1 从“const char *”转换为“const wchar_t *”
1>        与指向的类型无关；转换要求 reinterpret_cast、C 样式转换或函数样式转换
1>d:\documents and settings\administrator\my documents\visual studio 2008\projects\qq\qq\qq.cpp(173) : error C2664: “sprintf”: 不能将参数 1 从“std::string”转换为“char *”
1>        没有可用于执行该转换的用户定义的转换运算符，或者无法调用该运算符
1>d:\documents and settings\administrator\my documents\visual studio 2008\projects\qq\qq\qq.cpp(188) : error C2664: “MultiByteToWideChar”: 不能将参数 3 从“std::string”转换为“LPCSTR”
1>        没有可用于执行该转换的用户定义的转换运算符，或者无法调用该运算符
1>d:\documents and settings\administrator\my documents\visual studio 2008\projects\qq\qq\qq.cpp(191) : error C2664: “MultiByteToWideChar”: 不能将参数 3 从“std::string”转换为“LPCSTR”
1>        没有可用于执行该转换的用户定义的转换运算符，或者无法调用该运算符
1>d:\documents and settings\administrator\my documents\visual studio 2008\projects\qq\qq\qq.cpp(201) : error C2664: “sprintf”: 不能将参数 1 从“std::string”转换为“char *”
1>        没有可用于执行该转换的用户定义的转换运算符，或者无法调用该运算符

程序是unicode编码的,问题:
怎么将char[]或char*转成string?上面的错误怎么改?

[q523053]

bool  GetSourceHtml(TCHAR* theUrl )
{

    HINTERNET IN hOpen=  InternetOpen(_T("MSDN"), INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
    DWORD dwSize;
    const TCHAR*   szHead = _T("Accept: */*\r\n\r\n");
    char szTemp[500];
    HINTERNET  hConnect;
    if ( !(hConnect = InternetOpenUrl ( hOpen,(LPCWSTR) theUrl, (LPCWSTR )szHead,_tcslen(szHead),  INTERNET_FLAG_RELOAD, 0)))
    {
        return false;
    }

    string str;
    do
    {
        if (!InternetReadFile (hConnect, szTemp, 500,  &dwSize) )
        {

            return false;
        }

        if (!dwSize)
            break;  // Condition of dwSize=0 indicate EOF. Stop.
        else
        {
            string temp=string(szTemp);
            //  sprintf(temp,_T("%s"),szTemp);
            str+=temp;
        }

        // fwrite(szTemp, sizeof (TCHAR), dwSize , pFile);
    }
    while (TRUE);
    ::InternetCloseHandle(hConnect) ;
    ::InternetCloseHandle(hOpen) ;


    wchar_t*	pWChar = NULL;
    DWORD		nLen1;


    // 将网页UTF-8格式编码转换成Unicode
    nLen1	= MultiByteToWideChar(CP_UTF8,0,str.c_str(),str.length(),pWChar,0);
    pWChar	= new wchar_t[nLen1 + 1];
    memset(pWChar,0,(nLen1 + 1 ) * sizeof(wchar_t));
    MultiByteToWideChar(CP_UTF8,0,str.c_str(),str.length(),pWChar,nLen1);

    char*	pChar = NULL;
    DWORD	nLen2;

    nLen2 = WideCharToMultiByte(CP_ACP,0,pWChar,nLen1,pChar,0,NULL,NULL);
    pChar = new char[nLen2 + 1];
    memset(pChar,0, nLen2 + 1);
    WideCharToMultiByte(CP_ACP,0,pWChar,nLen1,pChar,nLen2,NULL,NULL);

    str=string(pChar);
    //    sprintf(str,_T("%s"),pChar);//	str.Format(_T("%s"),pChar);
    delete pChar;
    delete pWChar;

    const std::tr1::regex pattern("style=\"\" href=\"(.*?)\"");


    std::string weekend =str;

    std::string strSql;
    const std::tr1::sregex_token_iterator end;
    for (std::tr1::sregex_token_iterator i(weekend.begin(),
                                           weekend.end(), pattern);
            i != end;
            ++i)
    {
        std::string strtemp=*i;
        //  replace_all_distinct(strtemp,"'","''");
        strSql+="insert into tbcsdn values('"+strtemp+"',getDate());";

    }
    myado.Init();
    if(myado.ExecuteSQL(strSql.c_str()))
        MsgBox(_T("成功!"));
    else
        MsgBox(_T("失败!!!"));
    return true;

[q523053]

[Quote=引用 7 楼 q523053 的回复:]
C/C++ code
bool GetSourceHtml(TCHAR* theUrl )
{

HINTERNET IN hOpen= InternetOpen(_T("MSDN"), INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
DWORD dwSize;
const TCHAR* szHead = _T("A……
[/Quote]有极小部分问号的乱码,怎么解决啊?

[赵4老师]

把乱码看成是一个一个BYTE，脑子里面清楚每个BYTE在转换前后的正确取值应该是几，问题就解决了。

[白云飘飘飘]

MultiByteToWideChar第一个参数CP_ACP

[ylke2007]

怎么将char[]或char*转成string?上面的错误怎么改?
char ch[] = "char";
string strch = string( ch );

char *pch = "pch";
string strpch = string( pch );

char *pstr = strpch.c_str();

[向立天]

不要用char
用TCHAR

[weilong8998]

我记得这种情况下,都是用TCHAR的

[xiuxianshen]

TCHAR

[huang0596]

是用TCHAR的