blocks|key|3755930|text|感谢您提供指向MSDN文章的链接。这正是我要找的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3755931|std::wstring+s2ws(const+std::string&+s)
{
++++int+len;
++++int+slength+=+(int)s.length()+%2B+1;
++++len+=+MultiByteToWideChar(CP_ACP,+0,+s.c_str(),+slength,+0,+0);+
++++wchar_t*+buf+=+new+wchar_t[len];
++++MultiByteToWideChar(CP_ACP,+0,+s.c_str(),+slength,+buf,+len);
++++std::wstring+r(buf);
++++delete[]+buf;
++++return+r;
}

std::wstring+stemp+=+s2ws(myString);
LPCWSTR+result+=+stemp.c_str();|code-block|syntax|javascript|3755932|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Thanks for the link to the MSDN article. This is exactly what I was looking for.

<pre><code>std::wstring s2ws(const std::string&amp; s)
{
 int len;
 int slength = (int)s.length() + 1;
 len = MultiByteToWideChar(CP_ACP, 0, s.c_str(), slength, 0, 0); 
 wchar_t* buf = new wchar_t[len];
 MultiByteToWideChar(CP_ACP, 0, s.c_str(), slength, buf, len);
 std::wstring r(buf);
 delete[] buf;
 return r;
}

std::wstring stemp = s2ws(myString);
LPCWSTR result = stemp.c_str();
</code></pre>

blocks|key|5166848|text|实际上，这个解决方案比其他任何建议都简单得多：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5166849|std::wstring+stemp+=+std::wstring(s.begin(),+s.end());
LPCWSTR+sw+=+stemp.c_str();|code-block|syntax|javascript|5166850|最棒的是，它是独立于平台的。|5166851|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

The solution is actually a lot easier than any of the other suggestions:
<pre><code>std::wstring stemp = std::wstring(s.begin(), s.end());
LPCWSTR sw = stemp.c_str();
</code></pre>
Best of all, it's platform independent.

blocks|key|2911522|text|如果是在ATL/MFC环境中，则可以使用ATL转换宏：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2911523|#include+<atlbase.h>
#include+<atlconv.h>

.+.+.

string+myStr("My+string");
CA2W+unicodeStr(myStr);|code-block|syntax|javascript|2911524|然后，您可以将unicodeStr用作LPCWSTR。unicode字符串的内存在堆栈上创建并释放，然后执行unicodeStr的析构函数。|2911525|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If you are in an ATL/MFC environment, You can use the ATL conversion macro:

<pre><code>#include &lt;atlbase.h&gt;
#include &lt;atlconv.h&gt;

. . .

string myStr("My string");
CA2W unicodeStr(myStr);
</code></pre>

You can then use unicodeStr as an LPCWSTR. The memory for the unicode string is created on the stack and released then the destructor for unicodeStr executes.

blocks|key|2911712|text|我更喜欢使用标准转换器：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2911713|#include+<codecvt>

std::string+s+=+"Hi";
std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>>+converter;
std::wstring+wide+=+converter.from_bytes(s);
LPCWSTR+result+=+wide.c_str();|code-block|syntax|javascript|2911714|请在此答案中找到更多详细信息：https://stackoverflow.com/a/18597384/592651|offset|length|2911715|2911716|2020年12月21日更新：@Andreas+H评论了我的答案。我认为他的评论很有价值，所以我相应地更新了我的答案：|2911717|2911718|blockquote|2911719|2911720|2911721|codecvt_utf8_utf16在C%2B%2B17中已被弃用。|ordered-list-item|style|CODE|2911722|该代码还暗示源代码编码为UTF-8，但通常并非如此。|2911723|在C%2B%2B20中，由于此原因，UTF-8有一个单独的类型std：：u8字符串。|2911724|2911725|但它对我来说是有效的，因为我仍然在使用旧版本的C%2B%2B，而且我的源码恰好是UTF-8。|2911726|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/18597384/592651^0|0|0|F|17|0|0|0|0|0|0|0|0|0|I|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1D|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1E|8|@]|9|@$I|1F|J|1G|1|1H]]|A|$]]|$1|K|3|-4|5|6|7|1I|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1J|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|1K|8|@]|9|@]|A|$]]|$1|O|3|-4|5|P|7|1L|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|1N|8|@]|9|@]|A|$]]|$1|S|3|T|5|U|7|1O|8|@$I|1P|J|1Q|V|W]]|9|@]|A|$]]|$1|X|3|Y|5|U|7|1R|8|@]|9|@]|A|$]]|$1|Z|3|10|5|U|7|1S|8|@]|9|@]|A|$]]|$1|11|3|-4|5|6|7|1T|8|@]|9|@]|A|$]]|$1|12|3|13|5|6|7|1U|8|@]|9|@]|A|$]]|$1|14|3|-4|5|6|7|1V|8|@]|9|@]|A|$]]]|15|$16|$5|17|18|19|A|$1A|1B]]]]

I prefer using standard converters:
<pre><code>#include &lt;codecvt&gt;

std::string s = &quot;Hi&quot;;
std::wstring_convert&lt;std::codecvt_utf8_utf16&lt;wchar_t&gt;&gt; converter;
std::wstring wide = converter.from_bytes(s);
LPCWSTR result = wide.c_str();
</code></pre>
Please find more details in this answer: <a href="https://stackoverflow.com/a/18597384/592651">https://stackoverflow.com/a/18597384/592651</a>
<hr />
Update 12/21/2020 : My answer was commented on by @Andreas H . I thought his comment is valuable, so I updated my answer accordingly:
<blockquote>
<ol>
<li><code>codecvt_utf8_utf16</code> is deprecated in C++17.</li>
<li>Also the code implies that source encoding is UTF-8 which it usually isn't.</li>
<li>In C++20 there is a separate type std::u8string for UTF-8 because of that.</li>
</ol>
</blockquote>
But it worked for me because I am still using an old version of C++ and it happened that my source encoding was UTF-8 .

blocks|key|2911748|text|与Toran+Billups's+answer相同，只是我们应该知道：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2911749|C%2B%2B标准有.c_str()方法的规则，它允许我们使用const_cast+(而不是不必要的分配和删除)。|style|CODE|2911750|std::wstring+s2ws(const+std::string+&s)
{
++++int+len;
++++int+slength+=+(int)s.length()+%2B+1;
++++len+=+MultiByteToWideChar(CP_ACP,+0,+s.c_str(),+slength,+0,+0);
++++std::wstring+buf;
++++buf.resize(len);
++++MultiByteToWideChar(CP_ACP,+0,+s.c_str(),+slength,
+++++++++++const_cast<wchar_t+*>(buf.c_str()),+len);
++++return+buf;
}

std::wstring+wrapper+=+s2ws("My+UTF8+string!");
LPCWSTR+result+=+wrapper.c_str();|code-block|syntax|javascript|2911751|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/27296/8740349^0|1|M|0|0|6|8|R|A|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@$A|Z|B|10|F|G]|$A|11|B|12|F|G]]|9|@]|C|$]]|$1|H|3|I|5|J|7|13|8|@]|9|@]|C|$K|L]]|$1|M|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

Same as <a href="https://stackoverflow.com/a/27296/8740349">Toran Billups's answer</a>,
except that we should know:
The C++-standard has rules for <code>.c_str()</code> method,
which allows us to use <code>const_cast</code> (instead of the unnecessary allocation and deletion).
<pre class="lang-cpp prettyprint-override"><code>std::wstring s2ws(const std::string &amp;s)
{
 int len;
 int slength = (int)s.length() + 1;
 len = MultiByteToWideChar(CP_ACP, 0, s.c_str(), slength, 0, 0);
 std::wstring buf;
 buf.resize(len);
 MultiByteToWideChar(CP_ACP, 0, s.c_str(), slength,
 const_cast&lt;wchar_t *&gt;(buf.c_str()), len);
 return buf;
}

std::wstring wrapper = s2ws(&quot;My UTF8 string!&quot;);
LPCWSTR result = wrapper.c_str();
</code></pre>

blocks|key|3756199|text|如果您使用的是QT，那么您可以将其转换为QString，然后myqstring.toStdWString()将完成此任务。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3756200|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you are using QT then you can convert to QString and then myqstring.toStdWString() will do the trick.

blocks|key|2911804|text|它非常简单，不需要应用任何自定义方法。试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2911805|string+s+=+"So+Easy+Bro"
LPCWSTR+wide_string;

wide_string+=+CA2T(s.c_str());|code-block|syntax|javascript|2911806|我想，它会起作用的。|2911807|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

It's so easy, no need to apply any custom method. Try with this:
<pre><code>string s = &quot;So Easy Bro&quot;
LPCWSTR wide_string;

wide_string = CA2T(s.c_str());
</code></pre>
I think, it will works.

blocks|key|3755973|text|string++myMessage="helloworld";
int+len;
int+slength+=+(int)myMessage.length()+%2B+1;
len+=+MultiByteToWideChar(CP_ACP,+0,+myMessage.c_str(),+slength,+0,+0);+
wchar_t*+buf+=+new+wchar_t[len];
MultiByteToWideChar(CP_ACP,+0,+myMessage.c_str(),+slength,+buf,+len);
std::wstring+r(buf);
+std::wstring+stemp+=+r.C_str();
LPCWSTR+result+=+stemp.c_str();|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3755974|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>string myMessage="helloworld";
int len;
int slength = (int)myMessage.length() + 1;
len = MultiByteToWideChar(CP_ACP, 0, myMessage.c_str(), slength, 0, 0); 
wchar_t* buf = new wchar_t[len];
MultiByteToWideChar(CP_ACP, 0, myMessage.c_str(), slength, buf, len);
std::wstring r(buf);
 std::wstring stemp = r.C_str();
LPCWSTR result = stemp.c_str();
</code></pre>

blocks|key|5166914|text|LPCWSTR+lpcwName=std::wstring(strname.begin()，strname.end()).c_str()|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5166915|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

LPCWSTR lpcwName=std::wstring(strname.begin(), strname.end()).c_str()

blocks|key|713250|text|您可以使用std::wstring而不是std::string。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|713251|编辑:抱歉，这里没有更多的解释，但我必须要走了。|713252|使用std::wstring::c_str()|713253|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Instead of using a std::string, you could use a std::wstring.

EDIT: Sorry this is not more explanatory, but I have to run.

Use std::wstring::c_str()

I'm looking for a method, or a code snippet for converting std::string to LPCWSTR

How to convert std::string to LPCWSTR in C++ (Unicode)

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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