问题描述
如何使用 GetClipboardData(CF_TEXT);
而不用在C ++中调用和使用进程ID?
属于
How to use GetClipboardData(CF_TEXT);
without calling and use process id of this in C++?
and which libary does GetClipboardData(CF_TEXT)
belong to?
推荐答案
是Win32 API函数。
GetClipboardData()
is a Win32 API function.
GetClipboardData c $ c>必须首先用
GlobalLock()
锁定,然后您可以检索ANSI的 char *
指针剪贴板中的文本(请注意,如果要检索Unicode文本,则应使用)。
The handle returned by GetClipboardData()
must be first locked with GlobalLock()
, then you can retrieve the char*
pointer of the ANSI text in the clipboard (note that if you want to retrieve Unicode text, you should use the CF_UNICODETEXT
format).
剪贴板中的文本并将其存储在方便的 std :: string
类实例中(为了简单起见,错误管理被省略):
A sample code to retrieve the text from the clipboard and store it in a convenient std::string
class instance follows (error management omitted for simplicity):
std::string GetClipboardText()
{
// Try opening the clipboard
if (! OpenClipboard(nullptr))
... // error
// Get handle of clipboard object for ANSI text
HANDLE hData = GetClipboardData(CF_TEXT);
if (hData == nullptr)
... // error
// Lock the handle to get the actual text pointer
char * pszText = static_cast<char*>( GlobalLock(hData) );
if (pszText == nullptr)
... // error
// Save text in a string class instance
std::string text( pszText );
// Release the lock
GlobalUnlock( hData );
// Release the clipboard
CloseClipboard();
return text;
}
您可以使用C ++ RAII模式并使用异常:
You can use C++ RAII pattern and manage error conditions using exceptions, something like this:
#include <exception>
#include <iostream>
#include <ostream>
#include <stdexcept>
#include <string>
#include <windows.h>
using namespace std;
class RaiiClipboard
{
public:
RaiiClipboard()
{
if (! OpenClipboard(nullptr))
throw runtime_error("Can't open clipboard.");
// ... or define some custom exception class for clipboard errors.
}
~RaiiClipboard()
{
CloseClipboard();
}
// Ban copy
private:
RaiiClipboard(const RaiiClipboard&);
RaiiClipboard& operator=(const RaiiClipboard&);
};
class RaiiTextGlobalLock
{
public:
explicit RaiiTextGlobalLock(HANDLE hData)
: m_hData(hData)
{
m_psz = static_cast<const char*>(GlobalLock(m_hData));
if (! m_psz)
throw runtime_error("Can't acquire lock on clipboard text.");
}
~RaiiTextGlobalLock()
{
GlobalUnlock(m_hData);
}
const char* Get() const
{
return m_psz;
}
private:
HANDLE m_hData;
const char* m_psz;
// Ban copy
RaiiTextGlobalLock(const RaiiTextGlobalLock&);
RaiiTextGlobalLock& operator=(const RaiiTextGlobalLock&);
};
string GetClipboardText()
{
RaiiClipboard clipboard;
HANDLE hData = GetClipboardData(CF_TEXT);
if (hData == nullptr)
throw runtime_error("Can't get clipboard text.");
RaiiTextGlobalLock textGlobalLock(hData);
string text( textGlobalLock.Get() );
return text;
}
int main()
{
static const int kExitOk = 0;
static const int kExitError = 1;
try
{
cout << GetClipboardText() << endl;
return kExitOk;
}
catch(const exception& e)
{
cerr << "*** ERROR: " << e.what() << endl;
return kExitError;
}
}
这篇关于GetClipboardData(CF_TEXT)的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!