将文本复制到剪贴板 [英] Copying text to the clipboard

问题描述

如今，将文本复制到剪贴板时，将SetClipboardData用作CF_UNICODETEXT而不是CF_TEXT更好吗?粘贴实体会有所不同吗?

有任何论点吗?

Nowadays, when copying text to the clipboard, is it any better to SetClipboardData as CF_UNICODETEXT instead of CF_TEXT ? Will it make a difference for the pasting entity ?

Any argument ?

推荐答案

对不起，我只会一点英语.
我刚刚读了标题.

MSDN:
系统在某些剪贴板格式之间隐式转换数据:如果窗口以不在剪贴板上的格式请求数据，则系统将可用格式转换为请求的格式.系统可以如下表所示转换数据.

Sorry, I''m only know a little English.
I just read the title.

MSDN:
The system implicitly converts data between certain clipboard formats: if a window requests data in a format that is not on the clipboard, the system converts an available format to the requested format. The system can convert data as indicated in the following table.

Clipboard Format | Conversion Format | Platform Support 

CF_OEMTEXT       | CF_TEXT           | Windows NT/Windows 2000, Windows 95/Windows 98/Windows Me 
CF_OEMTEXT       | CF_UNICODETEXT    | Windows NT/Windows 2000 
CF_TEXT          | CF_OEMTEXT        | Windows NT/Windows 2000, Windows 95/Windows 98/Windows Me 
CF_TEXT          | CF_UNICODETEXT    | Windows NT/Windows 2000 
CF_UNICODETEXT   | CF_OEMTEXT        | Windows NT/Windows 2000 
CF_UNICODETEXT   | CF_TEXT           | Windows NT/Windows 2000 

让我在Windows XP上进行简单尝试:

Let me have a simple try on the windows xp:

SetClipboardData(/*an ansi string*/, CF_TEXT);
// then
IsClipboardFormatAvailable(CF_TEXT); // success
IsClipboardFormatAvailable(CF_UNICODETEXT); // success
GetClipboardData(CF_TEXT); // success and read right string
GetClipboardData(CF_UNICODETEXT); // success and read right string
// unicode string also can test passed

但是我在Windows 98上进行了测试，如果使用CF_TEXT设置SetClipboardData，则必须使用CF_TEXT设置GetClipboardData，如果使用CF_UNICODETEXT设置SetClipboardData，则必须使用CF_UNICODETEXT设置GetClipboardData.当我使用CF_UNICODETEXT SetClipboardData时，记事本(win98)无法从剪贴板粘贴文本.

因此，如果要支持Windows 98，则必须使用CF_TEXT设置SetClipboardData，否则可以使用其中任何一个.我建议您使用unicode.

but I test on the windows 98, if you SetClipboardData with CF_TEXT, then you must GetClipboardData with CF_TEXT, and if you SetClipboardData with CF_UNICODETEXT, you must GetClipboardData with CF_UNICODETEXT. when I SetClipboardData with CF_UNICODETEXT, the notepad(win98) can''t paste text from clipboard.

so, if you wanna support the windows 98, you must SetClipboardData with CF_TEXT, else you can use any one of them. I recommend you use unicode.

最好是因为可以使用Unicode.如果您的应用程序完全允许输入Unicode，则绝对不接受CF_TEXT，请使用CF_UNICODETEXT.

这将问题简化为:您是否要完全支持Unicode?这实际上取决于您的应用程序和要求.当应用程序仅支持ASCII(甚至不超过127的代码点的ANSI)时，它实际上可以是非Unicode的.诸如此类的某些应用程序确实具有某些权利.

不过，根据经验，我认为最好是假设非Unicode文本的时代已经过去了.

-SA

It is better just because you can use Unicode. If your application allows to enter Unicode at all, CF_TEXT is absolutely unacceptable, use CF_UNICODETEXT.

This reduces the problem to this one: do you want to support Unicode at all? It really depends on your application and requirements. An application can really be non-Unicode when it supports only ASCII (not even ANSI beyond the code point of 127). Some applications like that do have some right to exist.

As a rule of thumb, though, I think its the best to assume that the time of non-Unicode texts has gone.

—SA

if ( OpenClipboard(NULL) )
	{
		// 
		// EmptyClipboard sets the clipboard owner to NULL		        // 
		if ( !EmptyClipboard() ) goto OnError1;
		TCHAR chValue[] = _T("Hello Clipboard.");
		size_t nLength = _tcslen(chValue);
		size_t nByteOfBuffer = (nLength + 1) * sizeof(TCHAR);
		HGLOBAL hGlobal = NULL;
		hGlobal = GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT,  nByteOfBuffer);
		if (NULL == hGlobal) goto OnError1;
		LPTSTR pBuf = (LPTSTR)GlobalLock(hGlobal); 
		if (NULL == pBuf)
		{
			GlobalFree(hGlobal);
			hGlobal = NULL;
		}
		
		_tcscpy_s(pBuf, nLength + 1, chValue);
#ifdef _UNICODE
		SetClipboardData(CF_UNICODETEXT, hGlobal);
#else
		SetClipboardData(CF_TEXT, hGlobal);
#endif
		GlobalUnlock(hGlobal);
OnError1:
		CloseClipboard();
	}

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