wxWidgets使用ADO访问数据库时遇到的编译问题

2011/10/14 技术文章 0 Comment 13,250 Views

今天在做项目的时候，遇到一个非常郁闷的问题，捣鼓了半天，最后在国外的一个论坛上获得了思路，终于把它解决掉，在此给大家分享一下。

我们知道，在C++中用ADO操作数据库，首先需要用#import将ado组件导入进来，然后才能正常使用它。

#pragma once
#import &quot;C:\Program Files\Common Files\System\ado\msado15.dll&quot; rename(&quot;EOF&quot;, &quot;EndOfFile&quot;)
using namespace ADODB;

#pragma once

#import "C:\Program Files\Common Files\System\ado\msado15.dll" rename("EOF", "EndOfFile")

using namespace ADODB;

以下是我原来出错时的代码：

#pragma once
#import &quot;C:\Program Files\Common Files\System\ado\msado15.dll&quot; rename(&quot;EOF&quot;, &quot;EndOfFile&quot;)
using namespace ADODB;

#include &lt;wx/wx.h&gt;

////////////////////////////

class DB
{
public:
	static void Init();
	static bool Open(_ConnectionPtr&amp; pConnection,wxString server,wxString database,wxString uid,wxString pwd);
	static bool Execute(_ConnectionPtr&amp; pConnection,wxString sql);
	static bool Recordset(_ConnectionPtr&amp; pConnection,_RecordsetPtr&amp; pRecordset,wxString sql);
};

#pragma once

#import "C:\Program Files\Common Files\System\ado\msado15.dll" rename("EOF", "EndOfFile")

using namespace ADODB;

#include <wx/wx.h>

////////////////////////////

class DB

{

public:

static void Init();

static bool Open(_ConnectionPtr& pConnection,wxString server,wxString database,wxString uid,wxString pwd);

static bool Execute(_ConnectionPtr& pConnection,wxString sql);

static bool Recordset(_ConnectionPtr& pConnection,_RecordsetPtr& pRecordset,wxString sql);

};

这个时候的错误提示是这样的：

d:\wxwidgets\include\wx\msw\winundef.h(39) : error C2664: &#39;CreateDialogParamW&#39; : cannot convert parameter 2 from &#39;const char *&#39; to &#39;const unsigned short *&#39;
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
d:\wxwidgets\include\wx\msw\winundef.h(70) : error C2664: &#39;CreateFontW&#39; : cannot convert parameter 14 from &#39;const char *&#39; to &#39;const unsigned short *&#39;
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
d:\wxwidgets\include\wx\msw\winundef.h(96) : error C2664: &#39;CreateWindowExW&#39; : cannot convert parameter 2 from &#39;const char *&#39; to &#39;const unsigned short *&#39;
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
d:\wxwidgets\include\wx\msw\winundef.h(112) : error C2664: &#39;LoadMenuW&#39; : cannot convert parameter 2 from &#39;const char *&#39; to &#39;const unsigned short *&#39;
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
d:\wxwidgets\include\wx\msw\winundef.h(127) : error C2664: &#39;FindTextW&#39; : cannot convert parameter 1 from &#39;struct tagFINDREPLACEA *&#39; to &#39;struct tagFINDREPLACEW *&#39;
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
d:\wxwidgets\include\wx\msw\winundef.h(318) : error C2664: &#39;LoadIconW&#39; : cannot convert parameter 2 from &#39;const char *&#39; to &#39;const unsigned short *&#39;
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
d:\wxwidgets\include\wx\msw\winundef.h(331) : error C2664: &#39;LoadBitmapW&#39; : cannot convert parameter 2 from &#39;const char *&#39; to &#39;const unsigned short *&#39;
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

d:\wxwidgets\include\wx\msw\winundef.h(39) : error C2664: 'CreateDialogParamW' : cannot convert parameter 2 from 'const char *' to 'const unsigned short *'