我的程序编译运行好像没有问题,但在DEBUG时,
如果运行长点时间就会报错,具体内容如下,望高手帮忙.
==================================================
头文件中定义:
private:
CBitmap m_Background;
==================================================
在OnInitDialog中有如下:
......
m_Background.LoadBitmap(IDB_MAINBK);
......
==================================================
OnPaint代码段如下:
......
CPaintDC dc(this);
CDC dcMem;
dcMem.CreateCompatibleDC(&dc);
BITMAP bitMap;
m_Background.GetBitmap(&bitMap);
CBitmap *pbmpOld=dcMem.SelectObject(&m_Background);
dc.StretchBlt0,0,bitMap.bmWidth,bitMap.bmHeight,&dcMem,0,0,bitMap.bmWidth,bitMap.bmHeight,SRCCOPY); if(pbmpOld)
dcMem.SelectObject(pbmpOld);dcMem.DeleteDC();
......===================================================
出错会停在一个叫dbgrpt.c的文件中,
代码段如下:#undef _CrtDbgBreak_CRTIMP void _cdecl _CrtDbgBreak(
void
)
{
DebugBreak();
}
再继续运行会停在Onpaint中的如下代码处:
CBitmap *pbmpOld=dcMem.SelectObject(&m_Background); 谢谢,这个问题困扰我很久了,郁闷.
如果运行长点时间就会报错,具体内容如下,望高手帮忙.
==================================================
头文件中定义:
private:
CBitmap m_Background;
==================================================
在OnInitDialog中有如下:
......
m_Background.LoadBitmap(IDB_MAINBK);
......
==================================================
OnPaint代码段如下:
......
CPaintDC dc(this);
CDC dcMem;
dcMem.CreateCompatibleDC(&dc);
BITMAP bitMap;
m_Background.GetBitmap(&bitMap);
CBitmap *pbmpOld=dcMem.SelectObject(&m_Background);
dc.StretchBlt0,0,bitMap.bmWidth,bitMap.bmHeight,&dcMem,0,0,bitMap.bmWidth,bitMap.bmHeight,SRCCOPY); if(pbmpOld)
dcMem.SelectObject(pbmpOld);dcMem.DeleteDC();
......===================================================
出错会停在一个叫dbgrpt.c的文件中,
代码段如下:#undef _CrtDbgBreak_CRTIMP void _cdecl _CrtDbgBreak(
void
)
{
DebugBreak();
}
再继续运行会停在Onpaint中的如下代码处:
CBitmap *pbmpOld=dcMem.SelectObject(&m_Background); 谢谢,这个问题困扰我很久了,郁闷.
{
if (IsIconic())
{
CPaintDC dc(this); // 用于绘制的设备上下文 SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0); // 使图标在工作矩形中居中
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2; // 绘制图标
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CPaintDC dc(this);
CDC dcMem;
dcMem.CreateCompatibleDC(&dc); CBitmap *pbmpOld=dcMem.SelectObject(&m_Background);
dc.StretchBlt(0,0,1024,768,&dcMem,0,0,1024,768,SRCCOPY); if(pbmpOld)
dcMem.SelectObject(pbmpOld); dcMem.DeleteDC();
m_sCurTime.SetBkColor(RGB(185,194,201));
m_sCurTime.SetForeColor(RGB(255,255,255));
m_sVersion.SetBkColor(RGB(185,194,201));
m_sVersion.SetForeColor(RGB(255,255,255));
}
}m_sCurTime,m_sVersion是两个重写过的Static类实例
不过你可以把
CDC dcMem;
dcMem.CreateCompatibleDC(&dc);
CBitmap *pbmpOld=dcMem.SelectObject(&m_Background);
dc.StretchBlt(0,0,1024,768,&dcMem,0,0,1024,768,SRCCOPY);
if(pbmpOld)
dcMem.SelectObject(pbmpOld);
dcMem.DeleteDC();
放到OnEraseBkgnd()中去,把
m_sCurTime.SetBkColor(RGB(185,194,201));
m_sCurTime.SetForeColor(RGB(255,255,255));
m_sVersion.SetBkColor(RGB(185,194,201));
m_sVersion.SetForeColor(RGB(255,255,255));
放到OnInitDialog()中去。
dcMem.CreateCompatibleDC(&dc);
放到OnCreate()中比较好
m_Background.GetBitmap(&bitMap);
-----
HBITMAP bitMap;
bitMap = (HBITMAP)operator HBITMAP();
m_Background.GetBitmap(&bitMap); 你的bitMap没初始化吧
试着在每一行后面加一句:TRACE("%d\n", __LINE__);这样每执行一行就会打印该行行号,然后在出错时,看看输入窗口里最后打印出来的是第几行。还有,出错时,系统说的是异常吗?还是非法内存访问?以及信息?
CBitmap m_Background;
CDC *dc;OnInitDialog加上
dc=GetDC();
m_Background.LoadBitmap(IDB_MAINBK);其余
.........
//CPaintDC dc(this);//注释掉这局
CDC dcMem;
dcMem.CreateCompatibleDC(dc); CBitmap *pbmpOld=dcMem.SelectObject(&m_Background);
BITMAP bitMap;m_Background.GetObject(sizeof(BITMAP),&bitMap);
dc->BitBlt(0,0,1024,768,&dcMem,0,0,1024,768,SRCCOPY);//不理解,为什么不设边角?dcMem.SelectObject(pbmpOld);
dcMem.DeleteDC();
m_Background.DeleteObject();//CBITMAP对象可以用这个方法,而BITMAP结构不能.