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分数白送，超简单问题，线程参数
typedef struct
{
CDC* dc;
}PrintStruct, *lpPrintStruct;
//线程
uint thread_print()
{
lpPrintStruct pStruct = (lpPrintStruct)lParam;
CDC* dc = pStruct->dc;
dc->StartPage();
dc->TextOut(); //出错
dc->EnaPage();
return 0;
}
void CTest::Print()
{
dc.TextOut(); //没错
lpPrintStruct pStruct = new PrintStruct;
pStruct->pdc = &dc;
AfxBeginThread(thread_print, (LPVOID)pStruct, NULL);
}
cdc在普通函数里用是没错的 可是放到线程里就出错了，各位大哥教教我该怎么传cdc这个参啊
{
CDC* dc;
}PrintStruct, *lpPrintStruct;
//线程
uint thread_print()
{
lpPrintStruct pStruct = (lpPrintStruct)lParam;
CDC* dc = pStruct->dc;
dc->StartPage();
dc->TextOut(); //出错
dc->EnaPage();
return 0;
}
void CTest::Print()
{
dc.TextOut(); //没错
lpPrintStruct pStruct = new PrintStruct;
pStruct->pdc = &dc;
AfxBeginThread(thread_print, (LPVOID)pStruct, NULL);
}
cdc在普通函数里用是没错的 可是放到线程里就出错了，各位大哥教教我该怎么传cdc这个参啊
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bellusvita 2010-08-06
哈哈 万分感谢fangongdalu7148
wangzf0916 2010-08-06
CDC* dc = pStruct->dc;
bellusvita 2010-08-06
是啊 楼上的 我也这个错 有办法么
zgsdzhaolanxiang1 2010-08-06
把 CDC 设置成静态的 要不你线程执行的时候CDC 对象都释放了，，当然运行出错了
bellusvita 2010-08-06
不是print是自写的 对话框程序
void CTest::Print()
{
cdc dc;
dc.TextOut(); //没错
lpPrintStruct pStruct = new PrintStruct;
pStruct->pdc = &dc;
AfxBeginThread(thread_print, (LPVOID)pStruct, NULL);
}
void CTest::Print()
{
cdc dc;
dc.TextOut(); //没错
lpPrintStruct pStruct = new PrintStruct;
pStruct->pdc = &dc;
AfxBeginThread(thread_print, (LPVOID)pStruct, NULL);
}
zgsdzhaolanxiang1 2010-08-06
typedef struct
{
CDC* dc;
}PrintStruct, *lpPrintStruct;
UINT thread_print(LPVOID pParam)
{
lpPrintStruct pStruct = (lpPrintStruct)pParam;
CDC* dc = pStruct->dc;
dc->TextOut(0,100,"dasasd56"); //出错
return 0;
}
void CReDlg::OnButton1()
{
// TODO: Add your control notification handler code here
static CClientDC dc(this);
dc.TextOut(0,80,"DASF454545"); //没错
lpPrintStruct pStruct = new PrintStruct;
pStruct->dc = &dc;
AfxBeginThread(thread_print, (LPVOID)pStruct, NULL);
}
{
CDC* dc;
}PrintStruct, *lpPrintStruct;
UINT thread_print(LPVOID pParam)
{
lpPrintStruct pStruct = (lpPrintStruct)pParam;
CDC* dc = pStruct->dc;
dc->TextOut(0,100,"dasasd56"); //出错
return 0;
}
void CReDlg::OnButton1()
{
// TODO: Add your control notification handler code here
static CClientDC dc(this);
dc.TextOut(0,80,"DASF454545"); //没错
lpPrintStruct pStruct = new PrintStruct;
pStruct->dc = &dc;
AfxBeginThread(thread_print, (LPVOID)pStruct, NULL);
}
lisunlin0 2010-08-06
应该是void CTest::Print(CDC &dc)吧？
不要保存此dc,而应该使用窗口的hdc。
不要保存此dc,而应该使用窗口的hdc。