C++ C++;获取OpenFileName时出现WinAPI错误
你好。我制作了一个用于OpenFileDialog的类:C++ C++;获取OpenFileName时出现WinAPI错误,c++,winapi,visual-studio-2012,C++,Winapi,Visual Studio 2012,你好。我制作了一个用于OpenFileDialog的类: #include <Windows.h> enum DialogResult { OK, Cancel }; class IFileDialog { public: TCHAR FileName[MAX_PATH]; LPTSTR Title; virtual DialogResult Show() = 0; }; class COpenFileDialog : public IFileDia
#include <Windows.h>
enum DialogResult { OK, Cancel };
class IFileDialog
{
public:
TCHAR FileName[MAX_PATH];
LPTSTR Title;
virtual DialogResult Show() = 0;
};
class COpenFileDialog : public IFileDialog
{
public:
LPTSTR Filter;
LPTSTR DefExt;
COpenFileDialog(HWND hWnd);
DialogResult Show();
private:
OPENFILENAME m_ofn;
};
COpenFileDialog::COpenFileDialog(HWND hWnd)
{
//FileName[0] = '\0';
ZeroMemory(&m_ofn, sizeof(m_ofn));
m_ofn.lStructSize = sizeof(m_ofn);
m_ofn.hwndOwner = hWnd;
m_ofn.lpstrFilter = Filter;
m_ofn.nMaxFile = MAX_PATH;
m_ofn.lpstrFile = FileName;
m_ofn.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY;
m_ofn.lpstrDefExt = DefExt;
}
DialogResult COpenFileDialog::Show()
{
return GetOpenFileName(&m_ofn) ? DialogResult::OK : DialogResult::Cancel;
}
但该程序只支持hDialog.Show(),而不是调用ScoEditor.exe中0x000007FDFC5D21A3(SHCore.dll)处的GetOpenFileName(&m_of n):未处理异常:0xC000005:访问冲突读取位置0x000000e6000000
如何修复它?您的构造函数执行
m_of n.lpstrFilter=Filter代码>,但过滤器
尚未初始化。稍后,您的代码将修改过滤器
,但无法更新n.lpstrFilter的m_中的值
。因此,您正在将未初始化的lpstrFilter
传递给GetOpenFileName
如果通过在调用
GetOpenFileName
时设置断点并查看要传递的m_of n
的内容来调试代码,您就会发现这一点。这不是问题所在,但请注意,您正在将字符串文本分配给非常量char
指针。最好将Filter
、deext
和Title
的类型更改为LPCTSTR
,以避免意外写入它们。
COpenFileDialog hDialog = COpenFileDialog(hMainWindow);
hDialog.Filter = "M&B Scenes\0*.sco\0";
hDialog.DefExt = "sco";
hDialog.Title = "";
if(hDialog.Show() == DialogResult::OK)
{
//TODO
}