我想显示OpenFileDialog打开的文件名,但是它会将错误的文本发送到标题栏。我改变了项目的字符集,但没有帮助。这是我的代码:
OpenFileDialog .h:
class OpenFileDialog
{
public:
OpenFileDialog(){};
void CreateOpenFileDialog(HWND hWnd, LPCWSTR Title, LPCWSTR InitialDirectory, LPCWSTR Filter, int FilterIndex);
~OpenFileDialog(){};
LPCWSTR result=L"";
};
OpenFileDialog .cpp:
void OpenFileDialog::CreateOpenFileDialog(HWND hWnd, LPCWSTR Title, LPCWSTR InitialDirectory, LPCWSTR Filter, int FilterIndex)
{
OPENFILENAME ofn;
TCHAR szFile[MAX_PATH];
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.lpstrFile = szFile;
ofn.lpstrFile[0] = '\0';
ofn.hwndOwner = hWnd;
ofn.nMaxFile = sizeof(szFile);
ofn.lpstrFilter = Filter;
ofn.nFilterIndex = FilterIndex;
ofn.lpstrTitle = Title;
ofn.lpstrInitialDir = InitialDirectory;
ofn.lpstrFileTitle = NULL;
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
if (GetOpenFileName(&ofn))
{
result = ofn.lpstrFile;
}
else
{
result = L"Empty";
}
}
和WM_COMMAND中的Windows过程:
case WM_COMMAND:
{
if (LOWORD(wParam) == ID_FILE_OPEN)
{
OpenFileDialog ofd;
ofd.CreateOpenFileDialog(hwnd, L"Test", L"C:\\", L"All files(*.*)\0*.*\0TextFiles(*.txt)\0*.txt\0", 2);
SetWindowText(hwnd, ofd.result);
}
break;
}
非常感谢。
答案 0 :(得分:1)
在函数CreateOpenFileDialog()
中,用于存储文件名的缓冲区是本地数组szFile[MAX_PATH]
。您初始化lpstrFile = szFile
结构中的ofn
,确保GetOpenFileName()
将用户输入的结果放在正确的位置。
问题在于,只要从CreateOpenFileDialog()
返回,就会销毁其局部变量,包括包含文件名的缓冲区。因此,您使用result
设置的result = ofn.lpstrFile;
指针指向无效的内存位置。
您可以通过在result
构造函数中的OpenFileDialog
中直接分配缓冲区(或使其成为数组)并将此指针直接与ofn.lpstrFile = buffer;