GetOpenFileName函数怎么不成功？

[实达诚实]

OPENFILENAME ofn;
GetOpenFileName(&ofn);

在使用GetOpenFileName函数总是不成功。

为什么呀？

[zhihuizhilv]

肯定是参数设置不对喽。
在仔细看看ofn参数的设置。

[顽固已死_有事烧纸]

To get extended error information, call GetLastError.

[顽固已死_有事烧纸]

MSDN的sample：

OPENFILENAME ofn;       // common dialog box structure
char szFile[260];       // buffer for file name
HWND hwnd;              // owner window
HANDLE hf;              // file handle

// Initialize OPENFILENAME
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = hwnd;
ofn.lpstrFile = szFile;
//
// Set lpstrFile[0] to '\0' so that GetOpenFileName does not 
// use the contents of szFile to initialize itself.
//
ofn.lpstrFile[0] = '\0';
ofn.nMaxFile = sizeof(szFile);
ofn.lpstrFilter = "All\0*.*\0Text\0*.TXT\0";
ofn.nFilterIndex = 1;
ofn.lpstrFileTitle = NULL;
ofn.nMaxFileTitle = 0;
ofn.lpstrInitialDir = NULL;
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;

// Display the Open dialog box. 

if (GetOpenFileName(&ofn)==TRUE) 
    hf = CreateFile(ofn.lpstrFile, GENERIC_READ,
        0, (LPSECURITY_ATTRIBUTES) NULL,
        OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
        (HANDLE) NULL);

[The_facE]

楼主你的参数ofn不能完全是空的，GetOpenFileName的参数是[in/out]，不是单纯的[out]

[实达诚实]

这个是我的参数的设置

static TCHAR szFilter[] =     TEXT ("BMP Files (*.BMP)\0*.bmp\0")  \
		TEXT ("JPEG Files (*.JPG)\0*.jpg\0") \
		TEXT ("All Files (*.*)\0*.*\0\0") ;

	ofn.lStructSize  = sizeof (OPENFILENAME) ; 
	ofn.hwndOwner = hWnd ; 	 
	ofn.hInstance = NULL ; 
	ofn.lpstrFilter = szFilter ;
	ofn.lpstrCustomFilter = NULL ;
	ofn.nMaxCustFilter = 0 ;
	ofn.nFilterIndex = 0 ;
	ofn.lpstrFile = NULL ; 
	ofn.nMaxFile = MAX_PATH ; 
	ofn.lpstrFileTitle = NULL ; 
	ofn.nMaxFileTitle = MAX_PATH ；
	ofn.lpstrInitialDir = NULL ;
	ofn.lpstrTitle = NULL ;
	ofn.Flags = 0 ; 
	ofn.nFileOffset = 0 ;
	ofn.nFileExtension = 0 ;
	ofn.lpstrDefExt = TEXT ("bmp") ; 
	ofn.lCustData = 0;
	ofn.lpfnHook = NULL ;
	ofn.lpTemplateName = NULL ;

[liuyusun]

楼主，你的应该是ofn没有设置正确

[sidney2008]

做个记号哈

[clever101]

[Quote=引用 5 楼 cqviolet 的回复:]

这个是我的参数的设置

C/C++ code

static TCHAR szFilter[] = TEXT ("BMP Files (*.BMP)\0*.bmp\0") \
TEXT ("JPEG Files (*.JPG)\0*.jpg\0") \
TEXT ("All Files (*.*)\0*.*\0\0") ;

ofn.lSt……
[/Quote]

ofn.lpstrFile = NULL ; 这句有问题，文件名缓冲区设置为NULL，能获取文件名才怪呢！