Platform: Windows
Language: C
IDE: Visual Studio 2019 Community

I'm doing a reading and writing Windows configuration file (*. Ini) small programs, the configuration file directory is pure Numbers, not the pure digital directory without configuration file, the program used in the FindFirstFile and FindNextFile enumerated by a given directory, and then get a given directory contains only numeric characters subdirectory name, in a drop-down list box (combo box, ComboBox),
The following is the code:

 LRESULT CALLBACK WndProc (HWND HWND, UINT message, WPARAM WPARAM, LPARAM LPARAM) 
{
HDC HDC. 
PAINTSTRUCT ps; 
The static HWND hComboBox; 

The switch (the message) 
{
Case WM_CREATE message handler: 
HComboBox=CreateWindow (WC_COMBOBOX, 
The TEXT (" "), 
CBS_DROPDOWN | WS_CHILD | WS_VISIBLE | WS_VSCROLL | CBS_SORT, 
In 90, 23, 130, 400, 
HWND, NULL, NULL, NULL); 

The static TCHAR Folder [MAX_PATH]; 
WIN32_FIND_DATA FFD. 
HANDLE hFind=INVALID_HANDLE_VALUE; 
DWORD dwError=0; 
Retrieves the hr=SHGetFolderPathW (CSIDL_MYDOCUMENTS 0, 0, 0, Folder). 
If (SUCCEEDED (hr)) 
{
StringCchCat (Folder, MAX_PATH, TEXT (" \ \ work ")); 

If (DirectoryExists (Folder)) 
{
StringCchCat (Folder, MAX_PATH, TEXT (" \ \ * ")); 
HFind=FindFirstFile (Folder, & amp; FFD); 
} 
The else 
{
MessageBox (HWND, TEXT (" directory does not exist. "), TEXT (" error "), MB_ICONERROR); 
} 

If (INVALID_HANDLE_VALUE=hFind https://bbs.csdn.net/topics/=
{
return 0; 
} 

Do 
{
If (FFD) cFileName [0]=='. ') continue;//to skip the current directory ". ", the higher level directory ".. "And hidden directory 

If (FFD) dwFileAttributes & amp; FILE_ATTRIBUTE_DIRECTORY)//as long as the directory, don't file 
{
BOOL onlyDigit=TRUE; 

for (int i=0; I & lt; Sizeof (FFD. CFileName); I++) 
{
If (FFD) cFileName [I] <'0' | | FFD. CFileName [I] & gt; '9') 
{
OnlyDigit=FALSE; 
} 
} 

If (onlyDigit) 
{
//will be only number inside the directory name in the drop-down list box 
SendMessage (hComboBox, (UINT) CB_ADDSTRING, (WPARAM) 0, (LPARAM) FFD. CFileName); 
} 
} 
} 
While (FindNextFile (hFind, & amp; FFD)!=0); 

FindClose (hFind); 
} 
The else 
{
MessageBox (HWND, TEXT (" Failed to get the special folder. "), TEXT (" ERROR "), MB_ICONERROR); 
} 
[other code snippet] 

In the above the do... Inside the while loop, first using the

 if (FFD) cFileName [0]=='. ') continue; 

to filter out the current directory. "", on one level", "and hide the directory, and then use the

 if (FFD) cFileName [I] <'0' | | FFD. CFileName [I] & gt; '9') 

traverse the directory name of each character, if contains non-numeric characters, will skip the directory name, dealing with a directory name,

However, after the program is running, ComboBox inside what also have no, is empty,

Don't know where is the code above is wrong, or there is a better way to judge whether directory name pure digital, also please tell bosses,

Before and WinForm to do this small program in C #, now change to C and Win32 GDI, suddenly feel face in C # Windows directory, file, string handling more relaxed many, but under the Windows 10 WinForm can't compatible with Windows 7 (need to install the corresponding. NetFramework), but also to call C # inside GetPrivateProfileString the Windows API function to read and write ini files, so use C to write Win32,

String processing problems now, for a while do not know what to get, if the string is in pure C language string handling ok (like the above code should be can normal operation), but now is in the Windows environment, save the children...

CodePudding user response:

Program design problem of a class, the development of language should not be sent to the corresponding section?
I think, in the first Ln59 SendMessage () up and down the breakpoint, see if it is triggered, to identify the problems in finding judgment, or a list control; And then finally determine the problem again,