WriteFile

[shadowmaster]

hi ich bins mal wieder....

die datei wird erstellt nur hat er mit WriteFile irgendein Problem zumindest schreibt er nicht in die erstellte datei... Was hab ich falsch gemacht ? die MSDN gibt mir auch nicht die erwünschte lösung..:(

#include <windows.h>
#include "resource.h"
#include <commdlg.h>

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
	static char szAppName[] = "Name" ;
	HWND        hwnd ;
	MSG         msg ;
	WNDCLASSEX  wndclass ;

	wndclass.cbSize        = sizeof (wndclass) ;
	wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
	wndclass.lpfnWndProc   = WndProc ;
	wndclass.cbClsExtra    = 0 ;
	wndclass.cbWndExtra    = 0 ;
	wndclass.hInstance     = hInstance ;
	wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
	wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
	wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
	wndclass.lpszMenuName  = NULL ;
	wndclass.lpszClassName = szAppName ;
	wndclass.hIconSm       = LoadIcon (NULL, IDI_APPLICATION) ;
	wndclass.lpszMenuName  = MAKEINTRESOURCE(IDR_MENU2);

	RegisterClassEx (&wndclass) ;

	hwnd = CreateWindow (szAppName, "C&D Editor", WS_OVERLAPPEDWINDOW,
	CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
	NULL, NULL, hInstance, NULL) ;

	ShowWindow (hwnd, iCmdShow) ;
	UpdateWindow (hwnd) ;

	while (GetMessage (&msg, NULL, 0, 0))
	{
		TranslateMessage (&msg) ;
		DispatchMessage (&msg) ;
	}
	return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{

	OPENFILENAME ofn;       // common dialog box structure
	char szFile[260];       // buffer for file name
	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.

	HDC hdc;
	PAINTSTRUCT ps;
	static HINSTANCE hInstance;
	static HWND hEditMain;
	int platzzuallenseiten=0;
	//LPVOID lpBuffer;
	static char filename[] = "";  
    DWORD filesize;
	DWORD bytesRead = 0; 

	switch (iMsg)
	{
		case WM_PAINT:
		{
			hdc = BeginPaint (hwnd, &ps);
			EndPaint (hwnd, &ps);
			break;
		}
		case WM_CREATE:
		{
			hEditMain = CreateWindowEx(WS_EX_CLIENTEDGE,"Edit","",WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_MULTILINE |ES_AUTOVSCROLL,0, 0, 0, 0,hwnd,NULL,((LPCREATESTRUCT) lParam) -> hInstance,NULL);
			break;
		}
		case WM_SIZE:
		{
			MoveWindow(hEditMain,platzzuallenseiten,platzzuallenseiten,LOWORD(lParam)-2*platzzuallenseiten,HIWORD(lParam)-2*platzzuallenseiten,1);

		}
		case WM_COMMAND:
		{
			switch(wParam)
			{
				case ID_DATEI_SPEICHERN:
				{
// um den folgenenden codebschnitt handelt s sich 
			    	if (GetSaveFileName(&ofn)==TRUE)
			 hf = CreateFile(ofn.lpstrFile,          
             GENERIC_WRITE,                
             0,                           
             NULL,                        
             CREATE_ALWAYS,                
             FILE_ATTRIBUTE_NORMAL |      
             FILE_FLAG_OVERLAPPED,         
             NULL);    

				  DWORD bytesRead = 0; 
                  filesize = GetFileSize(hf, NULL); 
				  int nLength = GetWindowTextLength(hEditMain)+1; 
				  LPTSTR pszText = new TCHAR[nLength]; 
				  GetWindowText(hEditMain, pszText, nLength); 

                  WriteFile(hf, pszText, nLength, &bytesRead, NULL); // was ist daran falsch ?
				  CloseHandle(hf); 

					break;
				}
				case ID_DATEI_OEFFNEN:
				{
					if (GetOpenFileName(&ofn)==TRUE)
					{
					hf = CreateFile(ofn.lpstrFile, GENERIC_READ,
					0, (LPSECURITY_ATTRIBUTES) NULL,
					OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
					(HANDLE) NULL);
					}
					if (hf == INVALID_HANDLE_VALUE)
					{
						break;
					}  
					else { 

                  filesize = GetFileSize(hf, NULL); 
				  char textdaten[10000];
				  ZeroMemory(textdaten,sizeof(textdaten));

                  ReadFile(hf, &textdaten, filesize, &bytesRead, NULL); 
				  CloseHandle(hf); 
                  SetWindowText(hEditMain, textdaten); 
					}
		break;
				}

			}return 0;

			break;
		}
		case WM_DESTROY :
		{
			PostQuitMessage (0) ;
			return 0 ;
		}
	}
	return DefWindowProc (hwnd, iMsg, wParam, lParam) ;
}

so wie ich mich kenne ist es nur nen kleiner denkfehler ..

[Hepi]

Zitat MSDN:

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Was sagt denn GetLastError?

[flenders]

Ist denn der CreateFile Aufruf erfolgreich?
btw: der if(GetSaveFileName(&ofn)==TRUE) Block sollte sich über das ganze Schreiben etc. erstrecken -> { }

[shadowmaster]

habs nun hinbekommmen..danke trotzdem