|
Creating a Directory Listing in a Single-Selection List Box
The following example demonstrates how to display the content of the current
directory in a list box and enable the user to delete one file at a time.
In addition to the standard list box styles, this list box has the
LBS_MULTICOLUMN and LBS_HSCROLL styles. The code initializes the list box by using the DlgDirList function to fill the list box with the names of all the files in the current
directory. When the user chooses the Delete button, the DlgDirSelectEx function retrieves the name of the selected file. The code deletes the file
by using the DeleteFile function and updates the directory list box by sending the LB_DELETESTRING message.
#define BUFFER MAX_PATH
/*
* FUNCTION: DlgDelFileProc(HWND, unsigned, UINT, LONG)
*
* PURPOSE: "Delete File" dialog box
*/
BOOL APIENTRY DlgDelFileProc(
HWND hDlg, /* window handle of dialog box */
UINT message, /* type of message */
UINT wParam, /* message-specific information */
LONG lParam)
{
DWORD cchCurDir;
LPTSTR lpszCurDir;
LPTSTR lpszFileToDelete;
int nItem;
int nTotal;
TCHAR tchBuffer[BUFFER];
BOOL fResult;
switch (message) {
case WM_INITDIALOG:
/*
* Initialize the list box by filling it with files from
* the current directory.
*/
lpszCurDir = tchBuffer;
GetCurrentDirectory(cchCurDir, lpszCurDir);
DlgDirList(hDlg, lpszCurDir, IDL_FILES, IDS_PATHTOFILL, 0);
SetFocus(GetDlgItem(hDlg, IDL_FILES));
return FALSE;
case WM_COMMAND:
switch (LOWORD(wParam)) {
case IDOK:
/*
* When the user presses the DEL (IDOK) button,
* delete the selected file.
*/
lpszFileToDelete = tchBuffer;
DlgDirSelectEx(hDlg, lpszFileToDelete, MAX_PATH,
IDL_FILES);
fResult = DeleteFile(lpszFileToDelete);
if (!fResult) {
MessageBox(hDlg, "Could not delete file.",
NULL, MB_OK);
}
else {
nItem = SendMessage(GetDlgItem(hDlg, IDL_FILES),
LB_GETCURSEL, 0, 0);
nTotal = SendMessage(GetDlgItem(hDlg,
IDL_FILES), LB_DELETESTRING, nItem, 0);
/* Update the list box. */
if (nTotal > nItem) {
SendMessage(GetDlgItem(hDlg, IDL_FILES),
LB_SETCURSEL, nItem, 0);
}
else {
SendMessage(GetDlgItem(hDlg, IDL_FILES),
LB_SETCURSEL, nTotal, 0);
}
}
return TRUE;
case IDCANCEL:
/* Destroy the dialog box. */
EndDialog(hDlg, TRUE);
return TRUE;
default:
return FALSE;
}
default:
return FALSE;
}
}
| Last news from Greatis Software |
 |
|
Nostalgia .Net |
|
.Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More » |
| Recommended software for developers |
 |
|
Ultimate Pack |
|
Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More » |
 |
|
Form Designer .Net |
|
Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More » |
 |
|
Print Suite .Net |
|
Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More » |
 |
|
Gradient Controls .Net |
|
Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More » |
 |
|
Greatis iGrid |
|
iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More » |
All the contacts and projectsDmitry Vasiliev (just.dmitry)
Related LinksSoftware for Visual Studio .NET developers
Software for Delphi and C++ Builder developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET More Online Helps Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages
|
