Показать файлы с ассоциированными с ними иконками в TListView
01.01.2007
{
The following example shows how to show all files and their
associated icons of a folder in a TListView.
To test the code, you need a ListView1 and a ImageList1 where the icons are stored.
}
uses
ShellApi;
procedure LV_InsertFiles(strPath: string; ListView: TListView; ImageList: TImageList);
var
i: Integer;
Icon: TIcon;
SearchRec: TSearchRec;
ListItem: TListItem;
FileInfo: SHFILEINFO;
begin
// Create a temporary TIcon
Icon := TIcon.Create;
ListView.Items.BeginUpdate;
try
// search for the first file
i := FindFirst(strPath + '*.*', faAnyFile, SearchRec);
while i = 0 do
begin
with ListView do
begin
// On directories and volumes
if ((SearchRec.Attr and FaDirectory <> FaDirectory) and
(SearchRec.Attr and FaVolumeId <> FaVolumeID)) then
begin
ListItem := ListView.Items.Add;
//Get The DisplayName
SHGetFileInfo(PChar(strPath + SearchRec.Name), 0, FileInfo,
SizeOf(FileInfo), SHGFI_DISPLAYNAME);
Listitem.Caption := FileInfo.szDisplayName;
// Get The TypeName
SHGetFileInfo(PChar(strPath + SearchRec.Name), 0, FileInfo,
SizeOf(FileInfo), SHGFI_TYPENAME);
ListItem.SubItems.Add(FileInfo.szTypeName);
//Get The Icon That Represents The File
SHGetFileInfo(PChar(strPath + SearchRec.Name), 0, FileInfo,
SizeOf(FileInfo), SHGFI_ICON or SHGFI_SMALLICON);
icon.Handle := FileInfo.hIcon;
ListItem.ImageIndex := ImageList.AddIcon(Icon);
// Destroy the Icon
DestroyIcon(FileInfo.hIcon);
end;
end;
i := FindNext(SearchRec);
end;
finally
Icon.Free;
ListView.Items.EndUpdate;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
// Assign a Imagelist to the ListView
ListView1.SmallImages := ImageList1;
// Show Listview in Report Style and add 2 Columns
ListView1.ViewStyle := vsReport;
ListView1.Columns.Add;
ListView1.Columns.Add;
LV_InsertFiles('C:\Windows\', ListView1, ImageList1);
end;
Взято с сайта: https://www.swissdelphicenter.ch
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
Dialogs, comctrls, StdCtrls;
type
TForm1 = class(TForm)
ListView1: TListView;
Button1: TButton;
Button2: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
procedure SaveListViewToFile(AListView: TListView; sFileName: string);
procedure LoadListViewToFile(AListView: TListView; sFileName: string);
public
end;
const
Msg1 = 'File "%s" does not exist!';
Msg2 = '"%s" is not a ListView file!';
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.SaveListViewToFile(AListView: TListView; sFileName: string);
var
idxItem, idxSub, IdxImage: Integer;
F: TFileStream;
pText: PChar;
sText: string;
W, ItemCount, SubCount: Word;
MySignature: array[0..2] of Char;
begin
//Initialization
with AListView do
begin
ItemCount := 0;
SubCount := 0;
//****
MySignature := 'LVF';
// ListViewFile
F := TFileStream.Create(sFileName, fmCreate or fmOpenWrite);
F.Write(MySignature, SizeOf(MySignature));
if Items.Count = 0 then
// List is empty
ItemCount := 0
else
ItemCount := Items.Count;
F.Write(ItemCount, SizeOf(ItemCount));
if Items.Count > 0 then
begin
for idxItem := 1 to ItemCount do
begin
with Items[idxItem - 1] do
begin
//Save subitems count
if SubItems.Count = 0 then
SubCount := 0
else
SubCount := Subitems.Count;
F.Write(SubCount, SizeOf(SubCount));
//Save ImageIndex
IdxImage := ImageIndex;
F.Write(IdxImage, SizeOf(IdxImage));
//Save Caption
sText := Caption;
w := Length(sText);
pText := StrAlloc(Length(sText) + 1);
StrPLCopy(pText, sText, Length(sText));
F.Write(w, SizeOf(w));
F.Write(pText^, w);
StrDispose(pText);
if SubCount > 0 then
begin
for idxSub := 0 to SubItems.Count - 1 do
begin
//Save Item's subitems
sText := SubItems[idxSub];
w := Length(sText);
pText := StrAlloc(Length(sText) + 1);
StrPLCopy(pText, sText, Length(sText));
F.Write(w, SizeOf(w));
F.Write(pText^, w);
StrDispose(pText);
end;
end;
end;
end;
end;
F.Free;
end;
end;
procedure TForm1.LoadListViewToFile(AListView: TListView; sFileName: string);
var
F: TFileStream;
IdxItem, IdxSubItem, IdxImage: Integer;
W, ItemCount, SubCount: Word;
pText: PChar;
PTemp: PChar;
MySignature: array[0..2] of Char;
sExeName: string;
begin
with AListView do
begin
ItemCount := 0;
SubCount := 0;
sExeName := ExtractFileName(sFileName);
if not FileExists(sFileName) then
begin
MessageBox(Handle, PChar(Format(Msg1, [sExeName])), 'I/O Error',
MB_ICONERROR);
Exit;
end;
F := TFileStream.Create(sFileName, fmOpenRead);
F.Read(MySignature, SizeOf(MySignature));
if MySignature <> 'LVF' then
begin
MessageBox(Handle, PChar(Format(Msg2, [sExeName])), 'I/O Error',
MB_ICONERROR);
Exit;
end;
F.Read(ItemCount, SizeOf(ItemCount));
Items.Clear;
for idxItem := 1 to ItemCount do
begin
with Items.Add do
begin
//Read imageindex
F.Read(SubCount, SizeOf(SubCount));
//Read imageindex
F.Read(IdxImage, SizeOf(IdxImage));
ImageIndex := IdxImage;
//Read the Caption
F.Read(w, SizeOf(w));
pText := StrAlloc(w + 1);
pTemp := StrAlloc(w + 1);
F.Read(pTemp^, W);
StrLCopy(pText, pTemp, W);
Caption := StrPas(pText);
StrDispose(pTemp);
StrDispose(pText);
if SubCount > 0 then
begin
for idxSubItem := 1 to SubCount do
begin
F.Read(w, SizeOf(w));
pText := StrAlloc(w + 1);
pTemp := StrAlloc(w + 1);
F.Read(pTemp^, W);
StrLCopy(pText, pTemp, W);
Items[idxItem - 1].SubItems.Add(StrPas(pText));
StrDispose(pTemp);
StrDispose(pText);
end;
end;
end;
end;
F.Free;
end;
end;
// Example:
procedure TForm1.Button1Click(Sender: TObject);
begin
// Save Items and Clear the ListView
SaveListViewToFile(ListView1, 'MyListView.sav');
ListView1.Items.Clear;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
// Load Items
LoadListViewToFile(ListView1, 'MyListView.sav');
end;
Взято с Vingrad.ru https://forum.vingrad.ru