如何从确定点向ListView的第三列添加数据？

Question

我的目标是添加信息，指的是必须保留在 ListView 的第三列中的每个文件（仅文件）的大小。

我下面的尝试没有成功。哪里错了？

type
  TForm1 = class(TForm)
    btn1: TButton;
    LV1: TListView;
    procedure btn1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  ListSize: TStrings;

implementation

{$R *.dfm}

function ListFolders(Directory: String): string;
var
  FileName, Dirlist: string;
  SearchRec: TWin32FindData;
  FindHandle: THandle;
  ReturnStr: string;
begin
  ReturnStr := '';

  try
    FindHandle := FindFirstFile(PChar(Directory + '*.*'), SearchRec);
    if FindHandle <> INVALID_HANDLE_VALUE then
      repeat
        FileName := SearchRec.cFileName;
        if ((SearchRec.dwFileAttributes and FILE_ATTRIBUTE_DIRECTORY) <> 0) then
          Dirlist := Dirlist + (FileName + #13);
      until FindNextFile(FindHandle, SearchRec) = False;
  finally
    Winapi.Windows.FindClose(FindHandle);
  end;
  ReturnStr := (Dirlist);
  Result := ReturnStr;
end;

function FileSizeStr(FileName: string): string;
const
  // K = Int64(1000);     // Comment out this line OR
  K = Int64(1024); // Comment out this line
  M = K * K;
  G = K * M;
  T = K * G;
var
  size: Int64;
  handle: integer;
begin
  handle := FileOpen(FileName, fmOpenRead);
  if handle = -1 then
    Result := 'Unable to open file ' + FileName
  else
    try
      size := FileSeek(handle, Int64(0), 2);
      if size < K then
        Result := Format('%d bytes', [size])
      else if size < M then
        Result := Format('%f KB', [size / K])
      else if size < G then
        Result := Format('%f MB', [size / M])
      else if size < T then
        Result := Format('%f GB', [size / G])
      else
        Result := Format('%f TB', [size / T]);
    finally
      FileClose(handle);
    end;
end;

function GetFiles(FileName, Ext: String): String;
Var
  SearchFile: TSearchRec;
  FindResult: integer;
  ListFiles: TStrings;
begin
  ListFiles := TStringlist.Create;
  ListSize := TStringlist.Create;
  FindResult := FindFirst(FileName + Ext, faArchive, SearchFile);
  try
    While FindResult = 0 do
    begin
      Application.ProcessMessages;
      ListFiles.Add(SearchFile.Name);
      ListSize.Add(FileSizeStr(FileName + SearchFile.Name));
      FindResult := FindNext(SearchFile);
    end;
  finally
    FindClose(SearchFile)
  end;
  Result := ListFiles.Text;
end;

procedure TForm1.btn1Click(Sender: TObject);
var
  L: TListItem;
  vListFolders, vListSize, vListFiles: TStringlist;
  i, j, k: integer;
begin

  LV1.Clear;

  vListFolders := TStringlist.Create;
  vListFiles := TStringlist.Create;
  vListSize := TStringlist.Create;

  vListFolders.Text := ListFolders('C:\');
  vListFiles.Text := GetFiles('C:\', '*.*');
  vListSize.Text := ListSize.Text;

  for i := 0 to vListFolders.Count - 1 do
  begin
    L := LV1.Items.Add;
    L.Caption := vListFolders.Strings[i];
    L.SubItems.Add('Folder');
  end;

  for j := 0 to vListFiles.Count - 1 do
  begin
    L := LV1.Items.Add;
    L.Caption := vListFiles.Strings[j];
    L.SubItems.Add('File');
  end;

  ///////////////////////////////////////

  for k := 0 to vListSize.Count - 1 do
  begin
    L := LV1.Items.Add;
    L.Caption := vListSize.Strings[k];
    // L.SubItems.Add(vListSize.Strings[k]);
  end;

  ///////////////////////////////////////

  vListFolders.Free;
  vListFiles.Free;
  vListSize.Free;
end;

版本:

I need of handle each column singly, because these data will come of client side of my application of Remote Adminitration and is requested each data separately. First is requested Folders -> comes Folders, after Files -> comes Files, and by last the size of each file that is stored on client side of same way that was showed above. Consider the code of Button like my receiver (server side) :D.

例如（接收文件夹，然后请求文件）：

if Pos('<|Folder|>', s) > 0 then
      begin
        s2 := s;
        Delete(s2, 1, Pos('<|Folder|>', s2) + 9);
        s2 := Copy(s2, 1, Pos('<<|', s2) - 1);
        Lista := TStringList.Create;
        Lista.Text := s2;
        // showmessage('ra');
        L2 := Form1.LV1.FindCaption(0, intToStr(Socket.Handle), false, true, false);
        (L2.SubItems.Objects[4] as TForm3).ListView1.Clear;
        // Application.MessageBox(PChar(Lista.Text), ' ', 48);
        for i := 0 to Lista.count - 1 do
        begin

          L := (L2.SubItems.Objects[4] as TForm3).ListView1.Items.Add;
          L.ImageIndex := 0;

          Sleep(10);
          L.Caption := Lista.Strings[i];
          L.SubItems.Add('Folder');
        end;

        if (L2.SubItems.Objects[4] as TForm3).ListView1.Items[0].Caption = '..' then
           (L2.SubItems.Objects[4] as TForm3).ListView1.Items[0].ImageIndex := 5;

        Lista.Free;
        Socket.SendText('<|Files|>' + (L2.SubItems.Objects[4] as TForm3).Edit1.Text + '<<|');
      end;

Answer 1

您的函数 GetFiles(...) 不会同时向两个不同的 TStringlist 添加两个值。

function GetFiles(FileName, Ext: String): String;
    ...
    ListFiles.Add(SearchFile.Name);
    ListSize.Add(FileSizeStr(FileName + SearchFile.Name));
    ...

可以直接添加到Listview中

var
  ListFiles: TStrings;
  ListSize : TStrings;
.....
.....

function GetFiles(FileName, Ext: String): String;
Var
  SearchFile: TSearchRec;
  FindResult: integer;
  cCount    : Integer;
begin
  Result     := 'NOT NEEDED';
  cCount     := LV1.Items.Count -1;

  FindResult := FindFirst(FileName + Ext, faArchive, SearchFile);
  try
    While FindResult = 0 do
    begin

      inc(cCount);
      LV1.Items.Add;
      LV1.Items[cCount].Caption := SearchFile.Name;
      LV1.Items[cCount].SubItems.Add('File');
      LV1.Items[cCount].SubItems.Add(FileSizeStr(FileName + SearchFile.Name));
      // C:\ + SearchFile.Name

    FindResult := FindNext(SearchFile);
    end;
  finally
    windows.FindClose(SearchFile)
  end;
end;

如果你一定要在 procedure TForm1.btn1Click(...)

var
  ListFiles: TStrings;
  ListSize : TStrings;
.....

.....

function GetFiles(FileName, Ext: String): String;
Var
  SearchFile: TSearchRec;
  FindResult: integer;
begin
  FindResult := FindFirst(FileName + Ext, faArchive, SearchFile);
  try
    While FindResult = 0 do
    begin
      ListFiles.Add(SearchFile.Name);
      ListSize.Add(FileSizeStr(FileName + SearchFile.Name));
      FindResult := FindNext(SearchFile);
    end;
  finally
    windows.FindClose(SearchFile)
  end;
  Result := 'NOT NEEDED';
end;

procedure TForm1.btn1Click(Sender: TObject);
var
  vListFolders : TStringlist;
  i, j, cCount : integer;
begin
  ListFiles    := TStringlist.Create;
  ListSize     := TStringlist.Create;
  vListFolders := TStringlist.Create;

  LV1.Items.Clear;
  try   
    vListFolders.Text := ListFolders('C:\');
    GetFiles('C:\', '*.*'); // Add to ListFiles, ListSize Name and size  

  // Old Only for folders ...
  // ========================================

    for i := 0 to vListFolders.Count - 1 do
    begin
      L := LV1.Items.Add;
      L.Caption := vListFolders.Strings[i];
      L.SubItems.Add('Folder');
    end;

  // New for name and size
  // ========================================
    cCount := LV1.Items.Count -1;

    if ListFiles.Count = ListSize.Count then
    begin

     for j := 0 to ListFiles.Count - 1 do
     begin
        Inc(cCount);
        LV1.Items.Add;
        LV1.Items[cCount].Caption := ListFiles[j];    // File Name
        LV1.Items[cCount].SubItems.Add('File');       // File
        LV1.Items[cCount].SubItems.Add(ListSize[j]);  // Formatted Size
     end; // for j

    end else begin
        Inc(cCount);
        LV1.Items.Add;
        LV1.Items[cCount].Caption := 'File List BROKEN';
    end;

  finally
    vListFolders.Free;
    ListFiles.Free;
    ListSize .Free;
  end;

end; // btn1Click(...)

如何从确定点向ListView的第三列添加数据？

How add data to a third column of ListView from of a determinated point?

delphi

tlistview