请问怎样将一个listbox的所选项移到另一个listbox中去？

Question

listbox1.Items.Assign(listbox2.Items);
listbox2的选项会分配到listBox1中.
listbox2.clear;
就可以清除listbox2的选项.

Answer 1

listbox1往listbox2增加选种的，同时删除listbox1中选种的。
procedure TForm1.ListBox1DblClick(Sender: TObject);
var j,ii:integer;
begin
      Listbox1.DeleteSelected;
      j:=ListBox1.Count-1;
      for ii:=0 to j do
      begin
        if ListBox1.Selected[ii] then
        begin
          listbox2.Items.Add (listbox1.items[ii]);
          ListBox1.ItemIndex:=ii;
          listbox1.DeleteSelected;
        end;
      end;end;

Answer 2

***********************listbox1往listbox2增加，
procedure TForm1.ListBox1DblClick(Sender: TObject);
var i,j:integer;
begin     
   for i:=0 to listbox1.count-1 do
       begin
         if ListBox1.Selected[i] then
         begin
            for j:=0 to listbox2.count-1 do
               if listbox.items[i]=listbox2[i] then 
                  //listbox2已存该items
                  break;
           if j=listbox2.count+1 then  //没有重复的
              listbox2.Items.Add (listbox1.items[i]);
        end;
      end;
end;

Answer 3

没有这么复杂吗！可以参考：
listbox1.itmes:=listbox2.itmes;
即把listbox2的所有内容传递给listbox1

Answer 4

Delphi 自己带的例子。
unit Unit2;interfaceuses 
  Windows, Messages, SysUtils, Classes, Graphics, Forms, Dialogs, Controls, StdCtrls, 
  Buttons;type
  TDualListDlg = class(TForm)
    OKBtn: TButton;
    CancelBtn: TButton;
    HelpBtn: TButton;
    SrcList: TListBox;
    DstList: TListBox;
    SrcLabel: TLabel;
    DstLabel: TLabel;
    IncludeBtn: TSpeedButton;
    IncAllBtn: TSpeedButton;
    ExcludeBtn: TSpeedButton;
    ExAllBtn: TSpeedButton;
    procedure IncludeBtnClick(Sender: TObject);
    procedure ExcludeBtnClick(Sender: TObject);
    procedure IncAllBtnClick(Sender: TObject);
    procedure ExcAllBtnClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
    procedure MoveSelected(List: TCustomListBox; Items: TStrings);
    procedure SetItem(List: TListBox; Index: Integer);
    function GetFirstSelection(List: TCustomListBox): Integer;
    procedure SetButtons;
  end;var
  DualListDlg: TDualListDlg;implementation{$R *.dfm}procedure TDualListDlg.IncludeBtnClick(Sender: TObject);
var
  Index: Integer;
begin
  Index := GetFirstSelection(SrcList);
  MoveSelected(SrcList, DstList.Items);
  SetItem(SrcList, Index);
end;procedure TDualListDlg.ExcludeBtnClick(Sender: TObject);
var
  Index: Integer;
begin
  Index := GetFirstSelection(DstList);
  MoveSelected(DstList, SrcList.Items);
  SetItem(DstList, Index);
end;procedure TDualListDlg.IncAllBtnClick(Sender: TObject);
var
  I: Integer;
begin
  for I := 0 to SrcList.Items.Count - 1 do
    DstList.Items.AddObject(SrcList.Items[I], 
      SrcList.Items.Objects[I]);
  SrcList.Items.Clear;
  SetItem(SrcList, 0);
end;procedure TDualListDlg.ExcAllBtnClick(Sender: TObject);
var
  I: Integer;
begin
  for I := 0 to DstList.Items.Count - 1 do
    SrcList.Items.AddObject(DstList.Items[I], DstList.Items.Objects[I]);
  DstList.Items.Clear;
  SetItem(DstList, 0);
end;procedure TDualListDlg.MoveSelected(List: TCustomListBox; Items: TStrings);
var
  I: Integer;
begin
  for I := List.Items.Count - 1 downto 0 do
    if List.Selected[I] then
    begin
      Items.AddObject(List.Items[I], List.Items.Objects[I]);
      List.Items.Delete(I);
    end;
end;procedure TDualListDlg.SetButtons;
var
  SrcEmpty, DstEmpty: Boolean;
begin
  SrcEmpty := SrcList.Items.Count = 0;
  DstEmpty := DstList.Items.Count = 0;
  IncludeBtn.Enabled := not SrcEmpty;
  IncAllBtn.Enabled := not SrcEmpty;
  ExcludeBtn.Enabled := not DstEmpty;
  ExAllBtn.Enabled := not DstEmpty;
end;function TDualListDlg.GetFirstSelection(List: TCustomListBox): Integer;
begin
  for Result := 0 to List.Items.Count - 1 do
    if List.Selected[Result] then Exit;
  Result := LB_ERR;
end;procedure TDualListDlg.SetItem(List: TListBox; Index: Integer);
var
  MaxIndex: Integer;
begin
  with List do
  begin
    SetFocus;
    MaxIndex := List.Items.Count - 1;
    if Index = LB_ERR then Index := 0
    else if Index > MaxIndex then Index := MaxIndex;
    Selected[Index] := True;
  end;
  SetButtons;
end;end.

Answer 5

listbox2.Items.append(listbox1.Items[listbox1.itemIndex]);