Listview_简单使用_(Virtual)

1、代码来自于“C:Program Files (x86)BorlandDelphi7DemosVirtual Listview”

　　1.1、是使用 ListView来显示数据

　　1.2、自己管理 ListView里面显示的信息（也就是说，不是像StringGrid那样一格一格内容往里面插入）

2、ListView 控件，属性设置：

　　2.1、ViewStyle 设置为 vsReport

　　2.2、OwnerData 设置为 true

　　2.3、双击 ListView，添加 几个列

　　2.4、GridLines 设置为 true

　　2.5、RowSelect 设置为 true

　　2.6、ReadOnly 设置为 true

3、测试程序界面：

4、测试代码：(Delphi7)

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ComCtrls, StdCtrls;

type
  TForm1 = class(TForm)
    ListView1: TListView;
    btnListViewTest01: TButton;
    btnListViewTest02: TButton;
    procedure btnListViewTest01Click(Sender: TObject);
    procedure ListView1Data(Sender: TObject; Item: TListItem);
    procedure btnListViewTest02Click(Sender: TObject);
  private
    Flist :TList;
  public
    { Public declarations }
  end;

  Pmsg =^Rmsg;
  Rmsg = record
    Fi1 :integer;
    Fi2 :integer;
    Fi3 :integer;
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.ListView1Data(Sender: TObject; Item: TListItem);
var p :Pmsg;
begin
  if ListView1.ViewStyle <> vsReport then Exit;
  if (Item.Index >= Flist.Count) then Exit;

  p := Flist.Items[Item.Index];
  Item.Caption := IntToStr(p.Fi1);
  Item.SubItems.Add(IntToStr(p.Fi2));
  Item.SubItems.Add(IntToStr(p.Fi3));
end;

procedure TForm1.btnListViewTest01Click(Sender: TObject);
var i :Integer;
    p :Pmsg;
begin
  if not Assigned(Flist) then
    Flist := TList.Create;
  if (Flist.Count <> 0) then
  begin
    for i:=0 to (Flist.Count-1) do
      FreeMem(Flist.Items[i], SizeOf(Rmsg));
    Flist.Clear;
  end;

  for i:=0 to 5 do
  begin
    GetMem(p, SizeOf(Rmsg));
    p.Fi1 := i;
    p.Fi2 := 10 + i;
    p.Fi3 := 20 + i;
    Flist.Add(p);
  end;
  ListView1.Items.Count := Flist.Count;
  ListView1.Repaint;
end;

procedure TForm1.btnListViewTest02Click(Sender: TObject);
var i :Integer;
    p :Pmsg;
begin
  if not Assigned(Flist) then
    Flist := TList.Create;
  if (Flist.Count <> 0) then
  begin
    for i:=0 to (Flist.Count-1) do
      FreeMem(Flist.Items[i], SizeOf(Rmsg));
    Flist.Clear;
  end;

  for i:=0 to 50 do
  begin
    GetMem(p, SizeOf(Rmsg));
    p.Fi1 := 100 + i;
    p.Fi2 := 200 + i;
    p.Fi3 := 300 + i;
    Flist.Add(p);
  end;
  ListView1.Items.Count := Flist.Count;
  ListView1.Repaint;
end;

end.

5、运行情况：

　　5.1、

　　5.2、

6、

7、

8、