TListView用法1

來源:互聯網
上載者:User

 

ListView1.Items 為標準 Tlistitems類
ListView1.Items
(1)賦值
with ListView1.Items.Add do
begin
Caption:=caption; //添加第一項
SubItems.add(aaaaa); //添加後面資料
SubItems.add(1234);
SubItems.add(1234);
end; //一定要使用WITH結構.
(2)取值
listview1.Items.Item[i].Caption 取得某條資料標題
listview1.Items.Item[i].SubItems.Strings[j] 取得某條資料內容
listview1.Items.Item[i].SubItems.CommaText 一條記錄的全部內容,
格式: "標題","內容1","內容2",....
listview1.Items.Item[i].SubItems.Text 一條記錄的全部內容,
格式: 標題,內容,內容2....

(3)刪除
listview1.Items.Item[i].Delete; 刪除一條資料
(4)資料類型(長度)定義
i:=ListView1.Items.Count 資料條數
listview1.Items.Item[i].Selected 該條資料選中否(MultiSelect決定單選複選)
(5)其他
ListView1.Items.Clear; 清除資料

Delphi ListView的用法(常用技巧)

//增加
             i := ListView1.Items.Count;
             with ListView1 do
             begin
               ListItem:=Items.Add;
               ListItem.Caption:= IntToStr(i);
               ListItem.SubItems.Add('第 '+IntToStr(i)+' 行');
               ListItem.SubItems.Add('第三列內容');
             end;

//按標題刪除
             for i:=ListView1.Items.Count-1 downto 0 Do
               if ListView1.Items[i].Caption = Edit1.Text then
               begin
                 ListView1.Items.Item[i].Delete();             //刪除當前選中行
               end;

//選中一行
             if ListView1.Selected <> nil then
             Edit1.Text := ListView1.Selected.Caption;

//              listview1.Items[Listview1.Items.Count -1].Selected := True;
//              listview1.Items[Listview1.Items.Count -1].MakeVisible(True);  
procedure TForm1.Button2Click(Sender: TObject); // 選擇第一條
begin
             listview1.SetFocus;
             listview1.Items[0].Selected := True;
end;

procedure TForm1.Button1Click(Sender: TObject);             // 選擇最後一條
begin
             listview1.SetFocus;
             listview1.Items[Listview1.Items.Count -1].Selected := True;
end;  

//這是個通用的過程
procedure ListViewItemMoveUpDown(lv : TListView; Item : TListItem; MoveUp, SetFocus : Boolean);
var
             DestItem : TListItem;
begin
             if (Item = nil) or
                ((Item.Index - 1 < 0) and MoveUp) or
                ((Item.Index + 1 >= lv.Items.Count) and (not MoveUp))
               then Exit;
             lv.Items.BeginUpdate;
             try
               if MoveUp then
                 DestItem := lv.Items.Insert(Item.Index - 1)
               else
                 DestItem := lv.Items.Insert(Item.Index + 2);
               DestItem.Assign(Item);
               lv.Selected := DestItem;
               Item.Free;
             finally
               lv.Items.EndUpdate;
             end;
             if SetFocus then lv.SetFocus;
             DestItem.MakeVisible(False);
end;

//此為調用過程,可以任意指定要移動的Item,下面是當前(Selected)Item
             ListViewItemMoveUpDown(ListView1, ListView1.Selected, True, True);//上移
             ListViewItemMoveUpDown(ListView1, ListView1.Selected, False, True);//下移

TListView組件使用方法

引用CommCtrl單元

procedure TForm1.Button1Click(Sender: TObject);
begin
             ListView_DeleteColumn(MyListView.Handle, i);//i是要刪除的列的序號,從0開始

end;

用LISTVIEW顯示表中的資訊:
procedure viewchange(listv:tlistview;table:tcustomadodataset;var i:integer);
             begin
               tlistview(listv).Items.BeginUpdate;              {listv:listview名}
               try
                 tlistview(listv).Items.Clear;
                 with table do                    {table or query名}
                 begin
                   active:=true;
                   first;
                   while not eof do
                   begin
                     listitem:=tlistview(listv).Items.add;
                     listitem.Caption:=trim(table.fields[i].asstring);
//                     listitem.ImageIndex:=8;
                     next;
                   end;
                 end;
               finally
                 tlistview(listv).Items.EndUpdate;
               end;
end;

ListView使用中的一些要點。以下以一個兩列的ListView為例。
            →增加一行:
with ListView1 do
            begin
              ListItem:=Items.Add;
              ListItem.Caption:='第一列內容';
              ListItem.SubItems.Add('第二列內容');
            end;
            →清空ListView1:
ListView1.Items.Clear;
            →得到當前被選中行的行的行號以及刪除當前行:
For i:=0 to ListView1.Items.Count-1 Do
            If ListView1.Items[i].Selected then            //i=ListView1.Selected.index
              begin
                ListView1.Items.Delete(i);            //刪除當前選中行
              end;
當然,ListView有OnSelectItem事件,可以判斷選擇了哪行,用個全域變數把它賦值出來。
            →讀某行某列的操作:
Edit1.Text := listview1.Items[i].Caption;            //讀第i行第1列
Edit2.Text := listview1.Items[i].SubItems.strings[0];            //讀第i行第2列
Edit3.Text := listview1.Items[i].SubItems.strings[1];            //讀第i行第3列
以次類推,可以用迴圈讀出整列。
            →將焦點上移一行:
For i:=0 to ListView1.Items.Count-1 Do
            If (ListView1.Items[i].Selected) and (i>0) then
              begin
                ListView1.SetFocus;
                ListView1.Items.Item[i-1].Selected := True;
              end;
不過在Delphi6中,ListView多了一個ItemIndex屬性,所以只要
ListView1.SetFocus;
ListView1.ItemIndex:=3;
就能設定焦點了。

Delphi的listview能實現交替顏色嗎?
procedure TForm1.ListView1CustomDrawItem(
       Sender: TCustomListView; Item: TListItem; State: TCustomDrawState;
       var DefaultDraw: Boolean);
var
       i: integer;
begin
       i:= (Sender as TListView).Items.IndexOf(Item);
       if odd(i) then sender.Canvas.Brush.Color:= $02E0F0D7
       else sender.Canvas.Brush.Color:= $02F0EED7;
       Sender.Canvas.FillRect(Item.DisplayRect(drIcon));
end;

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