ListView的用法

//增加
i :
= ListView1.Items.Count;
with ListView1 do
begin
ListItem:
=Items.Add;
ListItem.Caption:
= IntToStr(i);
ListItem.SubItems.Add(
''+IntToStr(i)+'');
ListItem.SubItems.Add(
'第三列内容');
end;
//按标题删除
for i:=ListView1.Items.Count-1 downto 0 Do
if ListView1.Items[i].Caption = Edit1.Text then
begin
ListView1.Items.Item[i].Delete();
//删除当前选中行
end;
//选中一行
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); // 选择第一条
begin
listview1.SetFocus;
listview1.Items[
0].Selected := True;
end;
procedure TForm1.Button1Click(Sender: TObject); // 选择最后一条
begin
listview1.SetFocus;
listview1.Items[Listview1.Items.Count
-1].Selected := True;
end;
//这是个通用的过程
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;
//此为调用过程,可以任意指定要移动的Item,下面是当前(Selected)Item
ListViewItemMoveUpDown(ListView1, ListView1.Selected, True, True);
//上移
ListViewItemMoveUpDown(ListView1, ListView1.Selected, False, True);
//下移

TListView组件使用方法
引用CommCtrl单元
procedure TForm1.Button1Click(Sender: TObject);
begin
ListView_DeleteColumn(MyListView.Handle, i);
//i是要删除的列的序号,从0开始
end;
用LISTVIEW显示表中的信息:
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使用中的一些要点。以下以一个两列的ListView为例。
→增加一行:
with ListView1 do
begin
ListItem:
=Items.Add;
ListItem.Caption:
='第一列内容';
ListItem.SubItems.Add(
'第二列内容');
end;
→清空ListView1:
ListView1.Items.Clear;
→得到当前被选中行的行的行号以及删除当前行:
For i:
=0 to ListView1.Items.Count-1 Do
If ListView1.Items[i].Selected
then //i=ListView1.Selected.index
begin
ListView1.Items.Delete(i);
//删除当前选中行
end;
当然,ListView有OnSelectItem事件,可以判断选择了哪行,用个全局变量把它赋值出来。
→读某行某列的操作:
Edit1.Text :
= listview1.Items[i].Caption; //读第i行第1列
Edit2.Text :
= listview1.Items[i].SubItems.strings[0]; //读第i行第2列
Edit3.Text :
= listview1.Items[i].SubItems.strings[1]; //读第i行第3列
以次类推,可以用循环读出整列。
→将焦点上移一行:
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;
不过在Delphi6中,ListView多了一个ItemIndex属性,所以只要
ListView1.SetFocus;
ListView1.ItemIndex:
=3;
就能设定焦点了。

Delphi的listview能实现交替颜色么?
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;

posted on 2008-11-27 13:27  jxgxy  阅读(1279)  评论(0编辑  收藏  举报

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