delphi - 在Delphi中用列表框替换stringgrid

Question

我试图分别用 listbox1 和 listbox2 替换 stringgrid1 和 stringgrid2 。他们有什么办法我可以做到吗？如果 listbox 不能做，有人建议我应该使用什么来代替 stringgrid 来显示信息？我是 Delphi 的新手。

这是我的代码:

procedure TForm2.FormCreate(Sender: TObject);
var i:integer;
begin
stringgrid1.ColWidths[0]:=20;
stringgrid2.ColWidths[0]:=20;
for i:=1 to 50 do begin
    stringgrid1.Cells[0,i]:=inttostr(i-1);
    stringgrid2.Cells[0,i]:=inttostr(i-1);
    stringgrid2.Cells[1,i]:='0';
end;
  stringgrid2.Cells[1,0]:='name';
  stringgrid1.Cells[1,0]:='extension';
  stringgrid1.Cells[2,0]:='format';
  stringgrid1.Cells[3,0]:='size';
  stringgrid1.Cells[4,0]:='date';
  stringgrid1.Cells[5,0]:='addres';
end;

procedure TForm2.StringGrid2DblClick(Sender: TObject);
begin
if (stringgrid2.Cells[1,stringgrid2.Row]<>'1024') and (stringgrid2.Cells[1,stringgrid2.Row]<>'0') then
  stringgrid1.Row:=strtoint(stringgrid2.Cells[1,stringgrid2.Row]);

end;

结束。

Procedure HD;
var i:integer;
begin
   for i:=0 to 50 do begin
     form2.StringGrid1.Cells[1,i+1]:=TABLE[i].name;
     form2.StringGrid1.Cells[2,i+1]:=TABLE[i].format;
     if TABLE[i].tip then
           form2.StringGrid1.Cells[3,i+1]:='folder'
     else
           form2.StringGrid1.Cells[3,i+1]:='file';
     form2.StringGrid1.Cells[4,i+1]:=inttostr(TABLE[i].nach);
     form2.StringGrid1.Cells[5,i+1]:=inttostr(TABLE[i].razmer);
     form2.StringGrid2.Cells[1,i+1]:=inttostr(fat[i]);;
   end;
end;

Answer 1

使用TListView而不是TStringGrid 。替换您的TStringGrid组件 TListView组件，设置其 ViewStyle至vsReport ，设置他们的Columns根据需要收集集合，然后按如下方式更新代码:

procedure TForm2.FormCreate(Sender: TObject); 
var
  i: integer; 
begin 
  // NOTE: this can all be done at design-time so
  // you don't need to do it in code at runtime!
  ListView1.Colums[0].Width := 20; 
  ListView2.Colums[0].Width := 20; 
  for i := 0 to 49 do begin 
    ListView1.Items.Add.Caption := IntToStr(i); 
    with ListView2.Items.Add do begin
      Caption := IntToStr(i); 
      SubItems.Add('0'); 
    end;
  end; 
  ListView2.Columns[1].Caption := 'name'; 
  ListView1.Columns[1].Caption := 'extension'; 
  ListView1.Columns[2].Caption := 'format'; 
  ListView1.Columns[3].Caption := 'size'; 
  ListView1.Columns[4].Caption := 'date'; 
  ListView1.Columns[5].Caption := 'addres'; 
end; 

procedure TForm2.ListView2DblClick(Sender: TObject); 
var
  Item: TListItem;
begin 
  Item := ListView2.Selected;
  if Item = nil then Exit;  
  if (Item.SubItems[0] <> '1024') and (Item.SubItems[0] <> '0') then 
    ListView1.Selected := ListView1.Items[StrToInt(Item.SubItems[0])];
end; 

procedure HD; 
var
  i: integer; 
begin 
  for i := 0 to 49 do begin 
    with form2.ListView1.Items[i] do begin
      SubItems[0] := TABLE[i].name;
      SubItems[1] := TABLE[i].format; 
      if TABLE[i].tip then 
        SubItems[2] := 'folder' 
      else 
        SubItems[2] := 'file'; 
      SubItems[3] := IntToStr(TABLE[i].nach); 
      SubItems[4] := IntToStr(TABLE[i].razmer); 
    end;
    form2.ListView2.Items[i].SubItems[0] := IntToStr(fat[i]);
  end; 
end;

话虽如此，取决于方式和时间TABLE[]和fat[]实际上已被填写，您可以通过设置 TListView.OwnerData 更进一步属性设置为 True 将 ListView 置于虚拟模式，然后使用 TListView.OnData动态显示数据的事件。这样，您就可以摆脱您的 HD()整个过程，因为您的数据不需要复制到TListView中它本身不再是，它可以从TABLE[]显示和fat[]直接代替，例如:

procedure TForm2.FormCreate(Sender: TObject); 
var
  i: integer; 
begin 
  // NOTE: this can all be done at design-time so
  // you don't need to do it in code at runtime!
  ListView1.Colums[0].Width := 20; 
  ListView2.Colums[0].Width := 20; 
  ListView2.Columns[1].Caption := 'name'; 
  ListView1.Columns[1].Caption := 'extension'; 
  ListView1.Columns[2].Caption := 'format'; 
  ListView1.Columns[3].Caption := 'size'; 
  ListView1.Columns[4].Caption := 'date'; 
  ListView1.Columns[5].Caption := 'addres'; 
  //

  ListView1.Items.Count := 50;
  ListView2.Items.Count := 50;
end; 

procedure TForm2.ListView2DblClick(Sender: TObject); 
var
  Item: TListItem;
begin 
  Item := ListView2.Selected;
  if Item = nil then Exit;  
  if (Item.SubItems[0] <> '1024') and (Item.SubItems[0] <> '0') then 
    ListView1.Selected := ListView1.Items[StrToInt(Item.SubItems[0])];
end; 

procedure TForm2.ListView1Data(Sender: TObject; Item: TListItem); 
begin 
  Item.Caption := IntToStr(Item.Index);
  Item.SubItems.Add(TABLE[Item.Index].name);
  Item.SubItems.Add(TABLE[Item.Index].format); 
  if TABLE[i].tip then 
    Item.SubItems.Add('folder') 
  else 
    Item.SubItems.Add('file'); 
  Item.SubItems.Add(IntToStr(TABLE[i].nach)); 
  Item.SubItems.Add(IntToStr(TABLE[i].razmer))
end;

procedure TForm2.ListView2Data(Sender: TObject; Item: TListItem);
begin
  Item.Caption := IntToStr(Item.Index);
  Item.SubItems.Add(IntToStr(fat[i]));
end;