树状图的问题

[lijucheng8]

下面是我用delphi 写的显示树状图的代码，只能显示一个部门，不知那里错了：
qryexec(qry1,'select * from bumen order by bmm');
TreeView1.Items.Clear ; //TreeView1是中文，TreeView2是ID,隐藏的
TreeView2.Items.Clear ;
inittree(qry1,TreeView1,TreeView2,0,true);

procedure inittree(qry:tadoquery;treeview:ttreeview;treeview1:ttreeview;parentid:integer;isExpanded:boolean);
var i:integer;
MyTreeNode,MyTreeNode1: TTreeNode;
tmpqry:tadoquery;
abc:string;
begin
if parentid=0 then
begin
MyTreeNode:=treeview.Items.Add(nil,'所有部门');
MyTreeNode.SelectedIndex :=1;
MyTreeNode1:=treeview1.Items.Add(nil,'id部门');
MyTreeNode1.SelectedIndex :=1;
end;
tmpqry:=tadoquery.Create(nil);
tmpqry:=qry;
tmpqry.Filter:='dirid='''+inttostr(parentid)+'''';
tmpqry.Filtered:=true;
tmpqry.first;
while not tmpqry.Eof do
begin
MyTreeNode:=treeview.Items.AddChild(MyTreeNode,tmpqry.fieldbyname('bm').asstring);
MyTreeNode1:=treeview1.Items.AddChild(MyTreeNode1,tmpqry.fieldbyname('id').asstring);
MyTreeNode.SelectedIndex:=1;
MyTreeNode1.SelectedIndex:=1;
inittree(tmpqry,treeview,treeview1,tmpqry.fieldbyname('id').AsInteger ,true);
tmpqry.Next;
end;
end;

[bdmh]

每次执行时，都会tmpqry.first;永远在第一条

[风之谷]

tmpqry.first;


逻辑错误

[lijucheng8]

去掉这句也是一样的：tmpqry.first;

[lijucheng8]

高手没在吗

[iamduo]

Filter 以后
First
Next
也是我喜欢的写法。

不过上次失败的时候，是我用 D2010 了。那个版本下，对这种做法貌似会无法执行。
D7下应该不会有问题。

你的版本是？

[kye_jufei]

請參考以下代碼再作修改：

1.自定義生成樹的過程：

procedure TRES_BOM_VIEW_F.CREATETREEVIEWMODEL;
var
  iLoop:Integer;
  Master,MasterNode:TTreeNode;
begin
  adoq_getop.Close;
  //SELECT distinct PARN_TYP FROM WWW where parn_typ<>'.' and parn_typ is not null order by PARN_TYP desc
  adoq_getop.SQL.Text:='SELECT distinct PARN_TYP FROM WWW where parn_typ<>''.'' and parn_typ is not null order by PARN_TYP desc';
  adoq_getop.Open;
  adoq_getop.First;
  cx_TV.Items.BeginUpdate;
  cx_TV.Items.Clear;
  Master:=cx_TV.Items.Add(nil,'昆盈BOM表檢視');
  while not adoq_getop.Eof do
  begin
    if adoq_getop.FieldByName('PARN_TYP').AsString<>'' then
    begin
      Screen.Cursor:=crSQLWait;
      MasterNode:=cx_TV.Items.AddChild(Master,VarToStr(adoq_getop.FieldValues['PARN_TYP']));
      Application.ProcessMessages;
      qry_op.Close;
      qry_op.SQL.Text:='SELECT DISTINCT PARN_LITM FROM WWW WHERE PARN_TYP='''+ VarToStr(adoq_getop.FieldValues['PARN_TYP'])+''' GROUP BY PARN_LITM';
      qry_op.Open;
      for iLoop:=0 to qry_op.RecordCount -1 do
      begin
        cx_TV.Items.AddChild(MasterNode,VarToStr(qry_op.FieldValues['PARN_LITM']));
        qry_op.Next;
      end;
      Application.ProcessMessages;
      cx_TV.Items.EndUpdate;
      Screen.Cursor:=crDefault;
    end;
    adoq_getop.Next;
    Application.ProcessMessages;
  end;
 {
  ThreadTView:=cx_TV;
  ViewThread:=TExpandLH.Create;
  ViewThread.Resume;
  }
end;

[kye_jufei]

2.調用過程並生成樹：

procedure TRES_BOM_VIEW_F.btnSB_SearchClick(Sender: TObject);
begin
  inherited;
  try
    RES_LOADING_F:=TRES_LOADING_F.Create(Self);
    RES_LOADING_F.Label1.Caption:='正在檢索相關數據......';
    RES_LOADING_F.Show;
    RES_LOADING_F.Update;
    CREATETREEVIEWMODEL;
  finally
    RES_LOADING_F.Close;
  end;
end;

[kye_jufei]

3.還有，不是多階樹狀圖關係請盡量不要使用遞歸的方法（如果確定需要遞歸，請在遞歸中再使用線程）；不然產生樹狀關係圖時速度會讓你吃不消...

[ilovemovieboy]

不必自己写了，用Ehlib 5.2直接显示树形结构记录。