一个树使用的实例,仅供参考..

2008-07-03 05:27:25 265 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

自抗扰控制(ADRC)原理与MATLAB实现详解自抗扰控制(ADRC)是一种先进的鲁棒控制策略，其核心在于通过扩张状态观测器(ESO)实时估计并补偿系统总扰动。相比传统PID控制，ADRC不依赖精确数学模型，特别适合处理非线性、时变系统。从控制原理看，ADRC将系统内部动态和外部扰动统一建模，通过带宽参数化方法实现快速响应与强抗扰能力。在工程实践中，ADRC已成功应用于无人机飞控、伺服系统等场景，MATLAB仿真显示其上升时间可比PID提升46%，抗扰动恢复时间缩短60%。典型实现包含ESO设计、扰动补偿和PD控制三部分，参数整定遵循ω₀=3~5倍系统带阅读详情

最近在网上看到很多人问TREEVIEW的使用方法,当然,例子代码也非常多,这是我之前写的,将以下代码贴出来,抛砖引玉,仅供参考一下,
本人水平有限,只能实现一些简单的功能...各位牛人别拍砖啊..-_-...
注: 在 FormShow 中的 Filter 只是为了进行权限判断,只加载具备条件的节点,少了一段代码,就是在保存之后插入一个
节点和数组元素...

--------------------------------------------------------------------------------------------
表结构:
dp_companytype dp_company
------------------------------------------------------------------
Coid char Companytypeid int
Companytypeid int parentid int
AreaID int
isopen bit
name char

数据:
dp_companytype dp_company
_________________________________________________ ____________________________________________
parentid | Companytypeid | Areaname Companytypeid | coid | isopen | name
_________________|__________________|____________ _________________|______|_________|_________
0 | 1 | 华南区 1 | 001 | 1 | test1
_________________|__________________|____________ _________________|______|_________|_________
1 | 2 | 广东省 2 | 002 | 0 | test2
_________________|__________________|____________ _________________|______|_________|_________
2 | 3 | 深圳市 3 | 003 | 0 | test3
_________________|__________________|____________ _________________|______|_________|_________
2 | 4 | 广州市 5 | 004 | 1 | test4
_________________|__________________|____________ _________________|______|_________|_________
3 | 5 | 福田区 4 | 005 | 1 | test5
_________________|__________________|____________ _________________|______|_________|_________
6 | 006 | 1 | test6
_________________|______|_________|_________
------------------------------------------------------------------------------------------------------------

1.树节点添加流程:
(1) 首先从 dp_companytype 表中加载出所有的地区,形成一个一级节点,AddParentNode过程
所有区域
|
|---华南区
| |
| |___广东省
| | |
| | |___广州市
| | |
| | |
| | |
| | |___深圳市
| | | |
| | | |---福田区
| | | |

(2) 之后再从 dp_company 表中查询 Companytypeid 与 dp_companytype 表中 Companytypeid 相同的记录,将其添加到相应的区域下
AddChildNode(ChildNode:TTreeNode;nCompanytypeid:integer;Isparentid:boolean);
参数说明 : 1.新增子节点的父节点,2.查找的二级节点ID,3.该节点是否无父节点

(3) dp_company 表中有些 Companytypeid 在 dp_companytype 中不存在,当然也要加载到树上,作为单独的一个二级节点添加

(4) 添加最后一级节点,即 dp_company中的节点

SelectCoid(aChildNode,aChildquery.fieldbyname('Companytypeid').AsInteger); //添加相应的店名

(5) 最后形成的节点应该是:

所有区域
|
|---华南区
| |
| |___test1
| |
| |___广东省
| | |
| | |___test2
| | |
| | |___广州市
| | | |
| | | |___test5
| | |
| | |___深圳市
| | | |
| | | |___test3
| | | |
| | | |---福田区
| | | | |
| | | | |---test4
| | | | |
|__________________________test6 (由于它的companytypeid 在 dp_companytype中不存在,故将它加到一级子节点上)

当然程序有根据 isopen 将相应的节点差色(最后一级子节点),

之后就是数据操作,比如修改 dp_company 中 Companytypeid 的值,则将相应的记录移动别的节点上,为了使数据和界面分隔,将代码写在

datasource 的DataChange 事件中

...全文

ESP32内存优化实战：关闭WiFi/LWIP功能释放37KB IRAM的隐藏技巧本文针对ESP32开发中IRAM内存不足的难题，提供了一种通过关闭WiFi和LWIP协议栈的IRAM优化功能来释放宝贵内存空间的实战技巧。该方法最高可释放约37KB的IRAM，有效解决复杂项目（如WiFi+BLE+语音识别）的编译失败问题，并详细阐述了配置步骤、性能权衡与测试验证方法。阅读详情

mdejtod

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切换为时间正序

7年 2008-07-04

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太长了,有点乱,下午看!!!

kampan 2008-07-04

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楼主辛苦了！CSDN的排版确实很烦人，我还发帖问过呢！
这贴子先放一下，下午有空时仔细研读！

无条件为你 2008-07-04

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顶一下。

llj0209013 2008-07-04

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兄弟辛苦啦.

hnhb 2008-07-04

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友情UP

mdejtod 2008-07-03

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procedure TCompanyOpenB.AfterPost(IsNotExpand, NodeCancel: boolean;
Indexitem,nAreaid, nCompanytypeid,oCompanytypeid: integer; nCoid: string);
var i,j,k:integer;
begin
i:=0;j:=0;k:=0;
IsNotExpand:=false; //同时打开餐厅资料输入指引和该窗体时, dmdp_res.cdsdp_company 不能保存
k:=ReturnSelectIndex(dmdp_res.oSelectIndex); //在餐厅资料输入指引中,修改了餐厅资料时,要将树定位到该笔记录
if oCompanytypeid<> nCompanytypeid then
begin
if NodeCancel=false then //保存,该值在编辑之前设为真,若是取消保存,则不执行该过程
begin //修改餐厅类别而直接选中其它节点的情况下需要选回原来的节点
k:=Indexitem; //原来的编号
TreeView1.OnChange:=nil;
IsNotExpand:=true;
TreeView1.Items[k+1].Selected:=true;
NodeCancel:=true;
end;
For i:=0 to Index do
begin
if pCoid[i].Companytypeid=nCompanytypeid then
begin
pCoid[k].Companytypeid:=nCompanytypeid;
Temp:=pCoid[k];
TreeView1.Selected.MoveTo(pCoid[i].nNodeData,naAddChildFirst);
if k<i then //往后移
begin
for j:=k to i do
begin
pCoid[j]:=pCoid[j+1];
end;
pCoid[i]:=Temp;
end;
if k>i then //往前移
begin
for j:=k-1 downto i do
begin
pCoid[j+1]:=pCoid[j];
end;
pCoid[i+1]:=Temp;
end;
break;
end;
end;
end;
if IsNotExpand then
TreeView1.OnChange:=TreeView1Change;

mdejtod 2008-07-03

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procedure TCompanyOpenB.TreeView1Change(Sender: TObject; Node: TTreeNode);
var ParentNode,fCompanytypeid:string;
IsCheck:boolean;
Selectid:integer;
begin
inherited; //新增之后将按钮状态设置为FALSE,所以要将按钮设置回原来的状态
Selectid:=treeview1.Selected.AbsoluteIndex-1;
if Selectid=-1 then
exit;
if Insertrecord then
begin
CompanyOpenE.RefreshEnabled;
Insertrecord:=false;
end;
if (assigned(CompanyopenE)) and(CompanyOpenE.LJApplyUpdates.Enabled) then
begin
IsCheck:=dmdp_res.cdsdp_company.FieldByName('CheckFlag').AsBoolean;
if (IsCheck=false) and (Messagedlg('保存已修改的内容吗?',mtConfirmation,[mbYes,mbNo],0)=mryes) then
begin
dmdp_res.NodeCancel:=false; //保存
CompanyOpenE.LJApplyUpdatesClick(Sender);
end
else
begin
if IsCheck then
showmessage('已审核的数据不能修改');
dmdp_res.cdsDP_Company.CancelUpdates;
CompanyOpenE.RefreshEnabled;
end;
end;
if forminfo.DsBrow.DataSet<>dmdp_res.cdsDP_Company_open_b then //新增后,数据集为 cdsDP_Company
forminfo.DsBrow.DataSet:=dmdp_res.cdsDP_Company_open_b;
if DMDP_RES.cdsDP_Company_open_b.Filtered then //执行查找后,要将数据集过滤状态设为假
DMDP_RES.cdsDP_Company_open_b.filtered:=false;
if treeview1.Selected.Text='餐厅资料' then
exit;
with DMDP_RES.cdsDP_Company_open_b do
begin
Close;
CommandText:=
//注意,此处不用 selectid 是因为防止用户在修改数据后取消保存时(节点着色),其它地方选中了要操作的节点
'select * FROM DP_COMPANY where coid=:coid'; //故不能用用户当前选中的节点
Params.ParamByName('coid').Value:=pCoid[treeview1.Selected.AbsoluteIndex-1].Coid;
Open;
mIsOpen:=dmdp_res.cdsDP_Company_open_b.FieldByName('isopen').AsBoolean;
end;
forminfo.DsMain.DataSet:=dmdp_res.cdsDP_Company;
if forminfo.DsMain.DataSet.Filtered then
forminfo.DsMain.DataSet.Filtered:=false;
forminfo.SqlWhere:=' COID='''+trim(DMDP_RES.cdsDP_Company_open_b.fieldbyname('coId').asstring)+'''';
Query;
if pCoid[treeview1.Selected.AbsoluteIndex-1].isopen then
dmdp_res.cdsDP_Company.tag:=1
else
dmdp_res.cdsDP_Company.tag:=2;
end;

procedure TCompanyOpenB.cbSearchEnter(Sender: TObject);
var s:string;
begin
inherited;
if combobox1.ItemIndex=0 then
s:='select * from dp_company where isopen=1'
else if combobox1.ItemIndex=1 then
s:='select * from dp_company where isopen=0';
dmdp_res.cdsDP_Company_open_b.Close;
dmdp_res.cdsDP_Company_open_b.CommandText:=s;
dmdp_res.cdsDP_Company_open_b.Open;
end;

procedure TCompanyOpenB.cbSearchChange(Sender: TObject);
var s:string;
begin
if forminfo.DsBrow.DataSet<>dmdp_res.cdsDP_Company_open_b then //新增后,数据集为 cdsDP_Company
forminfo.DsBrow.DataSet:=dmdp_res.cdsDP_Company_open_b;
inherited;
forminfo.DsMain.DataSet:=dmdp_res.cdsDP_Company;
if combobox1.ItemIndex=0 then //已开业餐厅
begin
mIsOpen:=true;
s:=' and isopen=1 ';
end
else
begin
mIsOpen:=false;
s:=' and isopen=0 ';
end;
if IsFilter then
s:=s+' and Areaid='''+inttostr(Areaid)+'''';//不允许查询所属区域之外的资料
forminfo.SqlWhere:=' Coid='''+dmdp_res.cdsDP_Company_open_b.fieldbyname('Coid').AsString+''''+s;
query;
end;

procedure TCompanyOpenB.TreeView1CustomDrawItem(Sender: TCustomTreeView;
Node: TTreeNode; State: TCustomDrawState; var DefaultDraw: Boolean);
begin
if Node.Level=0 then
exit;
if PTCoid(Node.Data).Isopen=false then //强制转换
TreeView1.Canvas.Font.Color:=clred;
end;

procedure TCompanyOpenB.FormInfoAfterApplyUpdates(Sender: TObject);
var i,j:integer;
begin
i:=TreeView1.Selected.AbsoluteIndex-1;
For j:=i to Index do //删除数组元素
begin
pCoid[j]:=pCoid[j+1];
end;
TreeView1.Selected.Delete;
end;
procedure TCompanyOpenB.CancelPost(ColorCancel:boolean;nSelect,oSelect:integer;oIsopen:boolean;oAreaid:integer;oCoid:string);
var i:integer;
begin
if pCoid[nSelect].Isopen<>oIsopen then
begin
ColorCancel:=true;
TreeView1.OnChange:=nil; //取消保存时选中原来操作的节点再着色
TreeView1.Items[oSelect].Selected:=true;
DataSource1DataChange(Datasource1,dmdp_res.cdsDP_CompanyIsOpen);
end;
if pCoid[nSelect].Areaid<>oAreaid then //放弃保存修改的AREAID,将数组的值修改为原来的
begin
i:=nSelect;
TreeView1.OnChange:=nil;
TreeView1.Items[i+1].Selected:=true;
pCoid[i].Areaid:=oAreaid;
pCoid[i].Coid:=oCoid;
TreeView1.OnChange:=TreeView1Change;
end;
end;

procedure TCompanyOpenB.DataSource1DataChange(Sender: TObject;
Field: TField);
var isopen,nIsopen:boolean;
i:integer;
begin
if field=nil then
exit;
if assigned(CompanyopenB) and (Insertrecord=false) then
begin
if uppercase(Field.FieldName)='ISOPEN' then
begin
dmdp_res.IsNotExpand:=false;
i:=dmdp_res.oSelectIndex;
nIsopen:=dmdp_res.cdsdp_company.FieldByName('isopen').AsBoolean;
isopen:=pCoid[i].Isopen;
if isopen=nIsopen then
exit;
pCoid[i].Isopen:=nIsopen;
if pCoid[i].Isopen=false then
TreeView1.Canvas.Font.Color:=clred
else
TreeView1.Canvas.Font.Color:=clBlack;
if dmdp_res.ColorCancel then
begin
TreeView1.Items[dmdp_res.oSelectIndex+1].Selected:=true;
dmdp_res.ColorCancel:=false;
end
else
begin
TreeView1.OnChange:=nil;
TreeView1.Items[i+1].Selected:=true;
end;
if (dmdp_res.ColorCancel=false) or (dmdp_res.IsNotExpand=false) then
TreeView1.OnChange:=TreeView1Change;
TreeView1.SetFocus;
end;
if uppercase(Field.FieldName)='COID' then
begin
i:=ReturnSelectIndex(dmdp_res.oSelectIndex);
dmdp_res.nAreaid:=dmdp_res.cdsDP_Company.FieldByName('areaid').AsInteger;
dmdp_res.nCoid:=dmdp_res.cdsdp_company.FieldByName('coid').AsString;
if dmdp_res.oAreaid<>dmdp_res.nAreaid then
pCoid[i].Areaid:=dmdp_res.nAreaid;
if dmdp_res.oCoid<>dmdp_res.nCoid then
pCoid[i].Coid:=dmdp_res.nCoid;
end;
if uppercase(Field.FieldName)='ADDRCO' then
TreeView1.Selected.Text:=dmdp_res.cdsDP_Company.fieldbyname('addrco').AsString;
end;
end;

function TCompanyOpenB.ReturnSelectIndex(oSelect:integer): integer;
var SelectIndex:integer;
Default:boolean;
begin
if TreeView1.Selected.AbsoluteIndex=0 then
begin
SelectIndex:=oSelect;
TreeView1.OnChange:=nil;
Default:=true;
dmdp_res.IsNotExpand:=true;
TreeView1.Items[SelectIndex+1].Selected:=true; //要屏蔽树节点改变事件,注意树的绝对顺序和数组相差1,故要加上1
end
else
begin
SelectIndex:=TreeView1.Selected.AbsoluteIndex-1;
end;
Result:=SelectIndex;
if Default then
begin
Treeview1.OnChange:=TreeView1Change;
Default:=false;
end;
end;

end;

mdejtod 2008-07-03

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procedure TCompanyOpenB.AddParentNode; //添加父节点
var aParentNode:TTreeNode;
aParentquery:TSQLquery;
idx:integer;
mFirst:boolean;
begin
mFirst:=true;
aParentquery:=TSQLquery.Create(nil);
aParentquery.SQLConnection:=DMdp_mid.SQLConnection1;
with dmdp_sys.cdsCommon do
begin
if IsFilter then //过滤完再次查询
begin
for idx:=0 to Mylist.Count-1 do
begin
mSql:=mSql+Mylist.Strings[idx];
end;

Close;
CommandText:= ' select * from dp_companytype where (parentid not in(select companytypeid from dp_companytype)'+
' or parentid='''' or parentid is null or parentid=0 ) and '+mSql+' order by CompanyTypeID ';
open;
end
else
begin
Close;
CommandText:=' select * from dp_companytype where parentid not in(select companytypeid from dp_companytype) or parentid='''''+
' or parentid is null or parentid=0 order by CompanyTypeID';
Open;
end;
for idx:=0 to RecordCount-1 do
begin
if (Index<>0) or (mFirst=false) then
Inc(Index);
New(pCoid[Index]);
aParentNode:=treeview1.Items.AddChild(node,dmdp_sys.cdsCommon.fieldbyname('name').AsString);
pCoid[Index].Coid:=''; // 没有COID,则存空值
pCoid[Index].Companytypeid:=dmdp_sys.cdsCommon.fieldbyname('Companytypeid').AsInteger;
pCoid[Index].nNodeData:=aParentNode;
pCoid[Index].Areaid:=null;
pCoid[Index].Isopen:=true;
aParentNode.Data:=pCoid[Index];
AddChildNode(aParentNode,dmdp_sys.cdsCommon.fieldbyname('Companytypeid').AsInteger,true); //最后一个参数为添加顶节点标志
Next;
mFirst:=false;
end;
end;
if IsFilter then //添加所属区域内的餐厅
mSql:=' select addrco,isopen,coid,companytypeid ,Areaid from dp_company where (companytypeid is null '+
' or companytypeid=0 or companytypeid='''') and Areaid='''+inttostr(Areaid)+''' order by companytypeid'
else
mSql:=' select addrco,isopen,coid,companytypeid ,Areaid from dp_company where companytypeid is null '+
' or companytypeid=0 or companytypeid='''' order by companytypeid';
aParentquery.Close; //添加没有设 companytypeid 的餐厅节点
aParentquery.SQL.Clear;
aParentquery.SQL.Text:=mSql;
aParentquery.Open;
AddCoidnode(node,aParentquery);
aParentquery.Free;
end;

procedure TCompanyOpenB.SelectCoid(ChildCoid: TTreeNode;nCompanytypeid:integer); //添加餐厅节点
var idx:integer;
AddrNode:TTreeNode;
Coidquery:TSQLquery;
str:string;
begin
Coidquery:=TSQLquery.Create(nil);
Coidquery.SQLConnection:=DMdp_mid.SQLConnection1;
with Coidquery do
begin
if IsFilter then
str:=' select addrco,isopen,coid,companytypeid ,Areaid '+
' from dp_company where companytypeid= '+
' '''+inttostr(nCompanytypeid)+''' and areaid='''+inttostr(Areaid)+''' order by coid'
else
str:=' select addrco,isopen,coid,companytypeid ,Areaid '+
' from dp_company where companytypeid= '+
' '''+inttostr(nCompanytypeid)+''' order by coid';
Close;
Sql.Text:=str;
open;
AddCoidnode(ChildCoid,Coidquery); //添加餐厅节点
end;
Coidquery.Free;
end; //添加餐厅节点
procedure TCompanyOpenB.AddCoidnode(CoidNode:TTreeNode;Coidchild:TSQLquery);
var idx:integer;
AddrNode:TTreeNode;
begin
For idx:=0 to Coidchild.RecordCount-1 do
begin
Inc(Index);
New(pCoid[Index]);
AddrNode:=treeview1.Items.AddChild(CoidNode,Coidchild.fieldbyname('addrco').AsString);
pCoid[Index].Coid:=Coidchild.fieldbyname('coid').AsString;
pCoid[Index].Areaid:=Coidchild.fieldbyname('Areaid').AsInteger;
pCoid[Index].nNodeData:=AddrNode;
pCoid[Index].Companytypeid:=Coidchild.fieldbyname('Companytypeid').AsInteger;
if Coidchild.FieldByName('Isopen').AsBoolean then
pCoid[Index].Isopen:=true
else
pCoid[Index].Isopen:=false;
AddrNode.Data:=pCoid[Index];
Coidchild.next;
end;
end;
procedure TCompanyOpenB.AddChildNode(ChildNode: TTreeNode;nCompanytypeid:Integer;Isparentid:boolean); //添加二级子节点
var aChildNode:TTreeNode;
aChildquery,aquery:TSQLquery;
idx:integer;
Hasadd:boolean;
str,mstr:string;
begin
aquery:=TSQLquery.Create(nil);
aquery.SQLConnection:=DMdp_mid.SQLConnection1;
aChildquery:=TSQLquery.Create(nil);
aChildquery.SQLConnection:=DMdp_mid.SQLConnection1;
with aChildquery do
begin
if IsFilter then
begin
str:=' select * from dp_companytype where '+mSql+' and parentid='''+inttostr(nCompanytypeid)+''' order by companytypeid';
mstr:='select companytypeid from dp_company where companytypeid='''+inttostr(nCompanytypeid)+''' and Areaid='''+inttostr(Areaid)+''' order by companytypeid';
end
else
begin
str:=' select * from dp_companytype where ParentID='''+inttostr(nCompanytypeid)+''' order by CompanyTypeID';
mstr:=' select companytypeid from dp_company where companytypeid='''+inttostr(nCompanytypeid)+''' order by companytypeid';
end;
close;
SQL.Clear;
SQL.Text:= str;
open;
aquery.Close;
aquery.SQL.Text:=mstr;
aquery.Open;
if (aquery.RecordCount<>0) and Isparentid then //存在餐厅节点时和子节点时,先添加餐厅节点
begin
SelectCoid(ChildNode,nCompanytypeid); //加判断,防止重复添加两次(该节点只存在餐厅节点时)
Hasadd:=true;
end;
if (RecordCount=0) and Isparentid and (Hasadd=false) then //没有二级节点只有餐厅节点时,直接添加餐厅资料
begin //区分是否为顶级节点
SelectCoid(ChildNode,nCompanytypeid);
end
else
begin
Hasbillnode:=true;
for idx:=0 to RecordCount-1 do
begin
Inc(Index);
New(pCoid[Index]);
aChildNode:=treeview1.Items.AddChild(ChildNode,aChildquery.fieldbyname('name').asstring);
pCoid[Index].Coid:=''; //没有COID,存空值
pCoid[Index].Areaid:=null;
pCoid[Index].Isopen:=true;
pCoid[Index].nNodeData:=aChildNode;
pCoid[Index].Companytypeid:=aChildquery.fieldbyname('Companytypeid').AsInteger;
aChildNode.Data:=pCoid[Index];
AddChildNode(aChildNode,aChildquery.fieldbyname('Companytypeid').AsInteger,false);
SelectCoid(aChildNode,aChildquery.fieldbyname('Companytypeid').AsInteger); //添加相应的店名
next;
end;
end;
end;
aChildquery.Free;
aquery.Free;
end;

mdejtod 2008-07-03

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这破CSDN.我排了好久才排好,一发又乱了,.靠..啥也不说了,贴代码
unit CompanyOpenBf;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, BasBrowFrmF, DB, LJDataSource, Menus, ActnList, LJReportEh, SqlExpr,
AppEvnts, LJSysStyle, LJFormInfo, StdCtrls, ComCtrls, Grids, DBGridEh,
ExtCtrls, Buttons, LJDBNav,dbclient, DBGrids,UntCommon, Mask, DBCtrls,
LJDBEditx, ADODB;

type
TCoid=record //记录用来存放 coid 编号
Coid:string;
Isopen:boolean;
Companytypeid:integer;
Areaid:Variant;
nNodeData:TTreeNode;
end;
PTCoid=^TCoid; //结构体指针
TCompanyOpenB = class(TBasBrowFrm)
TreeView1: TTreeView;
DataSource1: TDataSource;
procedure FormShow(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
procedure dsBrow_GroupLJDataChange(Sender: TObject; Field: TField);
procedure FormActivate(Sender: TObject);
procedure SBCheckClick(Sender: TObject);
procedure TreeView1Change(Sender: TObject; Node: TTreeNode);
procedure cbSearchEnter(Sender: TObject);
procedure cbSearchChange(Sender: TObject);
procedure TreeView1CustomDrawItem(Sender: TCustomTreeView;
Node: TTreeNode; State: TCustomDrawState; var DefaultDraw: Boolean);
procedure FormInfoAfterApplyUpdates(Sender: TObject);
procedure DataSource1DataChange(Sender: TObject; Field: TField);
private
{ Private declarations }
public
node:TTreeNode;
insertedstate:boolean; // 检查自动编号重复
Insertrecord:boolean; //新增标志
Hasbillnode:boolean;
IsFilter:boolean;
Areaid,Companytypeid,Parentid:integer;
MyList:TStringList;
mSql:string;
procedure SelectCoid(ChildCoid:TTreeNode;nCompanytypeid:integer); //取得餐厅信息
procedure AddParentNode; //添加顶级节点
procedure AddChildNode(ChildNode:TTreeNode;nCompanytypeid:integer;Isparentid:boolean);//添加二级节点
procedure AddCoidnode(CoidNode:TTreeNode;Coidchild:TSQLquery); //添加餐厅节点
//取消保存
procedure CancelPost(ColorCancel:boolean;nSelect,oSelect:integer;oIsopen:boolean;oAreaid:integer;oCoid:string);{ Public declarations }
//返回当前要操作的节点
function ReturnSelectIndex(oSelect:integer):integer;
//保存之后改变数组信息和移动节点
procedure AfterPost(IsNotExpand,NodeCancel:boolean;Indexitem,nAreaid,nCompanytypeid,oCompanytypeid:integer;nCoid:string);
end; //注意,后面四个过程中所传递参数与 dmdp_res模块中定义的参数名称一致,以便以区分
var
CompanyOpenB: TCompanyOpenB;
Index:longint; //数组下标
pCoid:array [0..10000] of PTCoid; //
Temp:PTCoid; //移到节点时的中间变量
mForm:TForm;
mTForm:TComponentClass;
procedure SetAreaRight;
implementation

uses DMDP_RESf, DMDP_SYSf, CompanyOpenEf, commLib, DMDP_BASf,DMdp_midf,BasCompanyTypeBF,LoginDPf,
ResearchHouseEf, ResearchWorkEf, ResearchPasserEf, BusType,BasEditSF,BasEditFrmF;

{$R *.dfm}

procedure TCompanyOpenB.FormShow(Sender: TObject);
var s:string;
i:integer;
begin
inherited;
//lj 2003-07-25 add
//增下句的目的: 由于为了提升速度,浏览窗口与编辑窗口使用了不同的数据集,
// 使得权限控制只控制到了浏览数据集,为此，增加以下语句
// 设置编辑窗口数据集的权限
forminfo.dsmain:=dmdp_res.dsDP_Company;
SetRight(RightText);
forminfo.dsmain:=dsbrow;
//------------------------
if assigned(TForm(CompanyOpenE)) then //把窗体放在panel上
begin
mForm:=nil;
end;
application.CreateForm(TCompanyOpenE,TForm(CompanyOpenE));
CompanyOpenE.Align:=alClient;
CompanyOpenE.WindowState:=wsMaximized;
CompanyOpenE.Position:=poDesigned;
TForm(CompanyOpenE).Dock(Panel1,Panel1.ClientRect);
TForm(CompanyOpenE).Show;
CompanyOpenE.Color:=clBtnFace;

// CompanyOpenE.LJApplyUpdates.Top:=327;
//-----------------------
Index:=0;
DMDP_SYS.cdsOperator.Filter:=' operid='''+OperID+'''';
if dmdp_sys.cdsOperator.FieldByName('dp_allarearight').AsBoolean then //为真，无需作权限判断
begin
dmdp_sys.cdsOperator.Filtered:=false;
end
else
begin
IsFilter:=true;
Mylist:=TStringList.create;
Mylist.clear;
dmdp_sys.cdsOperator.Filtered:=true;
Areaid:=dmdp_sys.cdsOperator.fieldbyname('DP_Areaid').AsInteger;
dmdp_sys.cdsCommon.Close; //查询 companytypeid
dmdp_sys.cdsCommon.CommandText:='select DIStinct companytypeid from dp_company where areaid='''+inttostr(Areaid)+'''';
dmdp_sys.cdsCommon.Open;
Mylist.Add(' ( ');
For i:=0 to dmdp_sys.cdscommon.recordcount-1 do
begin
Companytypeid:=dmdp_sys.cdscommon.fieldbyname('Companytypeid').asinteger;
dmdp_bas.cdsDP_CompanyType.Filter:=' Companytypeid='''+inttostr(Companytypeid)+'''';
dmdp_bas.cdsDP_CompanyType.Filtered:=true;
Parentid:=dmdp_bas.cdsdp_companytype.fieldbyname('parentid').asinteger;
Mylist.add(' (Parentid='''+inttostr(Companytypeid)+''' or companytypeid='''+inttostr(Parentid)+''') or Companytypeid='''+inttostr(Companytypeid)+''' ');
if (Mylist.text<>'') and (i<>dmdp_sys.cdscommon.recordcount-1) then
Mylist.add(' or ');
if s<>'' then
s:=s+' or';
s:=s+' Companytypeid='''+inttostr(Companytypeid)+''' or companytypeid='''+inttostr(Parentid)+'''';
dmdp_bas.cdsDP_CompanyType.Filtered:=false;
dmdp_sys.cdscommon.next;
end;
Mylist.Add(' ) ');
s:=' and ('+s+')';
Mylist.Add(s);
Companytypeid:=dmdp_sys.cdsCommon.fieldbyname('Companytypeid').AsInteger;
Parentid:=dmdp_bas.cdsDP_CompanyType.fieldbyname('parentid').AsInteger;
dmdp_bas.cdsDP_CompanyType.Filtered:=false;
end;
treeview1.SetFocus;
node:=treeview1.Selected;
TreeView1.Items.BeginUpdate;
AddParentNode;
TreeView1.Items.EndUpdate;
dmdp_sys.cdsOperator.Filter:='';
if dmdp_sys.cdsOperator.Filtered then
dmdp_sys.cdsOperator.Filtered:=false;
if dmdp_bas.cdsDP_CompanyType.Filtered then
dmdp_bas.cdsDP_CompanyType.Filtered:=false;
end;

一个树使用的实例,仅供参考..

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