Delphi实现软件中登录用户的操作权限

 数据库结构：包括两张表BaseData和UserRightData，BaseData中是一张基本表，里面不区分用户，UserRightData是用户权限表，结构和BaseData一样，只是多了用户字段，增加用户时，就是从BaseData表中复制数据到UserRightData中，并标识用户ID。

字段说明：

FucCode:该字段与控件tag对应

FucName:功能名称

IsSel:是否有权限的标志

IsFuc:标识该项是否是可以执行的功能

FucPID:父节点ID，用来生成树形结构时用

权限管理单元：UserRightCenter

unit UserRightCenter;

interface

uses
  Windows, Messages, SysUtils, Classes, Forms, Dialogs,ADODB;

type
  TUserRight = class
    private
      FConnection : TADOConnection;
      FData: TADOQuery;
      FUserID: Integer;
    public
      constructor Create(AConnection:TADOConnection);overload;

      //根据用户id创建对应的权限列表
      function CreateRightListByUserID(uid:Integer):Boolean;
      //根据用户id取得对应的权限列表
      function GetRightListByUserID(uid:Integer):Boolean;
      //根据用户id删除对应的权限列表
      function DeleteRightListByUserID(uid:Integer):Boolean;
      //根据记录id设置某个功能是否可用,funid:记录id，uid:用户ID，issel:是否可用
      procedure SetFunEnable(funid,uid,issel:Integer);
      //判断某个功能是否可用
      function IsRightEnable(uid:Integer;fuccode:string):Boolean;

      procedure ShowUserRigthView(uid:Integer);

      property Connection: TADOConnection read FConnection;
      property Data: TADOQuery read FData;
      property UserID: Integer read FUserID write FUserID;
  end;

implementation
uses
  UserRightView;

{ TUserRight }

constructor TUserRight.Create(AConnection: TADOConnection);
begin
  FConnection := AConnection;
  FData := TADOQuery.Create(nil);
  FData.Connection := FConnection;
end;

function TUserRight.CreateRightListByUserID(uid: Integer): Boolean;
begin
  Result := False;
  DeleteRightListByUserID(uid);
  FData.Close;
  FData.SQL.Text := 'insert into UserRightData(fucid,fucpid,fuccode,fucname,IsFuc,IsSel,userid) '+
                    'select fucid,fucpid,fuccode,fucname,IsFuc,IsSel,'+IntToStr(uid)+' from BaseData';
  FData.ExecSQL;
  Result := True;
end;

function TUserRight.DeleteRightListByUserID(uid: Integer): Boolean;
begin
  Result := False;
  FData.Close;
  FData.SQL.Text := 'delete from UserRightData where userid='+IntToStr(uid);
  FData.ExecSQL;
  Result := True;
end;

function TUserRight.GetRightListByUserID(uid: Integer): Boolean;
begin
  FData.Close;
  FData.SQL.Text := 'select * from UserRightData where UserID='+IntToStr(uid);
  FData.Open;
end;

function TUserRight.IsRightEnable(uid:Integer;fuccode: string): Boolean;
begin
  FData.Close;
  FData.SQL.Text := 'select * from UserRightData where userid='+IntToStr(uid)+
                    ' and fuccode='+fuccode;
  FData.Open;
  if (FData.IsEmpty) or (FData.FieldByName('IsSel').AsInteger = 0) then
    Result := False
  else
    Result := True;
end;

procedure TUserRight.SetFunEnable(funid,uid,issel: Integer);
begin
  FData.Close;
  FData.SQL.Text := 'update UserRightData set IsSel='+IntToStr(issel)+
                    ' where UserID='+IntToStr(uid)+' and FucID='+IntToStr(funid);
  FData.ExecSQL;
end;

//这是现实权限管理界面的，也就是在上面设置用户权限，这个大家可以根据自己的需要用不同的方式去展现
procedure TUserRight.ShowUserRigthView(uid: Integer);
var
  frm: TfrmUserRightView;
begin
  frm := TfrmUserRightView.Create(nil);
  try
    frm.Caption := '用户权限列表';
    frm.SetUserRight(Self);
    Self.GetRightListByUserID(uid);
    frm.ShowModal;
  finally
    FreeAndNil(frm);
  end;
end;

end.

unit Main;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs,UserRightCenter, StdCtrls, DB, ADODB;

type
  TfrmMain = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Edit1: TEdit;
    Label1: TLabel;
    ADOConnection1: TADOConnection;
    Button3: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
    FUserRight : TUserRight;
  public
    { Public declarations }
  end;

var
  frmMain: TfrmMain;

implementation

{$R *.dfm}

//现实用户权限列表
procedure TfrmMain.Button1Click(Sender: TObject);
begin
  FUserRight.UserID := 1;
  FUserRight.ShowUserRigthView(1);
end;

procedure TfrmMain.FormCreate(Sender: TObject);
begin
  //ADOConnection1是你的数据库连接
  ADOConnection1.Open;
  FUserRight := TUserRight.Create(ADOConnection1);
end;

//创建用户权限列表
procedure TfrmMain.Button2Click(Sender: TObject);
begin
  FUserRight.CreateRightListByUserID(StrToInt(Edit1.Text));
end;

//测试，查看权限，Button3的tag设置为10100003
procedure TfrmMain.Button3Click(Sender: TObject);
begin
  if FUserRight.IsRightEnable(1,IntToStr(TButton(Sender).Tag)) then
    ShowMessage('可以使用')
  else
    ShowMessage('你没有使用权限')
end;

end.