TEcoForumServices 类(繁体版4月15日博客)

TEcoForumServices 类

 

有位大陆的读者写信跟我说他在《Delphi MDA/DDA程序设计——使用ECO》一书的CD中找不到TEcoForumServices 类的源代码，虽然我记得我已经把整本书下的Source打包到CD中了，而且TEcoForumServices 是一个很简易的类．Anyway，如果有人也需要这个类的源代码，下面就是它完整的列表。

unit EcoForumWrapperServices;

interface

uses System.Web, ECOForumWebAppDemo1EcoSpace, PECOForumUnit,
     Borland.Eco.Handles, Borland.Eco.ObjectRepresentation,
     System.Web.Security, Borland.Eco.Services;

type
  TEcoForumServices = class
  private
    { Private Declarations }
  public
    class function CreateMemeber(mySpace :  Borland.Eco.Handles.EcoSpace) : ForumMember;
    class function getForumSite(objl : IObjectList) : ForumSite;
    class function MemberLogin(mySpace :  Borland.Eco.Handles.EcoSpace; const UserId : string; const sPassword : string) : ForumMember;
  end;

implementation

{ TEcoForumServices }

class function TEcoForumServices.CreateMemeber(mySpace :  Borland.Eco.Handles.EcoSpace): ForumMember;
begin
  Result := ForumMember.Create(mySpace);
end;

class function TEcoForumServices.getForumSite(objl: IObjectList): ForumSite;
var
  obj : System.Object;
begin
  Result := HttpContext.Current.Session['ForumSite'] as ForumSite;

  if (Result = nil) then
  begin
    obj := objl[0].AsObject;
    Result := obj as ForumSite;
    HttpContext.Current.Session['ForumSite'] := Result;
  end;
end;

class function TEcoForumServices.MemberLogin(mySpace :  Borland.Eco.Handles.EcoSpace;
  const UserId, sPassword: string): ForumMember;
const
  selectUser = 'ForumMember.allInstances->select( M | (M.Name = ''{0}'')  and  (M.Password = ''{1}'') )->First';
var
  enPW : string;
  userOCL : string;
  OCLResult : IElement;
  oclService : IOclService;
begin
  enPW := FormsAuthentication.HashPasswordForStoringInConfigFile(sPassword,'md5');
  oclService := mySpace.GetEcoService(typeof(IOclService)) as IOclService;
  userOCL := System.String.Format(selectUser,UserId,enPW);
  OCLResult := oclService.Evaluate(userOCL);
  Result := nil;
  if (OCLResult.GetAsCollection.Count <> 0) then
    Result := OCLResult.GetAsCollection.Item[0].AsObject as ForumMember;
  HttpContext.Current.Session['ForumMember'] := Result;
end;

end.