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Help with _newenum

Posted on 2001-06-07
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Last Modified: 2007-11-27
I am trying to enum the virtual webservers in the iiswebservice object. Basically (for each website in webservice) in VB. I am trying to do this in Delphi 5.

WebSite := CreateOleObject('IISNamespace');
        WebSite := WebSite.GetObject('IIsWebService', 'localhost/w3svc');
        Enum := website._newenumm as ienumvariant;

I can not get this to work. I was hoping someone here could shed some light.

Thanks in advance.
John Lindsly
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Comment
Question by:jtl12
  • 2
4 Comments
 
LVL 6

Expert Comment

by:edey
ID: 6164553
I found this article: http://www.techvanguards.com/com/tutorials/tips.asp#Know%20how%20to%20implement%20clients%20that%20iterate%20IEnumVARIANT-based%20collections

Here's a snippet:

uses ComLib;

var
  Foo : IFoo;
  Item : olevariant;
  Enum : TEnumVariant;
begin
  Foo := CreateOleObject ('FooServer.Foo') as IFoo;  //or CoFoo.Create
  Enum := TEnumVariant.Create (Foo.Items);
  while (Enum.ForEach (Item)) do
    DoSomething (Item);
  Enum.Free;
end;

Note, I'm not sure what is contained in ComLib, but it's available (freely) from the authors website (see the above link).

GL
Mike
0
 

Author Comment

by:jtl12
ID: 6164572
Yea I have this code snippet. However iiswebservice does not appear to have an items prop. So I do not know how to apply this to my case.

Thanks for your help though
0
 
LVL 6

Expert Comment

by:edey
ID: 6164930
Hi, i really wish I could give more specific help, but i don't have IIS. At any rate I did find the following from a usenet article:

procedure TMainForm.btnListClick(Sender: TObject);
var
  ADsContainer: IADsContainer;
  EnumVariant : IEnumVariant;
  Child       : OleVariant;
  Fetched     : LongWord;
  ADSIPath    : WideString;
begin
  Lst.Clear;

  ADSIPath := 'IIS://localhost/W3SVC/1/ROOT';
  OleCheck(ADsGetObject(PWideChar(ADSIPath), IADsContainer, ADsContainer));

  // A Delphi For Each loop!
  EnumVariant := ADsContainer._NewEnum as IEnumVariant;
  EnumVariant.Reset;
  Fetched := 0;
  while Succeeded(EnumVariant.Next(1, Child, Fetched)) and (Fetched > 0) do
    Lst.Items.Add(Child.Name);
end;


perhaps it may shed some light on the issue.

GL
Mike
0
 
LVL 26

Accepted Solution

by:
Russell Libby earned 400 total points
ID: 6165120

I did not forget you from yesterday, I just didn't have the free until now.

So....

const
  IID_IADSContainer:   TGUID =  '{001677D0-FD16-11CE-ABC4-02608C9E7553}';

type
  IADSContainer  =  interface(IDispatch)
     ['{001677D0-FD16-11CE-ABC4-02608C9E7553}']
     function    get_Count(out plCount: Longint): HResult; stdcall;
     function    get__NewEnum(out ppEnumerator: IEnumVariant): HResult; stdcall;
     function    get_Filter(const pvFilter: Variant): HResult; stdcall;
     function    put_Filter(out pvFilter: Variant): HResult; stdcall;
     function    get_Hints(const pvHints: Variant): HResult; stdcall;
     function    put_Hints(out pvHints: Variant): HResult; stdcall;
     function    GetObject(const bstrClass, bstrRelativeName: WideString; out ppNamedObject: IDispatch): HResult; stdcall;
     function    Create(const bstrClass, bstrRelativeName: WideString; out ppNamedObject: IDispatch): HResult; stdcall;
     function    Delete(const bstrClass, bstrRelativeName: WideString): HResult; stdcall;
     function    CopyHere(const bstrSource, bstrNew: WideString; out ppNamedObject: IDispatch): HResult; stdcall;
     function    MoveHere(const bstrSource, bstrNew: WideString; out ppNamedObject: IDispatch): HResult; stdcall;
  end;

var
  Form1: TForm1;

implementation
{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var  oNameSpace: OleVariant;
     piac:       IADSContainer;
     oService:   OleVariant;
     oSite:      OleVariant;
     oServer:    OleVariant;
     oBindings:  OleVariant;
     oComputer:  OleVariant;
     pev:        IEnumVariant;
     s:          String;
begin

  CoInitialize(nil);

  oNameSpace:=CreateOleObject('IISNamespace');
  oService:=oNameSpace.GetObject('IIsWebService', 'localhost/w3svc');
  IDispatch(oService).QueryInterface(IADSContainer, piac);
  if piac.get__NewEnum(pev) = S_OK then
  begin
     pev.Reset;
     while pev.Next(1, oServer, nil) = S_OK do
     begin
        s:=oServer.Class;
        if CompareText(s, 'IIsWebServer') = 0 then
        begin
           // Check the server comment to the name
           // your looking for, like "Default Web Site"
           ShowMessage(oServer.ServerComment);
        end;
     end;
  end;

end;
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