DIV classes mit getElementByID auslesen

[Volker Z.]

Hallo,

Zitat:

Ich möchte pro div-Block die 4 fett markierten Informationen auslesen [...] Wie spreche ich denn eine div class richtig an ?

Das könnst z. B. Du so machen (das Exception Handling musst Du halt noch sauber programmieren):

Delphi-Quellcode:

uses
  MSHTML;

function DOMNodeClassNameIs (const Node : IHTMLDOMNode; const Name : string) : Boolean;
var
  e : IHTMLElement;
begin
  e := Node as IHTMLElement;
  if not Assigned (e) then
    Exception.Create ('Fehlermeldung');

  Result := e.className = Name
end;

function DOMNodeIsTextNode (const Node : IHTMLDOMNode) : Boolean;
begin
  if Assigned (Node) then
    Result := Node.nodeType = 3
  else
    Result := False
end;

function DOMNodeTagNameIs (const Node : IHTMLDOMNode; const Name : string) : Boolean;
begin
  if Assigned (Node) then
    Result := LowerCase (Node.nodeName) = LowerCase (Name)
  else
    Result := False
end;

function FindSpanByClassName (Node : IHTMLDOMNode; const Name : string) : IHTMLDOMNode;
begin
  Result := nil;
  while Assigned (Node) do
    begin
      if (LowerCase (Node.nodeName) = 'span') and DOMNodeClassNameIs (Node, Name) then
        begin
          Result := Node.firstChild;
          Break
        end;

      Node := Node.nextSibling
    end
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  d : IHTMLDocument3;
  c : IHTMLElementCollection;
  i : Integer;
  n : IHTMLDOMNode;
  s : string;

  procedure AddNodeValue (const Node : IHTMLDOMNode; var S : string);
  begin
    if not Assigned (Node) then
      Exception.Create ('Fehlermeldung');

    if S <> '' then
      S := S + ' ';

    S := S + Node.nodeValue
  end;

  procedure AddFFTHeader (const Node : IHTMLDOMNode; var S : string);
  var
    n : IHTMLDOMNode;

    procedure AddFFTDateTime (var Node : IHTMLDOMNode; var S : string);
    begin
      if not DOMNodeIsTextNode (Node) then
        Exception.Create ('Fehlermeldung');

      AddNodeValue (Node, S);
      Node := Node.nextSibling
    end;

    procedure AddFFTSpanByClassName (var Node : IHTMLDOMNode; var S : string; const Name : string);
    var
      n : IHTMLDOMNode;
    begin
      n := FindSpanByClassName (Node, Name);
      if not Assigned (n) then
        Exception.Create ('Fehlermeldung');

      AddNodeValue (n, S);
      Node := Node.nextSibling
    end;

  begin
    n := Node.firstChild;
    AddFFTDateTime (n, S);
    AddFFTSpanByClassName (n, S, 'FFT_header_for_name');
    AddFFTSpanByClassName (n, S, 'FFT_header_group')
  end;

  procedure AddFFTText (Node : IHTMLDOMNode; var S : string);
  begin
    if not (DOMNodeTagNameIs (Node, 'div') and DOMNodeClassNameIs (Node, 'fftText')) then
      Exception.Create ('Fehlermeldung');

    Node := Node.firstChild;
    if not DOMNodeTagNameIs (Node, 'pre') then
      Exception.Create ('Fehlermeldung');

    Node := Node.firstChild;
    if DOMNodeIsTextNode (Node) then
      AddNodeValue (Node, S)
  end;

begin
  d := WebBrowser1.Document as IHTMLDocument3;
  if not Assigned (d) then
    Exit;

  c := d.getElementsByTagName ('div');
  for i := 0 to c.length - 1 do
    begin
      n := c.item (i, EmptyParam) as IHTMLDOMNode;
      if not Assigned (n) then
        Exception.Create ('Fehlermeldung');

      if DOMNodeClassNameIs (n, 'FFT_header') then
        begin
          s := '';
          AddFFTHeader (n, s);
          AddFFTText (n.nextSibling, s);

          Memo1.Lines.Add (s)
        end
    end
end;

Gruß