Delphi develops and modifies and submits Web form content

The program code mainly uses the WebBrowser control to modify and extract the webpage form content. The FillSelectForm function is used to modify the content of the Selection box. The following is the implementation function code:

Function TForm1.FillSelectForm (WebBrowser: TWebBrowser; FieldName: string; Value: integer): Boolean;

 

 

 

Var

 

 

 

I, j: Integer;

 

 

 

FormItem: Variant;

 

 

 

Hform: IHTMLFormelement;

 

 

 

Hdoc: ihtmldocument2;

 

 

 

Hall: ihtmlelementcollection;

 

 

 

Hinput: IHTMLinputelement;

 

 

 

Hselect: IHTMLSelectElement;

 

 

 

Hlen, tmploop: integer;

 

 

 

Vk: oleVariant;

 

 

 

Dispatch: IDispatch;

 

 

 

Begin

 

 

 

Result: = False;

 

 

 

If WebBrowser. OleObject. Document. all. tags ('form'). Length = 0 then

 

 

 

Begin

 

 

 

Exit;

 

 

 

End;

 

 

 

 

 

 

If Assigned (WebBrowser) then

 

 

 

Begin

 

 

 

Hdoc: Export webbrowser.doc ument as ihtmldocument2;

 

 

 

Hall: = hdoc. get_all;

 

 

 

Hlen: = hall. get_length;

 

 

 

For tmploop: = 0 to hlen-1 do

 

 

 

Begin

 

 

 

Vk: = tmploop;

 

 

 

Dispatch: = hall. item (vk, 0 );

 

 

 

If succeeded (Dispatch. QueryInterface (IHTMLSelectElement, Hselect) then

 

 

 

Begin

 

 

 

If (lowercase (Hselect. name) = 'xingzuo') then

 

 

 

Begin

 

 

 

Hselect. selectedIndex: = Value;

 

 

 

Result: = True;

 

 

 

End;

 

 

 

End;

 

 

 

End;

 

 

 

End;

 

 

 

End;

 

 

 

 

The SubmitForm function implements form submission. The following is the code for implementing the function program:

 

Function TForm1.SubmitForm (WebBrowser: TWebBrowser;

 

 

 

FormName: string): Boolean;

 

 

 

Var

 

 

 

I, j, k: Integer;

 

 

 

FormItem: Variant;

 

 

 

Hform: IHTMLFormelement;

 

 

 

Hdoc: ihtmldocument2;

 

 

 

Hall: ihtmlelementcollection;

 

 

 

Hinput: IHTMLinputelement;

 

 

 

Hselect: IHTMLSelectElement;

 

 

 

Hlen, tmploop: integer;

 

 

 

Vk: oleVariant;

 

 

 

Dispatch: IDispatch;

 

 

 

Iw: IWebbrowser2;

 

 

 

Begin

 

 

 

Result: = False;

 

 

 

K: = 0;

 

 

 

If WebBrowser. OleObject. Document. all. tags ('form'). Length = 0 then

 

 

 

Begin

 

 

 

Exit;

 

 

 

End;

 

 

 

If Assigned (WebBrowser) then

Begin

 

 

 

Hdoc: Export webbrowser.doc ument as ihtmldocument2;

 

 

 

Hall: = hdoc. get_all;

 

 

 

Hlen: = hall. get_length;

 

 

 

For tmploop: = 0 to hlen-1 do

 

 

 

Begin

 

 

 

Vk: = tmploop;

 

 

 

Dispatch: = hall. item (vk, 0 );

 

 

 

If succeeded (Dispatch. QueryInterface (IHTMLFormelement, hform) and (lowercase (hform. name) = 'xingzuoday') then

 

 

 

Begin

 

 

 

Hform.tar get: = '';

 

 

 

Hform. submit;

 

 

 

Result: = True;

 

 

 

Break;

 

 

 

End;

 

 

 

End;

 

 

 

End;

 

 

 

End;

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The SubmitForm function implements form submission. The following is the code for implementing the function program: