0
我使用這個代碼TEventObject與IE瀏覽器的標籤頁爲致命錯誤
try
document := (pDisp as IWebbrowser2).Document AS IHTMLDocument2;
Body := Document.body;
Links := Document.links;
for i := 0 to (Links.length-1) do
begin
tmp := (Links.item(i, 0) as IHTMLElement);
tmp.onclick := TEventObject.Create(MyProcedure) as IDispatch; // THIS LINE
end;
except
on E : Exception do
ShowMessage(E.ClassName+' error raised, with message : '+E.Message);
end;
在IE網頁瀏覽器的DocumentComplete事件,它工作正常,但是當我打開一個新標籤,我得到一個Microsoft Internet Explorer遇到一個問題,需要關閉」的錯誤。
標記在上面的代碼//這行的行是導致它的人(我評論它,它並沒有顯示錯誤)。
以下是其餘代碼:
TEventObject = class(TInterfacedObject, IDispatch)
private
FOnEvent: TProcedure;
protected
function GetTypeInfoCount(out Count: Integer): HResult; stdcall;
function GetTypeInfo(Index, LocaleID: Integer; out TypeInfo): HResult; stdcall;
function GetIDsOfNames(const IID: TGUID; Names: Pointer;
NameCount, LocaleID: Integer; DispIDs: Pointer): HResult; stdcall;
function Invoke(DispID: Integer; const IID: TGUID; LocaleID: Integer;
Flags: Word; var Params; VarResult, ExcepInfo, ArgErr: Pointer): HResult; stdcall;
public
constructor Create(const OnEvent: TProcedure);
property OnEvent: TProcedure read FOnEvent write FOnEvent;
end;
...........
constructor TEventObject.Create(const OnEvent: TProcedure);
begin
inherited Create;
FOnEvent := OnEvent;
end;
function TEventObject.GetIDsOfNames(const IID: TGUID; Names: Pointer;
NameCount, LocaleID: Integer; DispIDs: Pointer): HResult;
begin
Result := E_NOTIMPL;
end;
function TEventObject.GetTypeInfo(Index, LocaleID: Integer;
out TypeInfo): HResult;
begin
Result := E_NOTIMPL;
end;
function TEventObject.GetTypeInfoCount(out Count: Integer): HResult;
begin
Result := E_NOTIMPL;
end;
function TEventObject.Invoke(DispID: Integer; const IID: TGUID;
LocaleID: Integer; Flags: Word; var Params; VarResult, ExcepInfo,
ArgErr: Pointer): HResult;
begin
if (Dispid = DISPID_VALUE) then
begin
if Assigned(FOnEvent) then
FOnEvent;
Result := S_OK;
end
else Result := E_NOTIMPL;
end;
我怎樣才能使它適用於標籤?