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Date Posted: 15:37:13 04/04/02 Thu
Author: Gerson Guerios
Subject: Re: Internet Browser an plug-in
In reply to: Michel 's message, "Re: Internet Browser an plug-in" on 17:50:56 04/03/02 Wed

Hi Michel

I thank your information.

I am using a function to download the file from server to browser. It is working very well.

But, it remains a problem.

Before the exhibition of the file an exception is generated (EEnvisionError) with the following message:
' Frame 1 does not exist' !!

You could help me.

Best regards,
Gerson

>
>Hi Gerson,
>
>I don't have any experience with this. One thing is
>sure, TMemoryStream.LoadFromFile expects a file on the
>file system, not a http link.
>
>You cannot load a file given an http link. I am not
>sure what you intent is. If this is really a file
>located on a web server, you would need a http client
>to get the file from the server first.
>
>Best regards,
>
>Michel
>
>
>
>
>>Hi Michel
>>I am developing an ActiveX with the purpose of showing
>>images in browser.
>>
>>Question:
>>
>>how to open a file using http?
>>
>>Example:
>>var
>> stream: TMemoryStream;
>>begin
>> ffileName := '<a rel=nofollow target=_blank href="http://asp007/chapter1.tif';">http://asp007/chapter1.tif';</a>
>>
>>
>> BeginHourglass;
>> try
>> stream := TMemoryStream.Create;
>> stream.LoadFromFile (ffileName);
>> PageUpDown.Min := 1;
>> imageScrollBox.AntiAliased := True;
>> imageScrollBox.LoadFromStream (stream, ' .tif ',
>>0);
>> pageUpDown.Max := imageScrollBox.FrameCount;
>> PageEdit.Text := ' 1 ';
>>
>> finally
>> EndHourglass;
>> end;
>>
>> FDirty := False;
>>
>>/ / ZoomEditChange(Self);
>>
>> Result := True;
>>end;
>>
>>Message comes back informing error when opening the
>>file!
>>
>>Could it help me?
>>
>>Gerson
>>>
>>>Hi Gerson,
>>>
>>>I am not familiar with the programming of plugins.
>>>Envision would be able to help to read the files, but
>>>you'll need information on how to create the plugins.
>>>
>>>In IE, you could create an ActiveX, but I tend to
>stay
>>>away from these as much as possible.
>>>
>>>Best regards,
>>>
>>>Michel
>>>
>>>>Michel
>>>>
>>>>I would like to build an application to visualize
>>>>images in Internet Browser, using the language
>>Delphi.
>>>>
>>>>
>>>>How can I use ' Envision Image Library' in a program
>>'
>>>>plug-in '?

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