How to download an imagefile to my pc from the web

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3 total messages Started by Asger Jorgensen Fri, 27 Jul 2007 22:12

#223

Author: Asger Jorgensen
Date: Fri, 27 Jul 2007 22:12

20 lines
1477 bytes

Hi there 

I need to download an image from the net and then show 
it in my app in a TImage.

The testfile is: http://asger-p.dk/stark.bmp

I have Indy 9 installed, but I don't have a clue 
as to how I do this.

Could somebody be so kind as to show a little piece of code.
Then I will be very very greatfull.

By the way is there a place where I can get c++ examples
on how to use the different Indy components.
I have a very good one for the TidFTP I got that a couple 
of years ago but I can't remember from where.

Thanks in advance
Asger

Re: How to download an imagefile to my pc from the web

#224

Author: Remy Lebeau (TeamB)
Date: Fri, 27 Jul 2007 22:42

57 lines
2573 bytes

"Asger Jorgensen" <Junk@Asger-P.dk> wrote in message
news:MPG.21148c4b892d11cd9897b9@newsgroups.borland.com...

> I have Indy 9 installed, but I don't have a clue
> as to how I do this.

Use the TIdHTTP component, passing the URL to its Get() method, to download
the image to a temporary file, and then you can load that into the TImage
afterwards, ie:

    AnsiString FileName = "c:\\folder\\stark.bmp";

    TFileStream *Strm = new TFileStream(FileName, fmCreate);
    try
    {
        try
        {
            IdHTTP->Get("http://asger-p.dk/stark.bmp", Strm);
        }
        __finally {
            delete Strm;
        }
        Image1->Picture->LoadFromFile(FileName);
    }
    __finally {
        DeleteFile(FileName);
    }

If you know that the image will always be a bitmap, then you can bypass the
temporary file altogether and download the image into a TMemoryStream
instead, and then load it into TBitmap for the Timage to display, ie:

    TMemoryStream *Strm = new TMemoryStream;
    try
    {
        IdHTTP->Get("http://asger-p.dk/stark.bmp", Strm);

        Strm->Position = 0;
        Image1->Picture->Bitmap->LoadFromStream(Strm);
    }
    __finally {
        delete Strm;
    }

> By the way is there a place where I can get c++ examples
> on how to use the different Indy components.

There aren't very many demos available for C++, sorry.

> I have a very good one for the TidFTP I got that a couple
> of years ago but I can't remember from where.

There are demos on both Indy's and AToZed's websites.


Gambit

Re: How to download an imagefile to my pc from the web

#225

Author: Asger Jorgensen
Date: Fri, 27 Jul 2007 23:34

6 lines
1078 bytes

Hi Remy

Thank You very much!!

Best regards
Asger

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