large TIFFs

[Harry]

Hi Loïc,

I have to manage very large images (200 - 600 mb Tiffs). I want to step thru a treeview (filenames) and load the activated file to the GdViewer. Before I load the image, I make a CloseDocument to clear the viewer. With larger images it seems, that the file is not closed properly. I can't open the file. Do you have any idea? I have not found a funkton like a release to free the memory, close the file or thomething?!?

thanks in advantage,
Harry

[Loïc]

Hi Harry,

Please, give us some part of the code you are using to load & unload your image.

Also, are you using the latest release ?

Kind regards,

Loïc

[Harry]

Hi Loïc,

sorry for the late reply, but there was another project with higher priority.

Here is the code, I'm using to display the activated TIFF-File in a treeview:

Code: Select all

        private void myTreeView_AfterSelect(object sender, TreeViewEventArgs e)
        {
            GD_View.CloseDocument();
            GD_View.OptimizeDrawingSpeed = true;
            GD_View.DisplayQualityAuto = true;
            if (e.Node.Tag != null)
            {
                int iSZ = 0;
                if (File.Exists(e.Node.Name))
                {
                    // Loop to check if anybody else is using the file
                    for (int i = 1; i < 30; i++)
                    {
                        if (FileHandleIsFree(e.Node.Name))
                        {
                           iSZ = i;
                           i = 35;
                        }
                    }
                    if (iSZ > 0)
                    {
                        try
                        {
                           GD_PicStat = GD_View.DisplayFromFile(e.Node.Name);
                        }
                        catch
                        {
                            // ERROR-Handling
                        }
                        finally
                        {
                            if (GD_PicStat != GdPictureStatus.OK)
                            {
                                // All OK
                            }
                            else
                            {
                                // ERROR-Handling...
                            }
                        }
                    }
                    else
                    {
                        GD_View.DisplayFromFile("ERROR.bmp");
                    }
                }
                else
                {
                    GD_View.DisplayFromFile("DELETED.bmp");
                }
            }
            Application.DoEvents();
        }

Is it possible, that the event tries to open the next file while the GDViewer is opening the last one? Or Is the Problem the CloseDocument Statement

Many thanks in advantage,
Harry

[Harry]

Hi Loïc,

no solution for this Problem?

best regards,
Harry

[Harry]

Hi Loïc,

happy new year!!!
I saw, that you worked all days including the chrismas days. Do you also have a solution for my problem? I only have a few days to complete my application.

thanks a lot in advantage,
Harry

[Loïc]

Hi Harry !

Thank you & happy new year too. I am sorry but I thought your problem was already solved.

I don't understand the origin of your problem. maybe you can give me more details ?

When you say "I can't open the file.". What is the returned value of the DisplayFromFile() function ?

The GdViewer should be able to display very large file without any problem. I suspect a file lock or something like that in your application...

Cheers,

Loïc

[Harry]

Hi Loïc,

before opening the file I check, if I can get a handle for the file. i think, that i try to open the next file while the GDViewer wants to open the first one. I want to make a little test with two Buttons to load two differnt files. this will be the same like klicking it in a treeview. I will give you a status with the returncodes of the GDViewer as soon as possible.

Best regards,
Harry