Re: I need to resize a large image of more than 2MEGABYTE and I can not upload it to the program - C# Discussion Boards

Re: I need to resize a large image of more than 2MEGABYTE and I can not upload it to the program

28-Aug-09 4:07

Hi,

an OOM exception does not always really mean you ran out of memory! Look here[^].

I suggest you first validate your image file by opening it succesfully with one of the reputed image processing programs, such as Adobe Photoshop.

Smile | :)

Luc Pattyn

Badger | [badger,badger,badger,badger...]

Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.

OriginalGriff28-Aug-09 5:10

OriginalGriff

28-Aug-09 5:10

I agree with Luc - I regularly work with images much bigger than 2Meg without problems in C#. I would suspect your code is at fault - try it with a small test image, and it will probably give the same error.

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Re: I need to resize a large image of more than 2MEGABYTE and I can not upload it to the program

gilvani28-Aug-09 7:02

Re: I need to resize a large image of more than 2MEGABYTE and I can not upload it to the program

28-Aug-09 7:02

The problem is not in my code is on the image that is a bmp and is a large map and i tried to open the image with Irfanview with Quantum gis and with the Gimp and the Windows can not read the image data. I want to resize the image from the file system and not from the image that appears on the screen.

I have not harmed any tree to write this message but have produced a lot of smoke trying to resize the image.
Thank's

Dave Kreskowiak28-Aug-09 7:12

Dave Kreskowiak

28-Aug-09 7:12

Since nothing is opening it, it would appear that the image file is corrupted or otherwise not in an expected and supported format.

Just for giggles, what are the dimensions of the image, in pixels, and the color depth?

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Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

Re: I need to resize a large image of more than 2MEGABYTE and I can not upload it to the program

gilvani28-Aug-09 7:28

Re: I need to resize a large image of more than 2MEGABYTE and I can not upload it to the program

28-Aug-09 7:28

The windows can not give me this data but I made a program that gave me

height= 25163 px

width = 38180 px

rate of bits = 24 Cool | :cool:

Dan Neely28-Aug-09 8:37

Dan Neely

28-Aug-09 8:37

That would be more than 2 gigabytes which is a different issue entirely. Adobe editor products will open a file this large in win32; but very little else will. A while back I found a free GIS viewer that would load a monster image but can't recall what it was called. If it's only a one off your least painful option might be to use a liveCD to use the linux version of GIMP to resize it; as of a year ago the win32 version puked on a file that big. I haven't tested under win64, so I don't know if that combo would work any better.

The latest nation. Procrastination.

Re: I need to resize a large image of more than 2MEGABYTE and I can not upload it to the program

Dave Kreskowiak28-Aug-09 12:07

Dave Kreskowiak

28-Aug-09 12:07

There is no contorl that is going to load that image. You have to either find a library that will do what you want without loading the image, or write one yourself. Writing one yourself is NOT a trivial task, since you must known what the exact format of the image file is and how to work with the data. Then, you need to know about other image processing algorithms to pick out and blend individual pixels so that you can assemble the data in a smaller file, again, knowing the exact format of the image file you want write.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

Re: I need to resize a large image of more than 2MEGABYTE and I can not upload it to the program

gilvani28-Aug-09 8:53

Re: I need to resize a large image of more than 2MEGABYTE and I can not upload it to the program

28-Aug-09 8:53

sorry I was wrong the image is 2.68 gigabytes
not 2 megabytes. Can anyone help me? Dead | X|

OriginalGriff28-Aug-09 8:27

OriginalGriff

28-Aug-09 8:27

I think the problem may be your image then. I regularly deal with images that are in excess of 170Meg without problems, and as a simple test, I just saved one of these as a 8.5Meg .BMP file. In Paint (surely the most basic of basic rubbish image programs), it opens, edits, and saves without problems.
I would try with a different image; I suspect yours is not what you think it is.

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Re: I need to resize a large image of more than 2MEGABYTE and I can not upload it to the program

gilvani28-Aug-09 8:56

Re: I need to resize a large image of more than 2MEGABYTE and I can not upload it to the program

28-Aug-09 8:56

sorry I was wrong the image is 2.68 gigabytes
not 2 megabytes. Can anyone help me?

DaveyM6928-Aug-09 13:24

DaveyM69

28-Aug-09 13:24

The only thing I can think of is to get a handle to the file without actually loading the file into memory (OpenFile [^] may do this - if not, there may be other functions that will).

Once you have that, you can read the data in the file in sections and do what you wish with them, carefully disposing of each section from memory as you go. You'll need to understand the image format so you can interpret the headers and the image data itself.

I have no idea with regards to the implementation of this - just an idea that may work.

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Problem in connect with Remote server??

RA|-|UL PATEL28-Aug-09 3:32

RA|-|UL PATEL

28-Aug-09 3:32

Problem: Login failed for user '(null)'. Reason: Not associated
with a trusted SQL Server connection.

Request
This problem is generate when i connected with remote server
i want to connection between two server to transfer data from
one table to another.and i got data froms local server but when
connect to another server then this problem arise..

From Mr.Saunat Sharma

Re: Problem in connect with Remote server??

Searril28-Aug-09 3:57

Searril

28-Aug-09 3:57

Would probably be a good idea to start by pasting the code, especially your connection string.

Also, have you checked the value of your User to ensure it's not null since that's showing up in your error message?

Also again, if you're trying to use trusted connection (rather than SQL security) are you ensuring the workstation is actually logged into a domain account with proper rights?

Re: Problem in connect with Remote server??

DoctorMick28-Aug-09 5:31

DoctorMick

28-Aug-09 5:31

Are you using web services to connect to the remote server? I seem to remember an issue with user details not being able to be passed through from one web service to another.

Re: Problem in connect with Remote server??

RA|-|UL PATEL28-Aug-09 18:01

RA|-|UL PATEL

28-Aug-09 18:01

thanx DoctorMick.

exactly as u r telling me.
This Problem arise when i am using windows service.
What i m doing,Access records from one table from local server.Store it in dataset and then i will go for inserting record to Remote server.But i am unable to connect to remote server.

CheckBox initial value [SOLVED]

mostofmonty28-Aug-09 3:20

28-Aug-09 3:20

This is part of my program that activates the mouse movement sensor once a checkbox is ticked.

What i want is for it to be activated by default.

I've tried editing the checkbox in designer view of the form, setting the value to true, but the mouse movement is still not picked up until the checkbox is unchecked then rechecked.

Im new to C#, im assuming it's something to do with "CheckedChanged"....?

This is the code for the checkbox:

private void checkBoxOnMouseMove_CheckedChanged(object sender, EventArgs e)
        {
            if (checkBoxOnMouseMove.Checked)
            {
                HookManager.MouseMove += HookManager_MouseMove;
            }
            else
            {
                HookManager.MouseMove -= HookManager_MouseMove;
            }

Any help at all would be greatly appreciated Smile | :)

modified on Friday, August 28, 2009 9:34 AM

Manas Bhardwaj28-Aug-09 3:26

Manas Bhardwaj

28-Aug-09 3:26

You should add this line in your form load event.

if (checkBoxOnMouseMove.Checked)            
{                
HookManager.MouseMove += HookManager_MouseMove;            
}

This will attach the event during the load.

Manas Bhardwaj
Please remember to rate helpful or unhelpful answers, it lets us and people reading the forums know if our answers are any good.

DaveyM6928-Aug-09 3:28

DaveyM69

28-Aug-09 3:28

You need to add this into the form's constructor or Load handler too so the subscription is already active when the form loads.

HookManager.MouseMove += HookManager_MouseMove;

mostofmonty28-Aug-09 3:31

28-Aug-09 3:31

Where and what is the form's constructor or Load handler?

My code is made up of bits and pieces here and there, so i dont know it inside-out. Just a brief understanding.

[EDIT] - never mind, i have found it and got it working Smile | :)

Thank you so much for the help Smile | :)

Luc Pattyn28-Aug-09 4:09

28-Aug-09 4:09

mostofmonty wrote:
Where and what is the form's constructor or Load handler?

mostofmonty wrote:
never mind, i have found it

Seems you are pretty C#-ignorant then, and just trying your luck at random. I suggest you do yourself a favor, buy and study a book on C#.

Smile | :)

Luc Pattyn

Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.

mostofmonty28-Aug-09 4:17

28-Aug-09 4:17

I do apologise for being new to C#.

I am interested in learning to write programs in C#, and am hoping to pick up as many things as i can through the questions i ask on this forums. Even if they are stupid.

I have my program working thanks to the help on this forum,

So again, i appreciate all the help Smile | :)

And i apologise for any future stupid/ignorant questions.

Luc Pattyn28-Aug-09 4:24

28-Aug-09 4:24

No need to apologize, everyone is new to something at some point.

However, rather than spending 100+ hours at asking 100+ questions and reading and testing all the answers, good and bad ones, you'd better take this advice[^]. And then ask more intelligent questions when they arise. Which we will be glad to answer.

Smile | :)

Luc Pattyn

Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.

mostofmonty28-Aug-09 4:32

28-Aug-09 4:32

I was considering buying a book on C#, but i shall take your advice and make it a priority Smile | :)

Thanks everyone for the help on my ignorant question, wont happen again Smile | :)

Luc Pattyn28-Aug-09 4:45