Re: Getting Bitmap file size,,, - C# Discussion Boards

DropDownList(c# window forms)-control the The Repetetions

8-Aug-07 1:17

Are you aware the CodeProject holds more than 1000 articles, some very good ones ?
A simple search would give many examples.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

this weeks tips:
- make Visual display line numbers: Tools/Options/TextEditor/...
- show exceptions with ToString() to see all information
- before you ask a question here, search CodeProject, then Google

Vik Kommineni8-Aug-07 0:25

Vik Kommineni

8-Aug-07 0:25

hi i am facing with one problem

in c# windos application i created the five list boxes .Each listbox havie some same fildes.
if i select one item in one box tht wont repeate again the remining the drodown boxes.what cani ido pls inform that one to me
ok
regards,
vikramk1410@gmail.com

kommineni vikram

Re: DropDownList(c# window forms)-control the The Repetetions

Sgg2458-Aug-07 0:39

Re: DropDownList(c# window forms)-control the The Repetetions

8-Aug-07 0:39

Ur question is very un-clear.. it doesnt suggest wat u r trying to do and wat is the problem..
better write ur prob in points rather to use single sentence, like wat u r doing, wat u want to do and wat the problem is

Regards
SG (sgg245@yahoo.co.in)

kabeervh8-Aug-07 0:45

kabeervh

8-Aug-07 0:45

Hi,

Ur adding same fields in all the five list boxes. U create a procedure for this procedure with a parameter string. While loading the program call it with null string. While selecting a ddl call it with the selected string. Inside the prcedure u check the parameter and if it null add all to all ddls else all all except the string... IS it a solution to ur problem..

Regards
Kabeer V H
kabeervh@yahoo.com Big Grin | :-D

im kabeer vh

Getting Bitmap file size,,,

tmp08-Aug-07 0:04

tmp0

8-Aug-07 0:04

Hello all,

I have two Bitmap objects, and I want to get the storage/file size of these bitmaps without having to save them on the file system.

I can get a file size if it is saved on the hard disk, so I can save the bitmaps then get their size in byte... However, I need a more efficient way: getting the size while the objects are in memory.

I hope my question is clear!

Naimi

Re: Getting Bitmap file size,,,

Luc Pattyn8-Aug-07 0:22

Re: Getting Bitmap file size,,,

8-Aug-07 0:22

the file size of a BMP size directly relates to the bitmap's dimensions.

I guess the relationship is bytes = a * wid * hei + b

a few experiments will tell you what the values for a and b should be.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

tmp08-Aug-07 0:30

tmp0

8-Aug-07 0:30

Hi Luc,

Both files have the same dimensions.
When I save the files as gif, I get different sizes - that is what I am looking for.
Is there a way to get the size of the images as if they were saved as gif files? (without actually saving them!).
What i'm trying to do is to compare two images, and find out if they were identical. Of course, this is a terrible way to do it, however, I need the fastest method (because I have so many images). Plus, it is not a critical matter, so if some images were mistakenly identified as the identical, that is not a big deal.

Any ideas?

Re: Getting Bitmap file size,,,

Luc Pattyn8-Aug-07 1:16

Problem with EnvDTE.ExecuteCommand and Source Control (C#)

8-Aug-07 1:16

Hi,

BMP files are uncompressed, that's why their sizes directly relate to image dimensions.
GIF files are LZW-compressed, hence you can't predict the file size.

If you don't want to save to disk, you can also save to a (memory) stream.
However it remains an expensive operation.

Now you are asking a completely different matter: image comparison.

When do you consider two images identical? is it you have two Bitmap instances,
and their dimensions, and all pixel values are identical ?
or is it they both show the Liberty Statue ?
or something in the middle ?

If you want to check for identical pixel content, this is what I would do assuming
a large number of images:

- create a dictionary (or Hashtable)
- now iterate over all your images, one by one.
for each image, create your own hash code; I suggest a function of
image width W, image height H, ARGB value of pixel (10,10) and pixel (W/2, H/2) and
pixel (W-10,H-10).
ARGB value is the result of Color.ToArgb()
That was 5 values; you could do hash=(hash<<1)^newNumber for each of them,
starting with zero (^ is exor operator)
- check dictionary for presence of hash code; if not, create a new List (or ArrayList),
add (hash, list) to dictionary, and add image to the new list
if hash already existed, you found a possible match and you now must compare the image
with all images in the list checking all pixels.
To do that, use lockbits and pointers (look it up in MSDN
and read CodeProject articles on image processing by Christian Graus).

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

jedibald8-Aug-07 0:01

jedibald

8-Aug-07 0:01

Hello,

Here I'd like to have an advise with something that kept me busy for days and that I couldn't make work.

I'd like to use the EnvDTE.ExecuteCommand("File.Checkin"), and all the commands related to scc (File.AddtoSourceControl, etc ...). But I'd like to know if it's possible (and if yes, how Smile | :)

to choose the file that we want to checkin (maybe using a parameter), because with these commands it always refers to the file where the code executes, and that's not what I want, as I have to deal with some files in this code.

If it's not possible, how can we use the SCC functions directly in C#, because our program may execute in different environments where different SCC providers could be installed (VSS, Clearcase, etc ...), and it would be so cool to use one unique code to deal with theses SCC, if it's possible, using the native SCC code.

The last possibility would be to implement the different COM components of the SCC, and to refer on the Register SCCprovider key to know which one to use, but if something easier could be done I would be so happy Smile | :)

Maybe another solution exists that I'm not aware of ?

Anyway, thanks.

François

How to LogOff Locked Computer

Muhammad Hafeez Ullah7-Aug-07 23:48

Muhammad Hafeez Ullah

7-Aug-07 23:48

I am working on a project in which I have to Log Off the locked computer. I use SessionSwitch to listen the windows locked event, and I used ExitWindows(0,0) to Log Off.

But this API function is not working on the Locked computer.

Another stratagy is to first unlock the computer and then use ExitWindows(0,0) to Log Off.But unfortunatly I am unable to Unlock the windows. Kindly help me to solve my problem.

Using CAPSLOCK status in StatusBarPanel

Sgg2457-Aug-07 23:19

7-Aug-07 23:19

I m using a status bar in the form.
In one of the panels of the status bar, I just want set the status of the CAPSLOCK & NUMLOCK, the same way it can be done in VB. But in VB the panel properties has different display value, so it was easy.
How this can be achieved in C#??? Confused | :confused:

Thanks in advance... Smile | :)

Regards
SG (sgg245@yahoo.co.in)

Luc Pattyn8-Aug-07 0:26

8-Aug-07 0:26

The properties Console.CapsLock and Console.NumberLock provide the necessary information.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Sgg2458-Aug-07 1:20

8-Aug-07 1:20

Thanks so much. Its working.
But stil a prob.
This is when the application start it detects if the CAPSLOCK is ON then I can display certain msg or so...

But I want whenever CAPSLOCK button is pressed then it should update the status of the panel in the status bar.

If CAPSLOCK is ON then status bar panel should show ON.
If CAPSLOCK is toggled i.e. OFF then status bar panel should show OFF.

Something like this...

Thanks in Advance...;) Smile | :)

;)

Regards
SG (sgg245@yahoo.co.in)

Luc Pattyn8-Aug-07 1:37

8-Aug-07 1:37

Hi,

there are at least two ways to keep your status bar up-to-date:

1. on your form, set KeyPreview true; then add an event handler for KeyDown;
the handler now will fire for every key moving down; in the handler check for Keys.CapsLock;
if it is, use Keyboard.CapsLock and update the status bar; don't try to count the toggles
yourself !

2. on your form, add a Windows.Forms.Timer and let it fire say every second;
in its Tick handler read Keyboard.CapsLock and update status bar.

The choice is yours, it depends a bit on which of those handlers you may already have
for some other reason.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Sgg2458-Aug-07 2:22

8-Aug-07 2:22

Thanks very much.
I anticipated something like we used to do in VB status bar panels...
Anyways, again thanks for ur help... so kind of u... Big Grin | :-D

Regards
SG (sgg245@yahoo.co.in)

Luc Pattyn8-Aug-07 3:37

8-Aug-07 3:37

You're welcome.

Come to think of it, I would prefer the timer approach; with key events, if your app
looses focus, capslock gets toggles, app gets focus back, you will not know about the
change (unless you add code to some other events too, such as Activate).

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Word compatibility

Spaz807-Aug-07 23:14

Spaz80

7-Aug-07 23:14

Hello

Im writing a Word application that shall be used on machines with Office 2003 or later versions. On the developer machine I have Office 2007.

Im having trouble creating the application so that it works on the test PC witch is using Office 2003. Can anybody help me with a solution on how to use a assembly from Office 2003 in my project... C# Smile | :)

Thanx

Spaz

satsumatable8-Aug-07 1:44

satsumatable

8-Aug-07 1:44

Hi
.Net framework itself provided you with Word library (In reference COM Tab you can see Microsoft Word Object Library) this should help out you to work around Word applications.

Thanks

Spaz808-Aug-07 1:59

Spaz80

8-Aug-07 1:59

Thanks for the reply

The Word Library only contain version 12, witch is Office 2007. If I compile my application with that library and deploy it on a machine with Office 2003 I get this error:

System.IO.FileLoadException: Could not load file or assembly 'Microsoft.Office.Interop.Word, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

So I need a way to compile my application with Microsoft.Office.Interop.Word, Version=11.0.0.0

Thanx

Spaz

satsumatable8-Aug-07 3:29

satsumatable

8-Aug-07 3:29

OK., when you add the reference into your project you will see some DLLs like

WORD
VBIDE
MICROSOFT.Office.Core

While you create setup you need add that library as part your setup and there you will see one DLL called MSO.DDL go to the properties and in Register Property select "vsdrfCOM" and build your setup.

This you no need to have any MS Office at your deployment PC. Please let me know if you havve any hiccup.

Thanks
Siva