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Hi ,
I want to filter the selected color from the image.I had already done the filtering the whole image with grascalling and making contrasting whole image but now i want to filter the image with selected color,Now i want to know logic for filtering the selected image.
here i am using the logic for contrasting the image (means filtering the whole image),now can anybody say how to deduct or filter the selected R,G,B value from the whole looping.Here i am describing whole loop which i am using for contrasting the image.
public void MakeContrastUnsafeFaster(int nContrast)
{
//Getting the how much pixel Arrays do you want to retrives.
Point size = PixelSize;
//Locking the bitmap for getting great performance
LockBitmap();
for (int y = 0; y < size.Y; y++)
{
PixelData* pPixel = PixelAt(0, y);
for (int x = 0; x < size.X; x++)
{
byte value = (byte) ((pPixel->red + pPixel->green + pPixel->blue) / 3);
// perform contrast enhancement here:
value = (value < 150 ) ? byte.MinValue : byte.MaxValue;
pPixel->red = value;
pPixel->green = value;
pPixel->blue = value;
pPixel++;
}
}
//Now Unlocking the Bitmap and making it free.
UnlockBitmap();
}
Here i am setting the R,G,B value with minimum and maximum value which bifercare my image into only black and white,
Now my requirement is that what to do in this logic by which only selected color dropped out?
anybody help into that?
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How can one define a class in multiple files?
Sometimes there are classes with huge amount of code that wouldn't have sufficient reason for a hierarchy of classes (as the main class of a web service) but still are difficult to maintain because of the large amount of code in one file and even more difficult to be used by multiple developers in the same time. So, is there a way to span a class over multiple files?
Cheers
Dani
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.NET 2.0 is supporting multiple files for a single class using the partial keyword in C#. You can read more about this feature in this article.[^]
On the other hand, if a class grows that large, I'd consider a review on the design. 
hth,
Matthias
I love deadlines. I like the whooshing sound they make as they fly by.
[Douglas Adams]
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How i can change system time in C#?
Nothing
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I am building billing software in C#. I need to print bills at POS (Point Of Sale) and most of the time I am dealing with dot matrix printers like Epson LX 300.
Using normal c# printing procedures, after I am finished printing, printer automatically ejects the whole page. To save this, I have reduce paper size to few cm from printer page settings. In some cases, the associated driver like Epson LX 300+ doesn't let me set size smaller than 1 inch.
Is there any method in C# to print one line (or one char) at a time? For example - like when we print from command prompt
c:\>echo hello > prn
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You'll need to skip the normal printing functions entirely. When using these functions, your not printing to the printer, but to a graphics object that represents the image of the page. When that graphics object is completely drawn (in your case, a single line of text), the image contained in the graphics object (the ENTIRE page) is then sent to the printer driver for print.
You can find an example of printing directly to the printer here[^] on MSDN.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Thanks for the link. I guess I found what I been looking for. Now I am not at liberty to choose font of my choice except that is already present in the printer. But this solution is more important than selectable font/size.
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Most printers DO have multipkle fonts built into them, along with Bold, Italics, Underline, different point sizes. All you have to do is consult the manual on the printer. It'll also give you the ESC codes to send to the printer to select those fonts. I haven't done it in about 10 years, but I know they're there.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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hi all
i am trying to validate a text box entry.
i want to enter hex data in the text box.
so in the keyDown event of the textbox if the user presses an invalid key i say e.Handled=true. but still the keypressed appears in the text box.
private void textBox1_KeyDown(object sender,System.Windows.Forms.KeyEventArgs e)
{
if(e.KeyValue==65)
{
e.Handled=true;
}
}
this was the sample code i was trying to disable typing of 'a'
can any one help me????
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Key off of the KeyPress event rather than the KeyDown event.
Darryl Borden
Principal IT Analyst
dborden@eprod.com
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what is the key off event?
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There is no "key off" event.
Use the "KeyPress" event - not the "KeyDown" event
Darryl Borden
Principal IT Analyst
dborden@eprod.com
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Hi,
I trying to run process with System.Diagnostics.Process object.
When defining the WorkingDirectory to be a virtual folder (Drive that has been created with subst). it throws an exception "The directory name is invalid".
Did anyone had such a problem?
Any solutions?
Thanks,
Ori.
BTW,
It works great on win2000
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Hi everyone!
I need to manage local computer's network routing table (i.e., add/remove gateways) from a C# application. In other words, i need to perform, programmatically, operations equivalent do "ROUTE ADD", "ROUTE DELETE" and "ROUTE PRINT" DOS commands. As of right now, i simply launch instances of command prompt with these commands, but it is very cumbersome.
Anyone knows how can i do it using .NET framework or Windows API?
Thanks a bundle!
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You'll need to check into the Routing Protocol Interface in the Platform SDK, here[^] on MSDN. There is nothing in the .NET Framework BCL that will do this for you, so you'll have to write your own library to P/Invoke that appropriate functions and parameters.
[EDIT]
Whoops! My bad! Check out the Routing Table Manager (Version 1[^] and Version 2[^]) for what you need. Still, there is nothing in the .NET BCL that does this for you.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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What is the best way to work with multiple db connections? I mean that I ahave an app with a TreeView on it and for each node(if he has some props)I want to use a diffrent db (MsAccess) connection, what i did is that when I press a node I verify the conditions and if they are OK I
[] conn=new OleDbConnection(strConnect); []is this the best way?
(o)(o)
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I have a RichTextBox on my form and I want to save the text that a user writes into it in a AccessDB but I want to save the formatted text not only plain txt I have seen in some programs that the db table has 2 columns one for the plain txt and one for some enconding I do not know but I know for certain that in that column all formatting are hold, is there a way to do this?
Because to insert the rtf format to the DB is not realy efficient I think! Or maybe you can point me to the right direction!
(o)(o)
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Hey i've been working on a note taking application were the user may enter details for a specific date and the details will be recorded into an access database.
the five things that get recorded are:
unique id number (autonumber)
person who entered the data
what date it was entered on
the date it is entered for (what date does the task have to be done on)
details of the task.
At the moment i'm working on getting the edit entry feature to work. In the edit entry class of the program two comboboxes are populated with the id number and the details of each entry respectively (ie. the user can select which entry they wish to update by either selecting an entry number or the details of an entry). I've tried a tutorial similar program and gotten the update command to work, but this time it continues to give me a message error about no default values for the parameters.
You can find the zipped file with the program and the database at http://users.mackay.net.au/~plthomas/CalendarDatabase.zip[^], what i want to happen is, all the details submitted on the right hand side (the edited version of whatever entry the user selects) to be updated into the database in place of the old entry. If anyone would be kind enough to give me a hand it'd be much appreciated, i'm still new to the c# programming language and am trying to get this damn school assignment done  .
The connection string assumes the database is in the "c:\" file directory. If you give the program a run you'll see what i mean when you click the update entry button. Thanks in advance,
Bryce.
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hi folks
i m facing a strange bug
when ever i run my Window Application programm , always , a console window opens first then my window Application program opens. also if i close the console window , then the whole programm stops .
what should i do for removing this bug
n e idea plz
with regards
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May be you've chosen the wrong project type when you created the project? Did you select Console Application or Windows Application? Anyway, you can change it right away by right clicking on the project in Solution explorer, clicking Properties and changing the Output type under Common Properties->General.
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
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how to create a c# webservice which will dynmically generate an xml file for the folders structure on iis webserver and send it to to a windows form client
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Hi Aman,
Will this work for you?
[WebMethod]
public XmlDocument GetXML()
{
XmlDocument xmldoc = new XmlDocument();
xmldoc.LoadXml("<person> <name>pani");
return xmldoc;
}
you can create a XmlDocument object and return it from your webservice.
Thanks and Regards
SGS
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Thanks buddy,
but need to dynamically generate an xml file whcih will have my folder structure.
for example...
on my webserver i have folder ABC which has subfolders
Aman,Danny,Reena.
i need to dynmically create an xml file with this tree structure and send it to windows form client..
your Help is awaited.......
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