C# Discussion Boards - CodeProject

Graph Coloring Program Urgently needed

18-Oct-05 8:23

That simplified things somewhat, but not a lot since I still need to get the mixed case version of the name when adding a new file, and when updating a new one. Because of the smallness (a few dozen files max) of the dataset I'm iterating across the entire folder/keyspace rather than trying to modify the datastructures since I'm not 100% conversant with how that section of the code works.

Member 235828717-Oct-05 7:25

Member 2358287

17-Oct-05 7:25

I wanted to know if anyone has the program for Graph Coloring or Map Coloring using Forward Checking.

Re: Graph Coloring Program Urgently needed

moharnas1234569-Jun-12 23:57

moharnas123456

9-Jun-12 23:57

hi i need code source of
graph coloring program

Set window position.....??

Andrew010517-Oct-05 6:37

Andrew0105

17-Oct-05 6:37

To all:
After calling Process.GetProcessById, I can get specific process. But how to get its window, and set the window position and size?

Below is my code.

Process selectedProcess = Process.GetProcessById(Int32.Parse(lvwWindows.SelectedItems[0].Text));
NativeWindow nw = NativeWindow.FromHandle(selectedProcess.MainWindowHandle);

Here, the second line return nothing. Why? D'Oh! | :doh:

The target window is not managed coded.

Thanks a lot.;)

question about Arrays

Green Fuze17-Oct-05 6:29

Green Fuze

17-Oct-05 6:29

Hey

I would like to know if there is somekind of a possibilty to create an array WITHOUT knowing its size.

lets say I want to load an array from a file, but I do not know the size of the array that I am loading.
so my solution for this, is creating a huge array (like myarray[1000]), and load to it.

but if I'm just using 2 or 3 slots, its a waste of memory.
is there a way to do it a bit better? to tell what is the size of the saved array before I load it (the array is serialized)?

Thanks!

User 665817-Oct-05 6:34

User 6658

17-Oct-05 6:34

You can use the ArrayList-class

regards

modified 12-Sep-18 21:01pm.

Green Fuze17-Oct-05 7:02

Green Fuze

17-Oct-05 7:02

thanks!

dwatkins@dirq.net17-Oct-05 6:55

dwatkins@dirq.net

17-Oct-05 6:55

You can use a hash table for this as well. Here is an example:

<br />
Hashtable hash = new Hashtable();	<br />
for (int i=0; i<10; i++){			<br />
	hash.Add(KeyHere, ValueHere);		<br />
}<br />

Replace the KeyHere and ValueHere...

Dirk Watkins

Green Fuze17-Oct-05 7:10

Green Fuze

17-Oct-05 7:10

now, thats a nice.
I''ve never used a hashtable, but I guess I will now Smile | :)

thx!

Dan Neely17-Oct-05 7:56

17-Oct-05 7:56

You do take a fair amount of memory overhead with a hashtable. The runtime keeps it at roughly 50% capacity for speed reasons. The advantage is that if you're modifying data regularly you don't need to resort with each insert. Search times are comparable with a sorted array.

S. Senthil Kumar17-Oct-05 15:18

S. Senthil Kumar

17-Oct-05 15:18

dan neely wrote:
Search times are comparable with a sorted array.

Not really, Hashtable search times are constant on average.

Regards
Senthil
_____________________________
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Urgent Regualr Expression Help Needed

futbolkeeper17-Oct-05 16:08

futbolkeeper

17-Oct-05 16:08

What about if you use an ArrayList? It should automatically change size when adding data to it. And when you declare the array you don't have to specify the size.

ArrayList list = new ArrayList();

Brian Van Beek17-Oct-05 5:14

Brian Van Beek

17-Oct-05 5:14

Hello,

I need to know how to only match if a word does not appear before the selected word.

For example, I have the sentence "there is a brown fox over there".

The word I'm trying to match would be, say "fox". However, I only want to match "fox" if the word "brown" does not appear directly before it. Any help would be greatly appreciated.

So the sentence above would not match, however the sentence "there is a fox over there" would match.

Thanks folks!

Brian Van Beek
Here's my boring blog! [^]

-- modified at 11:15 Monday 17th October, 2005

User 665817-Oct-05 6:21

User 6658

17-Oct-05 6:21

[^brown](\s|\t)+fox

That works

modified 12-Sep-18 21:01pm.

Brian Van Beek17-Oct-05 7:06

Brian Van Beek

17-Oct-05 7:06

thanks!

Brian Van Beek
Here's my boring blog! [^]

leppie17-Oct-05 8:15

leppie

17-Oct-05 8:15

Greeeg wrote:
That works

I highly doubt that! [^brown] means 'one character NOT any of (b,r,o,w,n)'.

^{xacc-ide 0.0.99-preview5 now with C#, C, IL, XML, Nemerle, IronPython and Boo highlighting support!}

User 665817-Oct-05 9:06

User 6658

17-Oct-05 9:06

Well, to be honest I was not completely sure about that. Blush | :O

How to do this correctly? I tried (word){0}, but that doesn't work.

modified 12-Sep-18 21:01pm.

Daniel Turini17-Oct-05 9:44

Daniel Turini

17-Oct-05 9:44

You need to use a Negative Lookbehind.
(?<!brown)\s+fox

Drawing over a picturebox

leppie17-Oct-05 10:22

leppie

17-Oct-05 10:22

Greeeg wrote:
How to do this correctly?

I would use explicit captures, eg:

(?<brown>brown)\s+(?<fox>fox)

Match m = Regex.Match();
return m.Groups["brown"].Success && !m.Groups["fox"].Success;

or even easier:

return !Match("brown\s+fox");

^{xacc-ide 0.0.99-preview5 now with C#, C, IL, XML, Nemerle, IronPython and Boo highlighting support!}

budidharma17-Oct-05 4:55

budidharma

17-Oct-05 4:55

I have a c# program I've been writing which dynamically loads an image. It also dynamically loads an xml file which defines rectangles within the image. Each xml entry defines the upperleft coordinate on the image, and the width and height of the rectangle.

What I need to do, is create outlines on the picturebox for each entry in the xml file. I'm not sure how to do this.

Basically, over my loaded image, if there is an entry in the xml file, for example: 10,10, 50, 50 ...
I need to draw a rectangle (outline, or full but semitransparent) over the picturebox at coordinates 10,10 width a height of 50 and width of 50.

I've no idea where to start.
Any help?
Thanks.

Re: Drawing over a picturebox

Rick Beideman17-Oct-05 6:49

Rick Beideman

17-Oct-05 6:49

Here is some code used in a paint event. If it is not in an event with PaintEventArgs you will need to get a Graphics object in another way.

private void Image_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{

Rectangle selRect = new Rectangle(0,0,0,0);
Graphics selGraphics = null;

int lineThickness = 2;
selGraphics = e.Graphics;
selRect.X = 10;
selRect.Y = 10;
selRect.Width=50;
selRect.Height=50;

Pen selPen = new Pen(Color.Black, lineThickness);
selGraphics.DrawRectangle(selPen, selRect);
}

add a delay before updating a file.

Dan Neely17-Oct-05 4:38

Re: add a delay before updating a file.

17-Oct-05 4:38

I'm using a FileSystemWatcher to detect changes made to files in a shared directory and have the app update it's internal copy of them. Rarely it detects a change and attempts to open the file to read the update before the instance of the app doing the changes has closed the file and throws an exception. I'd like to have the app wait a few seconds, and then retry loading the file, but am not sure how to do so.

S. Senthil Kumar17-Oct-05 5:07

S. Senthil Kumar

17-Oct-05 5:07

You can try using Thread.Sleep[^] to "wait" for a few seconds before retrying. Something like

while (conditionNotMet)
{
   Thread.Sleep(time);
   conditionNotMet = evaluateCondition();
}

Regards
Senthil
_____________________________
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Re: add a delay before updating a file.

Dan Neely17-Oct-05 6:56