Release memory quickly? - C# Discussion Boards

Re: Tabbing to next edit box using Enter key

dynamic27-Jul-03 13:36

dynamic

27-Jul-03 13:36

C#:

<font color="blue">private</font> <font color="blue">void</font> textBox1_KeyUp(<font color="blue">object</font> sender, System.Windows.Forms.KeyEventArgs e) <br> { <br> 	<font color="#0000FF">if</font> (e.KeyData.Equals(Keys.Enter)) <br> 	{ <br> 		textBox2.Focus(); <br> 	} <br> }

Vb:

<font color="blue">Public Function</font> TwinsOnWay(<font color="blue">ByVal</font> twins <font color="blue">As String</font>) <font color="blue">As String <br>     Select Case</font> twins<br>         <font color="blue">Case</font> "Gender" <br>             <font color="blue">Return</font> "Two Girls" <br>     <font color="blue">End Select <br> End Function</font> <br>

Re: Tabbing to next edit box using Enter key

eggie527-Jul-03 19:07

eggie5

27-Jul-03 19:07

I like it when you get an error message box and forgot that you had your speakers turned up all the way...

/\ |_ E X E GG

Embedded Resources

Brian Delahunty27-Jul-03 4:35

Brian Delahunty

27-Jul-03 4:35

Hey All,

Just wondering if there is a simple way to save a resource to disk. If I embed an exe into my program as a resource, how could I then save that exe to disk so I could execute it.

Regards,
Brian Dela Smile | :)

Re: Embedded Resources

leppie27-Jul-03 5:23

leppie

27-Jul-03 5:23

Assembly.GetManifestResourceStream()

Note: by default VN.NET adds the default namespace to the resource name. EG

brain.myvirus.exe Smile | :)

leppie ::AllocCPArticle(Generic DFA State Machine for .NET);

Re: Embedded Resources

Brian Delahunty27-Jul-03 5:29

Brian Delahunty

27-Jul-03 5:29

leppie wrote:
brain.myvirus.exe

lol... nope... I'm embedding plink.exe [from http://www.chiark.greenend.org.uk/~sgtatham/putty/[^]] into my program.

Thanks for that Big Grin | :-D

Regards,
Brian Dela Smile | :)

Re: Embedded Resources

leppie27-Jul-03 5:35

leppie

27-Jul-03 5:35

And if that is too big, you can use my bz2lib wrapper to compress it Smile | :)

leppie ::AllocCPArticle(Generic DFA State Machine for .NET);

Re: Embedded Resources

Nick Parker27-Jul-03 18:22

Nick Parker

27-Jul-03 18:22

Brian Delahunty wrote:
I'm embedding plink.exe

I have putty installed on my computer now, I love that little app, so many things that you simply can't do with MS Telnet. Smile | :)

-Nick Parker

Release memory quickly?

novachen26-Jul-03 23:38

novachen

26-Jul-03 23:38

Hi!

I write a simple image processing tookit in c#. I face a trouble that c# seems didn't release the garbage. because my image is fairly large (around 6000*6000), it is very apparent. After several operations, physical used up, the pc works very slowly.

Give a simple example. There is a picturebox in the form, in form_load, load a 6000*6000 gray image into picturebox.

Then

private void button1_Click(object sender, System.EventArgs e)
{
Bitmap dst;
bool ret = Form1.Dup(this.pictureBox1.Image as Bitmap, out dst);
if (ret)
{
this.pictureBox1.Image = dst;
}
}

//get a new image from the original one
public static bool Dup(Bitmap src, out Bitmap dst)
{
dst = new Bitmap(src.Width, src.Height, src.PixelFormat);
dst.Palette = src.Palette; //it will be black, but never mind, just take the space

return true;
}

After press the button several time, i can see a lot of memory is taken by this process. and it seems not to release it at all. But in my code, only one copy is reference by pictureBox1.Image.

anybody know how to solve it?
Thanks!!

Re: Release memory quickly?

leppie27-Jul-03 3:14

leppie

27-Jul-03 3:14

Bitmap.Dispose()?

leppie ::AllocCPArticle(Generic DFA State Machine for .NET);

Algorithm needed

albean26-Jul-03 15:02

albean

26-Jul-03 15:02

I have two sets: A{1,2,3,4,5} and B{1,3,5}

I need to create set C{2,4}.

Is there an optimal algorithm designed for this task?

Right now I’m simply going to stick A into an array and sort it.

Then I’ll iterate through each element in B and do a binary search for it in A. If not found then put it into C.

Is there a better way?

Re: Algorithm needed

Anonymous26-Jul-03 17:00

Anonymous

26-Jul-03 17:00

Try the following site

http://home.att.net/~srschmitt/Sets_class.html

Smile | :)

Re: Algorithm needed

Jim Stewart26-Jul-03 17:01

Jim Stewart

26-Jul-03 17:01

Try this[^].

α.γεεκ

Fortune passes everywhere.
Duke Leto Atreides

Re: Algorithm needed - Thanks!

albean26-Jul-03 17:28

albean

26-Jul-03 17:28

CP rules! Thanks guys. Your suggestions were great . . . and that set article is terrific!

Re: Annoying Properties

albean26-Jul-03 14:57

albean

26-Jul-03 14:57

I’m not familiar with the Modified property but the locked property, from what I understand, is only used by the designer. I find that it comes in handy when you don’t what a control to get moved by mistake.

Did you write the designer in C#? I’m not trying to be cute, but perhaps you should make this “bug” a “feature”.

Re: Annoying Properties

albean26-Jul-03 15:16

albean

26-Jul-03 15:16

Hey Zero,

Sorry to get off topic but I tried to create a designer in C# about a year ago and gave up. The problem that I ran into was:

1)Place a control onto the workspace.
2)Place a second larger control that completely covers the first control.
3)Click and do a rubber band select of the second control (the rubber band rect completely surrounds both controls.)
4)Release the mouse.

Now both controls should be "highlighted" to show that they are selected. You should see the highlight of the fist control appear on top of the second control - even though it is totally "under" the second control and not visible. (That's how it works in visual studio.)

I overrode every thing I could think of and even tried doing things in the WndProc to get the first control’s "highlight" rect to appear on top of the second control but nothing I did would make it appear because the second control was always drawn over the first’s highlight rec.

How did you accomplish it?

Re: Annoying Properties

StealthyMark27-Jul-03 23:44

StealthyMark

27-Jul-03 23:44

The Visual Studio IDE is used by Developers. These kinds of people dislike being restricted.

Send Error Message From Web Service To its client

Mazdak26-Jul-03 9:30

Mazdak

26-Jul-03 9:30

My web service methods return some non-string value(for example DateTime) , I want when some error(Exception) happend in my method I retuurn that error to the client. How can I report it to the client,for example send a string messsage error?

Mazy

No sig. available now.

Re: Send Error Message From Web Service To its client

SimonS26-Jul-03 23:21

SimonS

26-Jul-03 23:21

One way could be to always return an XML string that could contain one of the following elements:
<ERRORS>
or
<RETURNVALUE>

Cheers,
Simon

"Don't try to be like Jackie. There is only one Jackie.... Study computers instead.", Jackie Chan on career choices.
animation mechanics in SVG (my first abstract photo)

Re: Send Error Message From Web Service To its client

Mazdak27-Jul-03 4:38

Mazdak

27-Jul-03 4:38

Thanks Simon.

How can I do this in my web service code?

Mazy

No sig. available now.

Re: Send Error Message From Web Service To its client

SimonS27-Jul-03 6:24

SimonS

27-Jul-03 6:24

You'd need to wrap the error/return value into a string manually.
Not sure how you could automate that. Maybe using an HTTPHandler?

Cheers,
Simon

"Don't try to be like Jackie. There is only one Jackie.... Study computers instead.", Jackie Chan on career choices.
animation mechanics in SVG (my first abstract photo)

Re: Send Error Message From Web Service To its client

Mazdak27-Jul-03 9:58

Mazdak

27-Jul-03 9:58

hmmm..I'll try it. Smile | :)

Mazy

No sig. available now.

How to set a datasource for a usercontrol?

STW26-Jul-03 9:21

STW

26-Jul-03 9:21

I would like to make a usercontrol with a datasource. How is this possible?

Re: How to set a datasource for a usercontrol?

StealthyMark27-Jul-03 23:58

StealthyMark

27-Jul-03 23:58

Inherit your control from ListControl. It contains the base implementation for binding a control to a list. If you just want to bind your control to a single value, take a look at the Control.DataBindings property.

New to graphics drawing.....any assistance?

LongRange.Shooter26-Jul-03 3:26

LongRange.Shooter

26-Jul-03 3:26

Okay,
I am doing Conway's Life on my own to get familiar with doing graphic drawing. I have a picture box named world. I have a routine NewView() which will
- create a black pen (death), blue pen (birth), and red pen (living)

I was planning to just draw points on the pictureBox for each point in the 500x500 array area. Unfortunately I am lost as to just how to start out. I know I create my System.Drawing.Pen(Color.Black), etc. and I think I have to create a System.Drawing.Graphic object. But beyond that I'm lost as to the next step to have that Graphic bound to the pictureBox and having the points drawn.

Any help and tutorials that can step me through it (in C#) would be appreaciated!!!

Thanks,
MJ

_____________________________________________
_{The world is a dangerous place.
Not because of those that do evil,
but because of those who look on and do nothing.}

Re: New to graphics drawing.....any assistance?

leppie26-Jul-03 7:42

leppie

26-Jul-03 7:42

theRealCondor wrote:
I know I create my System.Drawing.Pen(Color.Black), etc. and I think I have to create a System.Drawing.Graphic object. But beyond that I'm lost as to the next step to have that Graphic bound to the pictureBox and having the points drawn.

Override the OnPaint method and use the Graphics object provided.

leppie ::AllocCPArticle(Generic DFA State Machine for .NET);

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