Re: Out of Memory when I Drawing - C# Discussion Boards

8-Jul-05 4:21

Hello fellows

I have a strange problem:

I'm calling a method called DrawXorCircle in my C# application.
When I pass the graphics object of my PaintEventArgs to my Graphics object, appears the following error: "Out of Memory"
In the form class I've create a Draw variable, that I assign to the object "Desenho", created in my form's Paint event
What is happening? Thanks a lot for help
Below, my code:

private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
Draw Desenho = new Draw(e);
Reta = Desenho;
}
public class Draw
{
Pen pColor = new Pen(Color.Blue);
private PaintEventArgs pDes;
public Draw(PaintEventArgs e)
{
pDes = e;
}
public void DrawXorCircle(string sCoordinate)
{
Graphics g = pDes.Graphics;
int iPos = sCoordinate.IndexOf(",");
int iX = int.Parse((sCoordinate.Substring(0,iPos-1)));
int iY = int.Parse((sCoordinate.Remove(0, int.Parse(sCoordinate.Substring(0, iPos)))));
Point p1 = new Point(iX, iY);
Point p2 = new Point(iX+4, iY+4);
g.DrawLine(pColor,p1,p2);
}
}

leppie8-Jul-05 4:24

8-Jul-05 4:24

cutovoi wrote:
DrawXorCircle

When do you call that? Its most likely the Graphics object has been discarded internally after the Draw call.

^{xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots}

Alex Cutovoi8-Jul-05 6:42

8-Jul-05 6:42

I called this guy in my KeyPressEventHandler. I'm at work, so I don't put the code in here. I will write the code searching in my head, so sorry if the code doesn't be ok:

protected void KeyPressEventHandler(object sender, System.Windows.Forms.KeyEventArgs e)
{
if(Connexion.Text != null & e.KeyCode == Keys.Enter)
{
Reta.DrawXorCircle(Connexion.Text);
}
}

well, the code it seems with this guy.

Thanks man to aswer my question. Smile | :)

leppie8-Jul-05 6:50

8-Jul-05 6:50

If you wanna draw like that, you would need to draw on a bitmap, then draw that on the Paint event.

^{xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots}

Alex Cutovoi8-Jul-05 9:54

8-Jul-05 9:54

The place where I Draw is in my form, not in a Bitmap. And because is in the form, my code(I think) is correct.

Guffa8-Jul-05 10:41

Guffa

8-Jul-05 10:41

No, it's not correct.

You store a reference to the graphics object in the draw event, but that is useless once the draw event has ended. You can't use it from the keypress event.

Also, you shouldn't just draw things on the screen. The proper way to do this is to store where you want your graphics drawn, and invalidate the control where you want it drawn, so that new draw events are executed that can draw the graphics. The graphics object that you get in the draw event is clipped and ready to draw exactly the area that is needed so that you don't draw on other windows that might partly overlap your window.

---
b { font-weight: normal; }

Alex Cutovoi9-Jul-05 6:32

9-Jul-05 6:32

thanks man, I understood, thanks to you and leppie

Alex Cutovoi9-Jul-05 6:32

9-Jul-05 6:32

thanks man, I understood, thanks to you and Guffa

S.M.A.R.T. Support

bernardoh8-Jul-05 4:16

bernardoh

8-Jul-05 4:16

How can I access S.M.A.R.T. information and how can I turn it on on disks that do not have it on?
Sorry for asking this, but I googled the hell of it and came home empty Frown | :(

Thanks in advance for any help.

Bernardo Heynemann
Lead Developer / Architect for Core Tech Brazil

Re: S.M.A.R.T. Support

leppie8-Jul-05 4:22

How can I delete multiple items from collection?

8-Jul-05 4:22

bernardoh wrote:
how can I turn it on on disks that do not have it on?

In the BIOS.

^{xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots}

Re: S.M.A.R.T. Support

bernardoh8-Jul-05 4:25

bernardoh

8-Jul-05 4:25

I'm sorry, i meant using C#. I thought it was implicit because of the board I posted in.

Bernardo Heynemann
Lead Developer / Architect for Core Tech Brazil

Tesic Goran8-Jul-05 3:58

Tesic Goran

8-Jul-05 3:58

Hello,

How do I delete multiple elements from collection (array) at once?

I'd like to do that by index.

For example, I want to delete elements with indexes 1, 2, 3 and 4.

If I delete element at index 1, all elements and their indexes will be shifted. That's the problem. I need to delete the elements in compact index section, like: 1,2,3,4 or 7,8,9,10.

Thank you in advance

Goran

Re: How can I delete multiple items from collection?

leppie8-Jul-05 4:20