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

Re: How can I delete multiple items from collection?

8-Jul-05 4:20

ArrayList.RemoveRange()

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

Tesic Goran8-Jul-05 4:26

Tesic Goran

8-Jul-05 4:26

Ok. Thanks.

But, how can I do that manually?

Re: How can I delete multiple items from collection?

S. Senthil Kumar8-Jul-05 5:50

S. Senthil Kumar

8-Jul-05 5:50

Iterate through the collection and add the elements you need to delete to another collection. Then iterate over the other collection, calling Remove on the first collection. This is because you'll get a runtime exception if you delete items from the collection on which you are iterating on.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: How can I delete multiple items from collection?

Sean Michael Murphy8-Jul-05 7:14

Sean Michael Murphy

8-Jul-05 7:14

This is the easiest way (pseudocode):

<br />
for(Int32 i = col.Count - 1; i >=0; i--)<br />
   if (ShouldRemove(i))<br />
      col.Remove[i];<br />

This way, the lower collection elements are not affected by the deletions of the higher indexes.

Sean

Dockable Tool Windows

PatteOne8-Jul-05 3:47

PatteOne

8-Jul-05 3:47

Is the functionality of these cool looking Docking Windows integrated in the .NET Framework 2.0?
I wonder why it is used in the MSDN Library and in the Visual Studio 2005 (MSDN Library and Visual Studio 2005) while I didn't find it as a usable component of framework 2.0. Also this way of arranging all the tool windows looks very nice (example)but this doesn't seem to be available either.
I looked through the net and found several self-made docking panels but I'm still searching for the original ones made by Microsoft as used in Visual Studio. Are they available by some ways or not?

help for adding com component

arusmemon8-Jul-05 3:33

arusmemon

8-Jul-05 3:33

Hi,

i am trying to add a com component in C# but the component is not been able to add, i.e. when i try to add, following error is displayed

"Add reference: error adding reference to project"
for additional info, i have a sample sdk that is using the component it is actually developed under VC 6.0 and is using .idl files

is it possible to use this component in C# if possible how,

i am also trying to add the same component in VC(managed)windows component but the problem is still the same

Will some body help me, i will be very thankfull.

Arus.

DataGridBoolColumn Problem

webhay8-Jul-05 2:14

webhay

8-Jul-05 2:14

Hello All,

I am tring to make new table styl with check box columne but the column not apper please see the my code below.

DataGridTableStyle Checkbox = new DataGridTableStyle();<br />
			Checkbox.MappingName = "Billing_CheckBox";<br />
						<br />
			DataGridBoolColumn Bill = new DataGridBoolColumn();<br />
			Bill.MappingName = "Bill_Checkbox";<br />
			Bill.HeaderText = "Billing";	<br />
			<br />
			<br />
<br />
			Checkbox.GridColumnStyles.Add(Bill);<br />
            <br />
			dgTimeCards.TableStyles.Add(Checkbox);

and i bind the datagrid with datasource put it still not working

Please help.
Hay

Robert Rohde8-Jul-05 5:02

Robert Rohde

8-Jul-05 5:02

Looks good. Check that the name of the DataTable really has the name "Billing_CheckBox" and that the corresponding column has the name "Bill_Checkbox".
I assume you use a DataTable otherwise the MappingName of the table style is completely wrong.

webhay8-Jul-05 5:17

webhay

8-Jul-05 5:17

Thanks for your reply

But i am not sure from what you write do you men the columne map name and table map name should be the same. and where i can put the code of the column style.

Regards,
Hay

Alomgir Miah8-Jul-05 6:01

Alomgir Miah

8-Jul-05 6:01

Also make sure The Data Source Property is not readonly. i.e. it should have both get and set.