C# Discussion Boards - CodeProject

Text

totig18-Jul-03 0:03

totig

18-Jul-03 0:03

Firstly, what is the best way to delete some text. What I want is the number "563.5423" to become "563.54".

Re: Text

A.Wegierski18-Jul-03 2:07

A.Wegierski

18-Jul-03 2:07

See Remove or Substring or Replace methods of string object

Hi,
AW

How can i make a tabpage unvisible in tabcontrol?

Xytme17-Jul-03 23:48

Xytme

17-Jul-03 23:48

when i use tabcontrol,i find that there is no property for the tabpage to visible or unvisible.i want make tabpage1 to visible but tabpage2 to unvisible,but beacause there some progress need controls on tabpage2,so i can remove tabpage2,i just want to make it unvisible.how can i make that?
thanks

Re: How can i make a tabpage unvisible in tabcontrol?

A.Wegierski18-Jul-03 2:03

A.Wegierski

18-Jul-03 2:03

Only by removing/adding from Controls

Hi,
AW

FillPolygon problem?

r917-Jul-03 22:58

17-Jul-03 22:58

I have a figure that I want to fill with black color, but it don't work!!

private void button11_Click(object sender, System.EventArgs e)
{

System.Drawing.Graphics formGraphics = null;
System.Drawing.Pen myPen;
formGraphics = pictureBox7.CreateGraphics();
myPen = new System.Drawing.Pen(System.Drawing.Color.Black,1);

formGraphics.DrawLine(myPen, 4, 4, 50, 4);
formGraphics.DrawLine(myPen, 4, 4, 4, 100);
formGraphics.DrawLine(myPen, 50, 4, 50, 100);
formGraphics.DrawLine(myPen, 4, 100, 27, 120);
formGraphics.DrawLine(myPen, 50, 100, 27, 120);

SolidBrush Brush = new SolidBrush(Color.Black);
Point point1 = new Point(4, 4);
Point point2 = new Point(50, 4);
Point point3 = new Point(4, 4);
Point point4 = new Point(4, 100);
Point point5 = new Point(50, 4);
Point point6 = new Point(50, 100);
Point point7 = new Point(4, 100);
Point point8 = new Point(27, 120);
Point point9 = new Point(50, 100);
Point point10 = new Point(27, 120);

Point[] curvePoints = new Point[]
{
point1,
point2,
point3,
point4,
point5,
point6,
point7,
point8,
point9,
point10,
};
formGraphics.FillPolygon(Brush, curvePoints);

myPen.Dispose();
formGraphics.Dispose();

}

Any idea?

Initializing a color poperty in c#

mrpink17-Jul-03 22:40

mrpink

17-Jul-03 22:40

So I'm doing something like :

[Category("Visual"),
DefaultValue(XXXX)
]
public Color MyColor { get{..} set{..} }

What should I put in XXX to get my color initialized correctly .. whatever I put in it, I get a wrong value or color !!

Cheers,
MrPink

Re: Initializing a color poperty in c#

Mazdak18-Jul-03 2:25

Mazdak

18-Jul-03 2:25

Color.Black is what you want?

Mazy

No sig. available now.

Re: Initializing a color poperty in c#

mrpink18-Jul-03 5:41

mrpink

18-Jul-03 5:41

Well,
[
...
DefaultValue(Color.Black),
]

Does not work Frown | :-(

Re: Initializing a color poperty in c#

J. Dunlap18-Jul-03 8:55

J. Dunlap

18-Jul-03 8:55

What about:

[
  ...
  DefaultValue(KnownColor.Black),
]

"Blessed are the peacemakers, for they shall be called sons of God." - Jesus

"You must be the change you wish to see in the world." - Mahatma Gandhi

Loop though XML

eggie517-Jul-03 19:40

eggie5

17-Jul-03 19:40

Let me rephrase the question...

/\ |_ E X E GG

Re: Loop though XML

John Fisher18-Jul-03 4:32

John Fisher

18-Jul-03 4:32

Were you going to rephrase the question in this post or another one?

John

"We want to be alone when we hear too many words and we feel alone when it has been a while since anyone has spoken to us." Paul David Tripp -- War of Words

Re: Loop though XML

Ista21-Jul-03 17:19

Ista

21-Jul-03 17:19

funny he lost the thought

Re: Loop though XML

eggie521-Jul-03 17:23

eggie5

21-Jul-03 17:23

NO. I'm just to damn fustrated with this stupid little thing I need my program to do....

and I don't know how to do it...

it's dumb...

I don't know how...

and I just want someone else to do it...

/\ |_ E X E GG

Re: Loop though XML

Ista22-Jul-03 3:15

Ista

22-Jul-03 3:15

then show the xml and describe what your trying to do

Memory Management

Gaurika Wijeratne17-Jul-03 19:39

Gaurika Wijeratne

17-Jul-03 19:39

Memory Management

I am using mid form in a windows forms application. Every time I am loading new child windows memory is going up(it’s ok). When I close them memory is not coming down. I am disposing child windows as they close.

Why is this happening ?

What is the solution for this problem ?

What are the best practices for memory management.

Thanks
Gau

Gaurika Wijeratne. //
www.gaurika.com

Every Compounded thing is impermanent

Re: Memory Management

apferreira18-Jul-03 5:10

apferreira

18-Jul-03 5:10

If you are using task manager to detect memory usage, what you are seeing is the programs working set and not the atuall memory usage.

You say you are using the Dispose method as you close windows. But do those child windows use any resources that are not automatically disposed?

Contrary to popular belief, .NET's automaticall memory management does not imply immediate 100% resource cleanup. Some resources have to be cleaned up manually to decrease memory footprint at any given time since the garbage collector funtions in a non-deterministic way.

Re: Memory Management

Gaurika Wijeratne18-Jul-03 7:22

Gaurika Wijeratne

18-Jul-03 7:22

I don’t have any other resources in them . say if I have 20 child windows even after I close all of them, Task Manager dose not reflect it , till I close the MDI main.

Is Task Manager showing the correct memory ?

Any other tool to track memory ?

Gaurika Wijeratne. //
www.gaurika.com

Every Compounded thing is impermanent

Re: Memory Management

apferreira19-Jul-03 2:55

apferreira

19-Jul-03 2:55

Task manager show the program's working set, not the actual memory consumption at a given time. You can see this bi minimizing and then restoring your application. Task Manager refreshes the value and usually the new value is much less than the original one.

Although it is not a recommended practice, you can try forcing a garbage collection through GC.Collect().

Also, try this MSDN link:

http://msdn.microsoft.com/netframework/downloads/samples/default.aspx?pull=/library/en-us/dndotnet/html/dotnetperftips.asp[^]

systray question

KETUINHA17-Jul-03 18:01

KETUINHA

17-Jul-03 18:01

how to minize and close form into system tray (application running)

help me!!!

Nho'c ti`

Re: systray question

Mazdak18-Jul-03 2:19

Mazdak

18-Jul-03 2:19

You have to use NotifyIcon . For more information search it in CP. There is a article about it.

Mazy

No sig. available now.

How to Create a new Access database using C#?

Xytme17-Jul-03 17:41

Xytme

17-Jul-03 17:41

How to Create a new Access database using C#?
i want create a new access database.i don't kown how to write the SQL expression.
and i want to kown is there other way to create a new database not use SQL language.beacause i kown there is ADOX in ado2.5 and it can create database.but i can't find anything can create database in ado.net.
thanks.

Re: How to Create a new Access database using C#?

Kastro17-Jul-03 18:10

Kastro

17-Jul-03 18:10

I'm interested in knowing too.

The only other technique I know, and have used before, is to embed a blank database into the assembly and write it out to file using a binary stream whenever a new database is needed. I know, its ugly and bad, but it works. Though if you want to be able to create for different Access versions you'd need to embed each one, which is even more ugly and bad.

Also, you can use Interop to access ADOX from C#.

Re: How to Create a new Access database using C#?

Mazdak18-Jul-03 2:23

Mazdak

18-Jul-03 2:23

I think you have to send SQL statement to Access. (CREATE DATABASE) You can do it in this way with ado.net.

Mazy

No sig. available now.

background is not transparent !!

KETUINHA17-Jul-03 17:04

KETUINHA

17-Jul-03 17:04

Hallo all

I add some Image into ImageList , and Append it to ToolBar, but I can't remove Image background

somebody help me, please

Nho'c ti`

SML GHETTO STEEZ

eggie517-Jul-03 14:40

eggie5

17-Jul-03 14:40

Here's my ghetto xml (byteFile1.xml)...

<?xml version="1.0"?>
     <Bytes>
          <byte1>
               <one>00</one>
               <two>01</two>
               <three>02</three>
               <four>03</four>
               <five>04</five>
               <six>05</six>
               <seven>06</seven>
               <eight>07</eight>
          </byte1>
          <byte2>
               <one>21</one>
               <two>15</two>
               <three>12</three>
               <four>11</four>
               <five>05</five>
               <six>01</six>
               <seven>08</seven>
               <eight>04</eight>
          </byte2>
          <byte3>
               <one>02</one>
               <two>00</two>
               <three>10</three>
               <four>18</four>
               <five>81</five>
               <six>05</six>
               <seven>06</seven>
               <eight>07</eight>
          </byte3>
     </Bytes>

now here's the code I process it with...

int nOutNum;

XmlDocument xmlDoc=new XmlDataDocument();
XmlNode bit;
string NUM;
xmlDoc.Load("byteFile1.xml");
bit=xmlDoc.SelectSingleNode("//Bytes/byte1");
NUM=bit.InnerText;

this.labelCell.Text=NUM;


nOutNum=short.Parse(NUM, NumberStyles.AllowHexSpecifier);
NTPort.Outport(nAddress, (short)nOutNum);

Now, what I want to do is go though each node i.e. (one, two, three.... eight) one at a time, and on each one do the above code.

but make ....

bit=xmlDoc.SelectSingleNode("//Bytes/byte1");

unique to the specific node were on in the loop...

like if were on the one in bold...

<byte1>
     <one>00</one>
     <big><two>01</two></big>
     <three>02</three>
     <four>03</four>
     <five>04</five>
     <six>05</six>
     <seven>06</seven>
     <eight>07</eight>
</byte1>

then change it to...

bit=xmlDoc.SelectSingleNode("//Bytes/byte1/two");

so, it sounds reall confusing... I think all I need is a for loop or somthing... but the changing of the SelectSingleNode thing ruins me...

PLEASE HELP@!@!#@$K Blush | :O

/\ |_ E X E GG

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