C# Discussion Boards - CodeProject

10-Jun-08 0:12

Vote my response.

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
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"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

trailing zero in Decimal

George_George9-Jun-08 0:21

9-Jun-08 0:21

Hello everyone,

Mentioned here,

http://msdn.microsoft.com/en-us/library/system.decimal(VS.80).aspx

What means "The scaling factor also preserves any trailing zeroes in a Decimal number"? Could anyone show me a sample please?

thanks in advance,
George

Ashfield9-Jun-08 1:26

Ashfield

9-Jun-08 1:26

It means simply that it will not chop off any trailing zeros from your number i.e. 12.450 does not become 12.45

Hope that helps

Bob
Ashfield Consultants Ltd

George_George9-Jun-08 1:41

9-Jun-08 1:41

Thanks Bob,

Your sample pretty well demonstrates what means "preserves any trailing zeroes", but I am confused about what means "scaling factor also preserves" here?

BTW: I have the background of how Decimal and float are stored internally, but I do not know how could we utilize scale (I think it is the exponent) to preserve zero?

regards,
George

Ashfield9-Jun-08 2:57

Ashfield

9-Jun-08 2:57

As I said originally, it preserves the number of decimal places. A quick look at MSDN for decimal says "The scaling factor specifies the number of digits to the right of the decimal point; it ranges from 0 through 28"

Bob
Ashfield Consultants Ltd

George_George9-Jun-08 16:06

What is position of .Net winform developer in developers market?

9-Jun-08 16:06

Thanks Bob,

From the link,

http://msdn.microsoft.com/en-us/library/system.decimal(VS.80).aspx[^]

I can not find "The scaling factor specifies the number of digits to the right of the decimal point; it ranges from 0 through 28", could you post the link where you find the statement you quoted please? Smile | :)

I want to read more.

regards,
George

Abdul Gafoor9-Jun-08 0:13

Abdul Gafoor

9-Jun-08 0:13

Hi,

Is the .Net winform development is competitive tool for windows system programing???? [Unsure] really? What is position of .Net winform developer in developers market? Is C# being preferred over c/c++ by any developer any point of time for system programming , embedded system programming?

Re: What is position of .Net winform developer in developers market?

Gareth H9-Jun-08 0:24

Gareth H

9-Jun-08 0:24

Abdul Gafoor,

This might help you[^]

Regards,
Gareth.

(FKA gareth111)

Re: What is position of .Net winform developer in developers market?

rah_sin9-Jun-08 0:25

rah_sin

9-Jun-08 0:25

check out following link
www.tiobe.com/tiobe_index/index.htm[^]

rahul

Re: What is position of .Net winform developer in developers market?

#realJSOP9-Jun-08 2:46

9-Jun-08 2:46

Any Microsoft programming skills you have are marketable, so pick the one you like.

Second, .Net is more than just WinForms. If you limit yourself to that, you may as well get a job flipping burgers instead.

Timer Controll in Thread

DeepOceans8-Jun-08 23:51

DeepOceans

8-Jun-08 23:51

Hello
I m developing a window application. I m doing diferent tasks against different events using multi-threading. Against 1 thread , I m enabling the timer, and against its function I m performing 1 task, but it is not working i.e it is not executing the timer function. if I put all the code against some button rather than within thread , then it works well.
plz tell me how could I use the Timer within the thread.
here is my Code.

private void Start_Click(object sender, EventArgs e)
{

pthrd = new Thread(new ThreadStart(Thrd1));
pthrd .Start();

}
void Thrd1()
{
MessageBox.Show("Thread Start");
timer1.Enabled = true;
}

private void timer1_Tick(object sender, EventArgs e)
{
MessageBox.Show("Start Grabbing");
Calculate();
}

Shanzay

Gareth H9-Jun-08 1:04

Gareth H

9-Jun-08 1:04

DeepOceans,

I am not sure if this is correct, but i think its because the thread does the work and then exits, thus the timer will be told to start but then instantly quick, thus it never ticks.

Since i am not sure if my thinking is correct, i dont have a solution other than to keep the thread alive.

Whats the reason you want to run a Timer in the background anyways?

Regards,
Gareth.

(FKA gareth111)

DeepOceans9-Jun-08 1:22

DeepOceans

9-Jun-08 1:22

I m using Timer to enable my function for grabbing the video frames on every tick. yes u might b right that thread does its work and exits but in my case it never actually goes in the function (i checked by printing a messegeBox). i already gave the code. plz try it and tell me more specific reason.
Thanku so much !

Shanzay

#realJSOP9-Jun-08 2:51

9-Jun-08 2:51

Your thread function should look something like this:

private void Thrd1()
{
    // just sit and spin
    while (true)
    {
        // sleep for the desired time - this example uses 1 second
        Thread.Sleep(1000);
        
        Calculate();
    }
}

private void Calculate()
{
    // do some work
}

BTW "Thrd1" is a crappy function name.

PIEBALDconsult9-Jun-08 5:51

PIEBALDconsult

9-Jun-08 5:51

The Timer uses a thread, so you needn't use your own as well.

#realJSOP9-Jun-08 5:54

9-Jun-08 5:54

But using a thread is more programmerish.

The Timer class is for lazy people.

Smile | :)

PIEBALDconsult9-Jun-08 13:41

PIEBALDconsult

9-Jun-08 13:41

Certainly, but using both at once is nuts.

#realJSOP10-Jun-08 0:11

serialize atextbox control

10-Jun-08 0:11

Agreed.

Elesh8-Jun-08 23:41

Elesh

8-Jun-08 23:41

how to serialize a windows form control (binay or xml serialization) ?

Re: serialize atextbox control

ncjlee9-Jun-08 0:33

ncjlee

9-Jun-08 0:33

[Serializable]
private System.Windows.Forms.Button button1;

at the form.designer.cs code..

modified on Saturday, January 17, 2009 8:11 AM

ListBox throwing a "Not valid value"-exception

Gadjuka8-Jun-08 23:14

Gadjuka

8-Jun-08 23:14

Hi all!

I'm having a problem with checkedlistbox.
At one point I want to update the data associated with the selected item, which is a struct I defined. When I try to do this I get an error:
"Specified argument was out of the range of valid values.Parameter name: '-1'is not a valid value for 'index'"
And then the last item in the list is removed.

CheckedListBoxItem temp = (CheckedListBoxItem)clbFormats.Items[clbFormats.SelectedIndex];
temp.Update = chkUpdate.Checked;
clbFormats.Items[clbFormats.SelectedIndex] = temp;	// <-- This is where it raises an error

The thing is that clbFormats.SelectedIndex isn't -1, it's 0 if I add it to the watch window. And if I do that same with clbFormats.Items[clbFormats.SelectedIndex] it also shows the correct, valid values.
And what's even stranger is that this code works if I compile it in VS2005, unfortunately I have to use VS2003.

/Gadjuka

Re: ListBox throwing a "Not valid value"-exception

#realJSOP9-Jun-08 2:57

Re: ListBox throwing a "Not valid value"-exception

9-Jun-08 2:57

Why don't you just do this:

clbFormats.SetItemChecked(cblFormats.SelectedIndex, chkUpdate.Checked);

Gadjuka9-Jun-08 20:02

Gadjuka

9-Jun-08 20:02

Thanks for the suggestion, unfortunately that won't work.
The CheckedListBox-items and the CheckBox are independent, but for each ListBox-item I need to remember whether the CheckBox was checked when that item was selected.

That's why I need to be able to update the Data associated with each ListBox-item.

Re: ListBox throwing a "Not valid value"-exception

#realJSOP10-Jun-08 0:10

SortedDictionary v.s. Dictionary

10-Jun-08 0:10

I truly dislike wasting my time.

When you ask a question here, clearly state all of your requirements in your original message. Finding the answer you want will require at least 30 minutes. Of course, you're a programmer too (or maybe not), and that's how long it should take YOU to work this out on your own.

George_George8-Jun-08 22:41