C# Discussion Boards - CodeProject

24-Oct-05 4:58

Hello,

There is no List class attributes, if I use 1.1 version of .NET framework.
Thank you.

Tom Larsen24-Oct-05 5:22

24-Oct-05 5:22

Well, yes there is no List object in the .Net Framework 1.1. Do you have a question? Smile | :)

There are plenty of objects that implement IList that will behave like a list. Pick the one that is appropriate for your needs.

zaboboa24-Oct-05 5:33

24-Oct-05 5:33

Thanks.

I did not formulate the question properly.;)

Dave Kreskowiak24-Oct-05 6:38

Dave Kreskowiak

24-Oct-05 6:38

zaboboa wrote:
I did not formulate the question properly.

..........................................And that question would be???????????????????????????

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

zaboboa24-Oct-05 7:55

Make a method appear in the properties window

24-Oct-05 7:55

The question was if there is a List class, in 1.1 version.
I pretty much answered my own question.

Thank you.

monteiz24-Oct-05 4:18

monteiz

24-Oct-05 4:18

Hello there,
i am developing a custom TabControl.
Have you seen the standard TabControl? From the properties window one can add or remove tabs...

I want to do the same!

Do you know guys if there is a way to achieve my goal? D'Oh! | :doh:

Montezuma

Re: Make a method appear in the properties window

the last free name24-Oct-05 6:10

the last free name

24-Oct-05 6:10

I think these are called verbs. You can also see them by right-clicking on the control in the design window.

You will need to do some reading on Designers. I would tell you more but I've never used them myself.

Re: Make a method appear in the properties window

monteiz24-Oct-05 22:51

monteiz

24-Oct-05 22:51

Great man,
thanks to your keyword (i would never guess such a biblic name) i have been able to find this article

http://www.codeproject.com/csharp/CustomDesigner.asp

which explains exactly what i want to implement.

Thanks a lot! Smile | :)

Montezuma

Telephone switch machine

Wail A.Salem24-Oct-05 3:45

Wail A.Salem

24-Oct-05 3:45

Hi I am working on a project that uses switch telephone machine and i want to control this machine by using C# if there is any one can help me please >>> Cry | :((

Full path of IsolatedStorageFile

mondolyo7814024-Oct-05 3:34

mondolyo78140

24-Oct-05 3:34

How can i found the full path of my IsolatedStorageFile ?

IsolatedStorageFile.GetStore(IsolatedStorageScope.User | IsolatedStorageScope.Assembly | IsolatedStorageScope.Roaming,null,null);

Thanks

-- modified at 9:41 Monday 24th October, 2005

[serializable] trouble

Sasuko24-Oct-05 2:46

Sasuko

24-Oct-05 2:46

i've used this stuff more and more times in the same project of my application.
Now i've saved a file and i've tryed to open it with another my application that has another namespace.
Now i can't open it.
How can do a free-namespace serializable class?

Re: [serializable] trouble

Matt Gerrans24-Oct-05 5:53

Matt Gerrans

24-Oct-05 5:53

You mean namespace-free, I reckon.

When you serialize an instance of a class, the serialized data is intended to reconstruct an instance of that class, not some other class that happens to have the same name.

Why don't both of the apps use the same namespace and the same class? In other words, maybe you should have a separate library which both apps (the one saving and the one loading) use.

Either that, or you shouldn't be using serialization for this purpose. From what you are saying, it sounds like you may be abusing the idea of serialization and now it is coming back to bite you. Wink | ;)

Matt Gerrans

try - catch problems

zaboboa24-Oct-05 2:22

24-Oct-05 2:22

Hello,

I have a recursive function call, and I want to cathc the StackOverflowException, in case too many stamps of the function are created. Here is my code to catch the exception:

<br />
public decimal startCalculationOfIRR (double[] intArray, decimal rate)<br />
{<br />
 .<br />
 .<br />
 .<br />
<br />
<br />
try {<br />
	                 rate = this.calcIRR(intArray, MINRATE, MAXRATE, rate, prevTotal, increment, counter);<br />
	              } catch (StackOverflowException) {<br />
	                 return -0.00m;<br />
	              }<br />
 return rate;<br />
}<br />
<br />
<br />
public decimal calcIRR (double[] intArray, string MINRATE, string MAXRATE, decimal rate, double prevTotal, decimal increment, int counter)<br />
{<br />
 .<br />
 .<br />
 .<br />
<br />
 return calcIRR (intArray, MINRATE, MAXRATE, rate, total, increment, counter);<br />
<br />
}<br />
<br />

The problem is that the try catch statement does not seem to catch the error, since the program exists with the StackOverflow Exception. Any ideas?

Thank you

AB777124-Oct-05 2:53

AB7771

24-Oct-05 2:53

hi,

catch the exception in the method calcIRR (intArray, MINRATE, MAXRATE, rate, total, increment, counter)

just try this.

i hope this should work for u

Regards,

Pramod

zaboboa24-Oct-05 3:25

24-Oct-05 3:25

Catching the exception within the calcIRR function does not work either.
I just don't know what's going on.

Thanks

AB777124-Oct-05 3:35

AB7771

24-Oct-05 3:35

then try and use the base Exception class instead of
StackOverFlowException

May be this works

Thanks

pramod

zaboboa24-Oct-05 4:09

24-Oct-05 4:09

I already tried to use

catch (Exception), but to no avail. It seems nothing works. It's almost like there is no catch statement at all present.

Thanks

S. Senthil Kumar24-Oct-05 4:44

S. Senthil Kumar

24-Oct-05 4:44

You really shouldn't be coding like this. When a stack overflow exception occurs, there is no guarantee that any additional code will execute, like catch or finally handlers, for example.

You are much better off using iteration instead of recursion.

Regards
Senthil
_____________________________
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zaboboa24-Oct-05 4:56

24-Oct-05 4:56

WIth iteration I have to know basically the number of iteration I must perform. Unfortunately here I don't know that. That is why I used the recursive call.

Thank you.

Tom Larsen24-Oct-05 5:07

24-Oct-05 5:07

What he means is that you should terminate your recursion in a controled manner instead of letting it go bonkers. There should be a point where you know you can't go farther. Why not stop there instead of blindly plowing on? Sometimes the stack will die at 100 frames. Sometimes the stack will die at 1000 frames. You can't glean any useful information from StackOverflowException except the execution couldn't allocate stack. Inferring any other meaning to any exception is of dubious logic.

Tom Larsen24-Oct-05 4:46

24-Oct-05 4:46

Where does it give the location of the StackOverflowException?

zaboboa24-Oct-05 4:55

24-Oct-05 4:55

The location is random, I even pass the counter to see how many times the function is called. Even then, the number is not always the same. Thy funny thing it was working before, all of a sudden it's not working.

Thank you.

Tom Larsen24-Oct-05 5:03

24-Oct-05 5:03

Well that is the nature of overflow exceptions: they depend on the system state you run in which changes over time (resources like memory comes and goes).

Something else is going on then. Are you getting the exception throw from outside your recursive try/catch block? That means the problem is elswhere (or everywhere). Or more specificially, the try/catch block doesn't fail because it can allocate 99% of the thread's stack space but then something else goes off and does something that requires 2% more.

If this is the case you need either need to place the try/catch block "higher" or rethink your design. I would encourage you to rethink your design since terminating your recursion because you ran out of stack is somewhat abnormal and worst not reproducable.

zaboboa24-Oct-05 5:32

24-Oct-05 5:32

Thank you for your input. I will try to rethink some of the steps within the function. Unfortunately, when you are trying to calculate IRR (rate of return), and the function throws an exception (like stack overflow), it does not mean that there is no calculated rate, it's just did not get to the point where it can return the calculated value. I run this function on the array of numbers, which sum reaches into hundreds of millions, and when you trying to calculate the rate of return it sometimes takes 30 iterations, or 100 etc.. That's why I can't really bind myself with iteration limit. Well, I will have to come up with something. Thank you guys anyway it was a great help.