C# Discussion Boards - CodeProject

Re: Process.Start() parameter with space char problem

17-Mar-09 1:07

Wrap it in quotes;

Process.Start(@"C:\test.exe", "\"C:\\Temp Dir\\sequence.seq\"");

Enjoy

I are troll Smile | :)

half-life17-Mar-09 1:39

half-life

17-Mar-09 1:39

Thanks alot Smile | :)

Have Fun
Never forget it

how to get out from the outer for

erdem0117-Mar-09 0:16

erdem01

17-Mar-09 0:16

how can i get out from the outer for in a for-for-if situation.
For example
for...
{
for...
{
if...
{
break;
}
}
}

The break only breaks from the inner for, i want it to break from the outer for too.
Could you help.

Xmen Real 17-Mar-09 0:25

17-Mar-09 0:25

you have to break it twice or use goto

for (int a = 0; a < 5; a++)
{
MessageBox.Show(a.ToString());
goto LoopBroke;
}
LoopBroke:
MessageBox.Show("Loop completed");

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%^]*IRXD#@GKCQ`R\^SF_WcHbORY87֦ʻ6ϣN8ȤBcRAV\Z^&SU~%CSWQ@#2
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R0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y<pjxsg-b$f4ia>

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Eddy Vluggen17-Mar-09 0:27

17-Mar-09 0:27

Continue[^] also only breaks a single loop. You could add a flag called 'done', check this in the outer loop, and do a second break if it's true. Or, you use a goto[^].

Disclaimer: the goto suggestion should not be taken seriously Smile | :)

I are troll Smile | :)

Simon P Stevens17-Mar-09 0:29

Simon P Stevens

17-Mar-09 0:29

You can't (See the reply from XMen)

You could consider restructuring the loop to use a while loop instead. You might find if you structure it differently that you don't need the break.

Simon

Eslam Afifi17-Mar-09 0:40

Eslam Afifi

17-Mar-09 0:40

I suggest you go for the goto suggestion. While goto is discouraged, I find it helpful sometimes. It may even simplify the code more than what another structure would do. In this case, IMHO, it will (depending on the context too). A go to will not cost you an extra boolean value and saves an extra if statement.

Eslam Afifi

Pete O'Hanlon17-Mar-09 0:53

17-Mar-09 0:53

Your question shows that you have a misunderstanding of what a for loop actually does. I cringe whenever I see people use break statements inside for loops because it shows they've just gone for convenience without actually considering what they are trying to do.

A for loop is used to iterate a predictable and set number of times; that's what it's for (pardon the pun). If you need to iterate an indeterminate number of times, then you should consider using a boolean based loop structure, i.e. while ... do or do ... while instead (and yes - I know that a for loop is boolean based in that the exit condition is satisfied when you reach the to value in the count). Then, your logic makes more sense because you've based your exit on the condition you're testing.

Please, consider redoing your looping mechanism to a one that's a better fit. Whenever I see people recommending break or goto statements, I know that they are being lazy or have given no thought to what the proper use of the loop should be.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

*Developer Day Scotland - Free community conference Delegate Registration Open

Colin Angus Mackay17-Mar-09 0:58

Colin Angus Mackay

17-Mar-09 0:58

Best answer ever!

Simon P Stevens17-Mar-09 1:30

Simon P Stevens

17-Mar-09 1:30

I've looked really hard, but I can't find a '6' button anywhere, so unfortunately I'm only going to be able to vote you a 5. Sorry about that.

Fantastic.

Simon

Xmen Real 17-Mar-09 2:46

17-Mar-09 2:46

Pete O'Hanlon wrote:
I know that they are being lazy or have given no thought to what the proper use of the loop should be.

Well well well, first of all I'm not lazy... and by reading your answer, people will thing .Net Framework developer were fool because they made 'break'. Perhaps the programmers they use 'continue' are lazy too.
Now, take an example...you need to iterate an array until you got a value hmm... 9. Now how you gonna do

for (int a=0; a < arrayx.Length; a++)
{
if (arrayx[a] == 9)
break;
}

bool foundNine = false;
int index = 0;
while(!foundNine)
{
if (arrayx[index] == 9)
foundNine = true;
index++;
}

I'll always prefer the first one...I dunno about you, it may look you a work of lazy coder.

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Pete O'Hanlon17-Mar-09 2:57

17-Mar-09 2:57

Xmen wrote:
Well well well, first of I'm not lazy

Perhaps not, but you aren't thinking about proper use of language constructs - hence my original comment.

int index = 0;
while (arrayx[index++] != 9)
{
}

That's how you'd do your example - now, you can justify yourself as long as you like but you are promoting a bad practice. Now, let's extend your sample to see why it's bad practice.

bool foundNine = false;
for (int i = 0; i < array.length; i++)
{
  if (array[i] == 9)
  {
    foundNine = true;
    break;
  }
}

if (foundNine && SomeOtherCondition())
{
  DoSomething(array[i]); // Oh, wait a second you can't do this here because you don't know what i is
}

Contrast this with:

int index = 0;
bool foundNine = false;
do
{
  if (array[index] == 9)
  {
    foundNine = true;
  }
  else
  {
    index++;
  }
} while (!foundNine);
if (foundNine && SomeOtherCondition())
{
  DoSomething(array[index]);
}

I don't know about you, but this doesn't feel like such a horrible hack.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

Xmen Real 17-Mar-09 3:00

17-Mar-09 3:00

aha nice done...but 'break' isnt worthless

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Pete O'Hanlon17-Mar-09 3:29

17-Mar-09 3:29

All I ask is that you've considered the alternatives and given some thought to them - there are few absolute rules in programming, but it is important that you can actually justify why you've used a particular construct.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

Xmen Real 17-Mar-09 3:35

17-Mar-09 3:35

Pete O'Hanlon wrote:
All I ask is that you've considered the alternatives and given some thought to them

nope you didnt.
"I cringe whenever I see people use break statements inside for loops because it shows they've just gone for convenience without actually considering what they are trying to do."

"Whenever I see people recommending break or goto statements, I know that they are being lazy or have given no thought to what the proper use of the loop should be."

plus you did unfair, you change the while loop to good one but messed up the for loop

here is mine

bool foundNine = false;
int i = 0
for (; i < array.length; i++)
{
  if (array[i] == 9)
  {
    foundNine = true;
    break;
  }
}

if (foundNine && SomeOtherCondition())
{
  DoSomething(array[i]); // Oh, wait a second I can use it
}

still better than while

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Pete O'Hanlon17-Mar-09 3:42

17-Mar-09 3:42

No it's not. You've now introduced obscurity for maintenance coding. Where's i declared in your loop? Outside - that's where. Your example is now even more confusing, and I'd rip your code apart in a code review if you did that while working for me.

You're not going to convince me that you can come up with a decent reason to ignore the fact that a while loop wouldn't be a better fit here, and it's obvious to me that you aren't willing to consider that your coding practice could possibly be less accurate, so I'm going to break off this discussion now before it becomes he said/she said.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

Eddy Vluggen17-Mar-09 6:04

how can i change the sample rate and sample size of wave files

17-Mar-09 6:04

Pete O'Hanlon wrote:
You've now introduced obscurity for maintenance coding.

I think it's harder to write maintainable code than to write working code. Most of us on this forum work mostly toward the working code.

..and then move on to the next project. Maintenance of the code wasn't (isn't?) a priority in school, and I made a lot of mistakes before my code became even close to being 'readable', let alone easy to maintain.

Where does one learn such things, except by trial and error? Sigh | :sigh:

I are troll Smile | :)

ahmedhassan9617-Mar-09 0:12

ahmedhassan96

17-Mar-09 0:12

hi every body

i want know how can i change the audio sample rate and sample size in wave file

Ex: i have audio files with sample size 16bit
and i want to change it to 8 bit

how can i do this

thanks in advance

VS 2008 - Setup project: Change Link Icon in Program Menu

dj_jeff17-Mar-09 0:10

dj_jeff

17-Mar-09 0:10

I've created a new setup project with Visual Studio 2008 inside my solution and added my .EXE files to the setup.
Then I've created to each .EXE a shortcut and moved it to the user's Program Menu. There I'm able to set the Icons property to an external icon.

Problem: The file and path have always to exist. If I move my solution to another computer, I'm always getting an error of missing icon file.

The Icons itself are stored in the Resources of each project inside this solution and connected to the Application Icon property.

Is it possible to use these resource icons or include them into the setup project ?
If yes, let me know how ? If no, let me also know Wink | ;)

how to catch these events?

abhiram_nayan17-Mar-09 0:01

abhiram_nayan

17-Mar-09 0:01

Can we catch(or overload the event handler) the (Yes, No, Cancel) button click events of Microsoft Excel when the user clicks the Close(X) button on the top right corner of the ms excel workbook? Am basically building an excel automation add-in to ms excel using c#.

Re: how to catch these events?

Eddy Vluggen17-Mar-09 0:50

Re: how to catch these events?

17-Mar-09 0:50

Excel isn't written in C#, and you can't just hook into the code like you would with something that you have written yourself. You can hook into native code, you can get the handle of the buttons of the closedialog and send a click-message, but I don't know if it is possible to hook into the WndProc of Excel.

This is not a simple assignment for the weekend!

I are troll Smile | :)

abhiram_nayan17-Mar-09 1:02

abhiram_nayan

17-Mar-09 1:02

hey Eddy, thanks for replying. I've been scratching my head since...

Basically, I want to create an xml for every excel sheet the user saves and when he reopens the excel sheet, I am supposed to open the corresponding xml. Thus, I used the WorkbookBeforeClose http://msdn.microsoft.com/en-us/library/microsoft.office.tools.excel.workbook_events(VS.80).aspx[^]event and my whole aim is achieved if *the user is saving the sheet first and then closing ms excel*

However, the problem is, when he is trying to save the sheet by: Press the Close(X) button and when the pop up which says "Do you want to save changes to filename.xls? 'Yes' 'No' 'Cancel'" shoots up and IF he is choosing 'Yes' here, am not able to achieve the same. The reason being, the WorkbookBeforeClose event is invoked as soon as he presses the Close(X) button on the top right corner of ms excel.

I want to somehow be able to know whether the user has chosen 'Yes' or 'No' from the pop-up. Can I?! If yes, kindly tell me how?!

Regards.

Re: how to catch these events?

Eddy Vluggen17-Mar-09 1:41