Re: C# coding style question - C# Discussion Boards

Gary Wheeler5-Sep-13 1:49

5-Sep-13 1:49

BillWoodruff wrote:
I know there are people who feel an almost "religious zeal" about not using static anything/anywhere, perceiving the use of static whatever as a violation of the No-Globals-Strongly-Typed supreme being

I have a feeling you and I are of a vintage, Bill Smile | :)

. We are grizzled combat veterans of the FORTRAN wars. We remember when men were men,
women created compilers[^], and you knew how to handle globals safely.

Software Zen: delete this;

Re: C# coding style question

BillWoodruff5-Sep-13 18:23

BillWoodruff

5-Sep-13 18:23

Well, I'd be pleased as punch to be of the same vintage as you ... but, I suspect the year of my exfiltration from the womb, 1943, is some ways "off" from your ship-date.

However, I only started messing with computers in 1982 (after my use-by date), and I turned to vinegar early.

I do, though, use 'static anything only in circumstances where I feel there is an absolute need to do so, although I suspect I use them more frequently than the mythical "average" .NET programmer.

bill

Google CEO, Erich Schmidt: "I keep asking for a product called Serendipity. This product would have access to everything ever written or recorded, know everything the user ever worked on and saved to his or her personal hard drive, and know a whole lot about the user's tastes, friends and predilections." 2004, USA Today interview

Re: C# coding style question

Gary Wheeler6-Sep-13 0:48

Gary Wheeler

6-Sep-13 0:48

Hmm. Physically, I'm a mite younger than you, since I was born in 1961. Professionally, I'm older, as I've been working as a programmer since 1980, when I started part-time my sophomore year of college.

Compared to our compatriots here at CP (nice little alliteration there), we're both Jurassic Big Grin | :-D

Software Zen: delete this;

Re: C# coding style question

MarkRHolbrook6-Sep-13 4:40

MarkRHolbrook

6-Sep-13 4:40

Joining the Jurassic crew:

Born: 1957. Wrote first FORTRAN Program: Early 1970. Managed to waste quite a few reams of greenbar paper due to a column or semicolon error. Got job while in Jr. High School punching punch cards for U. Took more FORTRAN. Included my own punch cards in stacks I'd punch on my job. Got in trouble for using computer time as unauthorized user. It worked for a while but I didn't think they would check CPU use that close. Dang.

Played Star Trek on paper terminal at U in mid-70's. Got billed for excessive use of paper (AGAIN). Got access to a Vax first running VMX later converted to Unix. Got first C compiler for it sometime in early 80's. My first C program: Output "shift up/shift down" terminal commands to random VT terminals connected to Vax. I got a little foolish and had the program fork itself about 5 times. Made quite a mess of the input terminals over in the student records department. I had the service guys swapping terminals, changing cables. I feel bad now. It was not the nicest thing to do. Punishment: Had to write professors grade book keeper in C. My grade shot to A and stayed there.

Went to west coast computer fair. Bought Apple I. Loved it. Bought Apple II. Sort of loved it. Hated BASIC so started to program 6502 assembly. Hated that fact the some registers could not be used for some things. Why not!? Got 300 baud modem. Screaming now! Lit up the BBSs. Posted little programs written in 6502 assembly. One of my first was a terminal program lots of people used to send receive files via Xmodem. Used the graphics page of the apple II as a buffer. Watching programs come in was sort of physadellic as it write binary data to the graphics page.

Got 1200 baud modem! So happy! I have speed! Could not talk to any one else for some time. No one else had 1200 baud and 300 was broken in this modem.

Got IMSAI 8080 with broken switches. Fixed switches. Wrote two programs before arthritus began to set into switch toggle fingers. Turned off IMSAI 8080. Never turned it on again.

Got job coding in COBOL. Lasted about 6 weeks. Could not hack it.

Got IBM PC. Wrote loan software in C. Beta tested first ever LAN for IBM PC. Davong or something like that. Man that was fast! I could move a 330k file to my co-workers computer in a minute! Outstanding! No more walking around with stupid 5 inch floppies. Oh yea... 330k at least initialially needed to be put on several floppies. Used Digital Research C compiler. Bug list was 298 pages. Example:

sprintf(). This function converts data from variables into a string using the standard C format string characters.

Erratta: This function does not work. Avoid the use of this function.

Had to write own sprintf, and much of the other "stdlib" in that damned compiler. As soon as compiled program went over 32K segment registers would get messed up and program would crash. Had to patch that too in compiler lib. Learned to hate segmented process architecture.

Got a contract to write a meeting manager system in Digital Research Pascal. Customer owned the compiler so had to use it. Same deal. 300+ pages of things that didn't work. Fought compiler at every turn. Got program runnig with lots of self written "standard library" functions.

One week later friend of mine sends me Turbo Pascal 1.0. Opened it, looked at it. The compiler and editor were 32k. Editor was nice. First real IDE I'd seen. Instructions said hit F "whatever" to compile. Hit it, screen blinked, nothing happened. Great another broken POS compiler. Looked on disk there was my "program" .com file. Hum.... Loaded up my meeting manager. Commented out all the self written patches. Hit compile. Screen blinked on disk was MtgMgr.com. Ran it. It worked perfectly. Every function spot on. No glitches.

Stuck with TP for a while. Did a number of successful contracts in it. Still have some "Delphi" contracts and large projects. Still one of the fastest compilers out there.

During early years of Delphi got a contract doing highspeed A/D acquisition and analysis of a drop tester. They wanted to use Borland C++. Oh man was that ever a slow POS! Every little change gave me time to walk around the building. Wrote the code, got it working using a mini desktop sized drop tester breaking popsicle sticks. Got invited to see it work for real on the "real" drop tester. Standing behind a 3 inch thick plexiglass barrier about 20 yards from a tower almost 50 feet in the air with close to 5 tons loaded on it. They hit the switch and down that damn thing came. The floor jumped about a foot when it hit. It broke a truck axel in half like it was a knife chopping a carrot. On the screen a beautiful little graph appeared of the force along with various computations. Was a good feeling to see something work first time.

Used more C to do a large number of embedded projects. Did embedded assembler as well.

Now working mostly in VS and c#. Love lots about it. Hate some things. But yes... I'm jurassic too. Been around a bunch and done quite a few things.

My motto these days:

KISS first
Then you can OOP, SOLID, DI, and framework to your hearts content.

Re: C# coding style question

Gary Wheeler6-Sep-13 4:53

Gary Wheeler

6-Sep-13 4:53

MarkRHolbrook wrote:
Used the graphics page of the apple II as a buffer. Watching programs come in was sort of physadellic as it write binary data to the graphics page

Reminds me of the graphics machines at school. They were 64K Z-80 systems running CP/M. The lower 48K was bank-switched with the display buffer, so you had to call a routine 'up high' to draw a graphics primitive. It would switch the program memory out and display bank in, draw the point/line/whatever, and then switch the program memory back in. Occasionally the bank switch didn't work properly, and you would end up watching your program on the screen.

Kind of nifty, especially when you'd been in the lab for 40 hours straight subsisting on vending machine coffee and three packs of cigarrettes.

Software Zen: delete this;

Re: C# coding style question

BillWoodruff6-Sep-13 6:02

BillWoodruff

6-Sep-13 6:02

Hi Mark, you are a true "veteran," a true example of technical "ontology recapitulates hardware phylogeny" Smile | :)

I really enjoyed following the course of your pilgrimage in the digital realm. My first computer circa 1981 was a little Radio Shack Color Computer, on which I taught myself 6809 assembly language, and, of cours, Basic. My second computer was a Mac that some very young Jamaican guy in Berkeley, who was a genius with hardware, had got from some bootlegger of rejects Apple intended to go to a recycler, or to be destroyed. Robert fixed it up, and when I bought it, for about US $600 around 1984, it had a Spanish keyboard, and all the second row keys from the bottom were somehow shifted right one character: so that when you typed an "m" you got a comma Smile | :)

thanks, for the memories,

bill

Re: C# coding style question

MarkRHolbrook6-Sep-13 6:09

MarkRHolbrook

6-Sep-13 6:09

Many of us here have been "around". I've read your stories and love every one. It's hard to be 56, have all this experience and my current "director" of software development is about 30. He's a great guy, extremely knowledgable and good at what he does but he lacks the experience people like you and I have had. Doesn't make him a bad person. We all start somewhere. He just has a blank stare on his face when I talk about 300 baud modems. LOL.

Re: C# coding style question

BillWoodruff6-Sep-13 5:51

BillWoodruff

6-Sep-13 5:51

Hi Gary, I am sure our souls are equally eternal, even if I do have more years on the meat-package than you. My career in software was, in the context of the "big picture" of my life, a strange diversion that unfolded by the principles of serendipity's quantum mechanics (and lots of hard work).

People who had known me before my first career, in social work, psychotherapy, and academic social science, were quite astounded that a former mad-poet, and ersatz yogi, from the 1960's cultural topsy-turvy maelstrom ever made it to back to Earth in his thirties, let alone made it into university level academia. They were even more shocked when they heard, I had been published by Addison-Wesley by age 44, and later, I worked at Adobe, at age forty-five, and they saw my name in the about-box of Adobe Illustrator 3.2, and 5.0, or heard I was one of three people who created the proof-of-concept prototype that, later, became Acrobat (under the keen eye, and subtle guidance, of John Warnock, the greatest technical mind I've ever had the privilege of working directly with).

My "true love" is literature, and writing poetry, and fiction, and I'm delighted that about age fifty-one I "re-designed" my life, and moved to Asia, and returned to the worship of the Muses. But, I still enjoy the hell out of programming, still occasionally program, or do web-related stuff, or graphic design, for $, so I have not deserted the shrine of the Goddess Techne.

Along the way: wives (virtual, and legal): six. Children: zero. Ex-wives (legal): two.

Life is as good as I allow it to be !

bill

Re: C# coding style question

Nicholas Marty5-Sep-13 3:26

Nicholas Marty

5-Sep-13 3:26

Just to clarify:

static bool notAvailableOutsideFormClassScope = true;

is in fact NOT private. Neither is it public. The default is internal (scope=assembly). As a default this makes the most sense in my opinion (regardless if having a default makes sense at all)

I still specify the visibility for every class (and member). Just because I don't like relying on defaults Wink | ;)

Edit:
See Access Modifiers (C# Programming Guide) (MSDN)[^] First paragraph of the section "Class and Struct Accessibility"

Edit2:
Regarding Resharper (At least in Version 6.1) you let Resharper suggest explicit access modifiers: Smile | :)

-> Resharper -> Options... -> Code Editing -> Formatting Style -> Other -> Modifiers -> "Use explicit private modifier" / "Use explicit internal modifier"

modified 5-Sep-13 9:35am.

Re: C# coding style question

BillWoodruff5-Sep-13 18:32

BillWoodruff

5-Sep-13 18:32

Hi Nicholas, that's a very interesting, and appreciated, response, thanks.

I am definitely a devotee of the cult whose mantra is: "declared accessibility keeps you virgin."

I studied the MSDN page you kindly sent me a link to: the word 'static does not appear in it; the distinction between 'private and 'internal mentioned there applies to classes, and structs: "Classes and structs that are declared directly within a namespace (in other words, that are not nested within other classes or structs) can be either public or internal. Internal is the default if no access modifier is specified." The example I showed uses variables. But, I did find that page worth studying, and bookmarking, for future reference !

Given these two declarations in a Form class' scope:

static bool notAvailableOutsideFormClassScope1 = true;
private static bool notAvailableOutsideFormClassScope2 = true;

There is no difference in accessibility/behavior outside/inside the Form class' scope.

I've actually gone to the trouble, just to make sure, of testing (code on request) if there's any difference in accessibility/behavior.

In externally declared classes, one static, the other public, neither the static class, or the public class, can access those static bool, form class' scoped, variables. As you would expect, both the static class, and an instance of the public class created in the Form's scope, where those variables are declared, can use/access (set, get) those variables.

So, I see no evidence for your assertion that a static variable declared without access-modifier is, by default, 'internal, and not 'private.

ReSharper 8: Resharper/Options/Code Editing/C#/Formatting Style/Other/Modifiers dialog ... I note that I have both options, "Use explicit internal modifier," and "Use explicit private modifier:" enabled.

The default behavior in ReSharper 8, with these options enabled, is to prepend the 'private access-modifier for a static variable, after you type it.

bill

modified 6-Sep-13 1:29am.

Re: C# coding style question

Nicholas Marty5-Sep-13 20:54

Nicholas Marty

5-Sep-13 20:54

Hm... Very interesting Bill Thumbs Up | :thumbsup:

Had to test it myself too now Smile | :)

It looks like the default access modifier is only internal for classes and structs, while it is private for class members (Variables, Methods, etc.). So I was wrong in the first place Blush | :O

(considering the topic/examples were about variables). Looks like a lack of consistency to me. A reason more for me to dislike those defaults Wink | ;)

I've never noticed that as I always write the access modifier to be clear of my intentions.

As far as I can see, the default value should be sufficient in most cases to be able to use your class without any explicit modifiers. private makes usually no sense for a class (as you won't be able to use it anywhere except the top level class "possessing this class) and internalallows enough for usage in you application. if you want to expose it more you can still change it to public. A default of private for class members also seems reasonable given that you usually want fields to private (and probably a bunch of class methods too).

BillWoodruff wrote:
The default behavior in ReSharper 8, with these options enabled, is to prepend the 'private access-modifier for a static variable, after you type it.

You should also be able to change the order of the modifiers on the following line Smile | :)

Re: C# coding style question

BillWoodruff6-Sep-13 4:35

BillWoodruff

6-Sep-13 4:35

Hi Nicholas,

I am curious now: in what circumstances have you ever used a static class, struct, or fields, or method, defined in the scope of a Form's class, and either made it private by declaring it private, or let it become private by default when you left off the access-modifier ?

I have never found a reason to do that, myself, but I suspect there are reasons for doing it under some circumstances that I'm not aware of ... and, I'd like to be aware of what possible use a private static something-or-other could be !

fyi: I went into ReSharper 8, and changed the modifier list so 'internal was at the top of the list. Declaring a static boolean variable in a Form: ReSharper 8 prepended the 'private access-modifier as soon as I completed the declaration.

It is good to learn new things, and it is good to have cause to question what one takes for granted, so I thank you for motivating me to revisit these aspects of .NET Smile | :)

yours, Bill

Re: C# coding style question

Nicholas Marty6-Sep-13 5:15

Nicholas Marty

6-Sep-13 5:15

Hey Bill

BillWoodruff wrote:
I am curious now: in what circumstances have you ever used a static class, struct, or fields, or method, defined in the scope of a Form's class, and either made it private by declaring it private, or let it become private by default when you left off the access-modifier ?

There are things where it makes sense to declare something as private static. And I guess if you let it default let it become private or you explicitly declare it as private is just a preference... Where mine is to explicitly tell me and everyone else which visibility I am aiming for (private, internal, protected or public).

In our code the tracer for Log4net is declared as such. Because you want to be able to log in both static and non-static methods through it, but you don't want any other class to log through that same logger.

So in this case: The tracer instance of the form is declared as private static. So you're able to use the tracer in methods of the form to log information. Sure, as long as you don't need static methods in the form class you could also declare it without the static modifier. However the tracer is declared in every class in the same manner so why bother to change it and change it back when you happen to use the instance in a static method?

I don't know about other usages for such a thing on top of my head but I guess there might be some Wink | ;)

BillWoodruff wrote:
fyi: I went into ReSharper 8, and changed the modifier list so 'internal was at the top of the list. Declaring a static boolean variable in a Form: ReSharper 8 prepended the 'private access-modifier as soon as I completed the declaration.

Yeah, there are a lot of options for Resharper. But I like it because I don't have to think about formatting my code Poke tongue | ;-P

yours, Nicholas

Re: C# coding style question

PIEBALDconsult5-Sep-13 3:39

PIEBALDconsult

5-Sep-13 3:39

Well if all you're writing is front-end stuff, then you wouldn't have many public members anyway. I write mostly back-end library stuff so a great many of my members are public static methods, but not many fields.

A few examples:

public static readonly System.Type BaseType = typeof(T) ;
public static readonly Rational MaxValue = new Rational ( decimal.MaxValue , 1M ) ;
public static event ErrorDelegate OnError ;
public static ValueOf<T> operator + ( ValueOf<T> Op1 , ValueOf<T> Op2 ) ...
public static System.Reflection.PropertyInfo CommandTextAttributeProperty { get ; private set ; }

Consistency allowed me to find these easily.

Re: C# coding style question

Rakesh Meel4-Sep-13 20:48

Rakesh Meel

4-Sep-13 20:48

i suggest frist one style.

Re: C# coding style question

Ricardo Kajihara4-Sep-13 21:33

Ricardo Kajihara

4-Sep-13 21:33

I always like to use the access modifier first.

Re: C# coding style question

Christopher Kenis5-Sep-13 1:04

Christopher Kenis

5-Sep-13 1:04

I'm with Richard Deeming here, I use the first method myself. As Richard said, consistency is the key!

Re: C# coding style question

Eytukan5-Sep-13 7:21

Eytukan

5-Sep-13 7:21

public static is more poetic. We've been using it for a decade now. Why change it? Blush | :O

Starting to think people post kid pics in their profiles because that was the last time they were cute - Jeremy.

Re: C# coding style question

BillWoodruff5-Sep-13 18:35

BillWoodruff

5-Sep-13 18:35

Vunic wrote:
public static is more poetic.

Just curious: is private static any less poetic ?

bill

Re: C# coding style question

Eytukan5-Sep-13 19:02

Eytukan

5-Sep-13 19:02

Private static is still poetic.

Just static public, static private looked reverse-poetic. Smile | :)

Starting to think people post kid pics in their profiles because that was the last time they were cute - Jeremy.

Re: C# coding style question

V.6-Sep-13 1:48

6-Sep-13 1:48

First one... always.

V.

(MQOTD Rules and previous Solutions )

Thread Progress Bar

juliogyn4-Sep-13 8:31

juliogyn

4-Sep-13 8:31

I have this code:

public void mtdProgressbar() {

            prgsBar.IsIndeterminate = false;

            prgsBar.Orientation = Orientation.Horizontal;

            prgsBar.Minimum = 0;

            prgsBar.Maximum = short.MaxValue;

            prgsBar.Value = 0;

            double value = 0;

            prgsBar.Visibility = Visibility;

            UpdateProgressBarDelegate updatePbDelegate = new UpdateProgressBarDelegate(prgsBar.SetValue);

            do
            {
                value += 1;

                Dispatcher.Invoke(updatePbDelegate,   System.Windows.Threading.DispatcherPriority.Background,new object[] { ProgressBar.ValueProperty, value });
            }
            while (prgsBar.Value != prgsBar.Maximum);

            prgsBar.Visibility = Visibility.Hidden;
        }

But i can not create the Thread do fill progressbar, do not work.
The code:

.
.
. 
else{
System.Threading.Thread trd = new System.Threading.Thread(new System.Threading.ThreadStart(this.mtdProgressbar));
                trd.IsBackground = true;
                trd.Start();
mtdTest(); //this method contains only loop for,represents an operation that requires the progressbar
}

I'm using C# and Wpf

Re: Thread Progress Bar

Forbiddenx4-Sep-13 9:01

Forbiddenx

4-Sep-13 9:01

Threads can be tricky, what you are running into is a problem with access.. threads by default can not access the ui to update a progress bar because that may create a deadlock.

For the background worker there is a function built in for report progress, but it is limited to only allow for simple updates.

You can however, get around this requirement by doing
.Invoke((Action)delegate() which allows safe access to the ui through a delegate.

I have used this method to update multiple labels, etc.

That should do the trick.

Re: Thread Progress Bar

BillWoodruff4-Sep-13 17:23

BillWoodruff

4-Sep-13 17:23

Forbiddenx wrote:
You can however, get around this requirement by doing

.Invoke((Action)delegate() which allows safe access to the ui through a delegate.

Hi, isn't the OP already doing this in his code:

do
{
    value += 1;

    Dispatcher.Invoke(updatePbDelegate,   System.Windows.Threading.DispatcherPriority.Background,new object[] { ProgressBar.ValueProperty, value });
}

?

Of course, the OP didn't disclose the code for 'updatePbDelegate, or show where it's created. In this case I think the problem is elsewhere (see Dave K.'s response).

Re: Thread Progress Bar

Forbiddenx6-Sep-13 1:16

Forbiddenx

6-Sep-13 1:16

Yes, I do see invoke but it does not look like its used correctly.

It looks to me like his code is trying to access the progress bar ui directly and outside of the invoke.
It looks like he is setting a lot of values, my guess is some of those values are on the ui and that is what is crashing everything.

I think he is going to have to re-write how this works..

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.