C# Discussion Boards - CodeProject

3bood.ghzawi2-Feb-10 11:42

2-Feb-10 11:42

very thanks stancrm, but sorry, i really new at C# and don't
understand that........

can you make it more esey ...;
thanks..,

Re: Decryption algorithm

Mycroft Holmes2-Feb-10 11:57

Mycroft Holmes

2-Feb-10 11:57

Here let me help Stan out....

Follow the link to the MSDN article
Read the article to understand what you are doing
Locate the c# sample in the article
Highlight the sample code
Copy it to the clipboard
Open you test application
Locate where you want to work with the sample
Paste the sample into your app
Wire up the events required to test the sample
Create the objects required by the sample (you should understand these needs from reading the article)
Put in a break point in your code
Run the app.
Step through the code and inspect the objects to understand in detail what you are doing.

Wheres the spoon icon!!!!!

Never underestimate the power of human stupidity
RAH

Re: Decryption algorithm

AspDotNetDev2-Feb-10 16:57

AspDotNetDev

2-Feb-10 16:57

That's some good spoon feeding you've got going on there. Laugh | :laugh:

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Re: Decryption algorithm [modified]

Not Active2-Feb-10 11:58

Not Active

2-Feb-10 11:58

3bood.ghzawi wrote:
can you make it more easy

You have been provided with basic cut & paste code to show you how to do it. How much easier do you want it? If you can't understand this example then you shouldn't even be attempting encryption.

I know the language. I've read a book. - _Madmatt

modified on Tuesday, February 2, 2010 6:54 PM

problem of socket programming with local ip

mehrdad3332-Feb-10 8:38

mehrdad333

2-Feb-10 8:38

hi take a look at my codes:

Re: problem of socket programming with local ip

Jimmanuel2-Feb-10 9:29

Jimmanuel

2-Feb-10 9:29

The client has to know where the server is. Period. There's no way that a server could notify the client of its address without the server being previously aware of the client - for the server to be previously aware of the client then the client would have had to have to connected to the server already!

In other words, what you have with localEndPoint2 is unnecessary. In order for the server to notify the client where it is they would already have to be connected and that would mean your problem is already solved.

Usually on the client side the server's IP Address and Port are stored in the application's configuration. Then the server starts up and starts listening on its port, and when the client starts up it reads its configuration and it knows where to connect to.

Badger | [badger,badger,badger,badger...]

Ms Access reports saving to File system in C#

montu33772-Feb-10 8:34

montu3377

2-Feb-10 8:34

Hi,

I have Microsoft Access report in my .mdb file. In this database, i have one report which has attached to one table. From C#.net application,I want to open MsAccess database and get the reports per page and save as .DOC(as word document). Currently issue is that i connected to access database, opened report as well but when i am trying to save it,it's saving without any format like line or table (but on report i have layout like table/lines etc), NOT only that currently it's saving in only one .DOC file. I want to save per page from reports to my C:\test\ drive using C#.

Can someone help me pls.??

Thanks in advance.

Re: Ms Access reports saving to File system in C#

Mycroft Holmes2-Feb-10 12:01

Mycroft Holmes

2-Feb-10 12:01

Let me be the first to point out - using Access as a reporting tool is a REALLY bad idea.

Is there an export function in the Access report, I assume you are using a saveas function?
Can you export a report to word from withing Access?
If so create a macro and follow the steps, inspect the code created y the macro and then duplicate it in your app.

Never underestimate the power of human stupidity
RAH

Bluetooth programming

Jamal Abdul Nasir2-Feb-10 8:31

Jamal Abdul Nasir

2-Feb-10 8:31

hi guyz...

-> i need some good articles or help regarding bluetooth programming in dotnet... i am also searching

the web but i am unable to find good one... plz help me out with this...

thanks...

take care...

J A Nasir K

Re: Bluetooth programming

Ennis Ray Lynch, Jr.2-Feb-10 8:35

Ennis Ray Lynch, Jr.

2-Feb-10 8:35

Bluetooth is basically writing to COM ports so any COM port tutorial will suit your needs, or should.

Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting.

A man said to the universe:
"Sir I exist!"
"However," replied the universe,
"The fact has not created in me
A sense of obligation."
--Stephen Crane

Re: Bluetooth programming

Giorgi Dalakishvili2-Feb-10 23:05

Giorgi Dalakishvili

2-Feb-10 23:05

You can use 32feet.NET[^] library for working with bluetooth.

Also, here is a sample application: Exploring OBEX Devices Connected via Bluetooth[^]

Giorgi Dalakishvili

#region signature
My Articles

Browsing xkcd in a windows 7 way[^]

#endregion

When To Use 'this' in C#

Matt U.2-Feb-10 8:15

Matt U.

2-Feb-10 8:15

So I have been reading through a lot of code lately. That is, code samples and articles and such on CodeProject and elsewhere. And at seemingly random times I notice a method or property is accessed with 'this.' before it. Is there really a rule to using it, or does it make for easy readability depending on the situation? I rarely ever use it and I would like to know if it's bad practice not to. Poke tongue | ;-P

Re: When To Use 'this' in C#

Abhinav S2-Feb-10 8:21

Abhinav S

2-Feb-10 8:21

The this keyword provides access to the current instance of a class.

Information on this here[^].

Me, I'm dishonest. And a dishonest man you can always trust to be dishonest.
Honestly. It's the honest ones you want to watch out for...

Re: When To Use 'this' in C#

OriginalGriff2-Feb-10 8:25

OriginalGriff

2-Feb-10 8:25

You only need to use it to ~~disambiguify~~ tell which variable you actually mean. I.e.

private string parameter;
private void Method(string parameter)
   {
   this.parameter = "Class scope variable";
   parameter = "Method scope variable";
   }

Or when you pass the current instance to a method:

private void Method(MyClass)
   {
   ...
   }
   
private void AnotherMethod()
   {
   Method(this);
   }

Using it unnecessarily just clutters the code and makes it harder to read IMO.

All those who believe in psycho kinesis, raise my hand.

My Badger | [badger,badger,badger,badger...]

's gonna unleash hell on your ass. Badger | [badger,badger,badger,badger...]

tastic!

Re: When To Use 'this' in C#

Matt U.2-Feb-10 10:55

Matt U.

2-Feb-10 10:55

Okay, that makes plenty of sense. Thanks everyone for you input! Big Grin | :-D

Re: When To Use 'this' in C#

Ennis Ray Lynch, Jr.2-Feb-10 8:25

Ennis Ray Lynch, Jr.

2-Feb-10 8:25

Unfortunately, this is a suggested requirement of FXCOP and it is a very poor programming practice. It is my opinion that the over-user of the this keyword came from ignorant programmers who did not know of the keyboard shortcut for intellisense (ctrl + space) these ignorant programmers then went on to define a standard because they wanted code to be "readable" thus it became a standard. It then made it into FXCOP which is a MS tool and then, because it is an MS tool other companies "architects" decided that if MS does it then it must be good. However, MS code rarely, if ever passed through the recommended FXCOP settings without warnings ... to make a long story short:

Don't use this unless you really need to. The only real good time to use the keyword is when calling a method from another object that required a reference to the calling object such as:

public class Foo{

    public Foo(){
        Bar bar = new Bar(this);
    }
}
public class Bar{
    public Bar(Foo foo){}
}

In all other cases where you would be tempted to use the keyword you have inappropriately named your local and member variables. Fix them.

Re: When To Use 'this' in C#

Kevin McFarlane2-Feb-10 10:32

Kevin McFarlane

2-Feb-10 10:32

A lot of MS's generated code uses this.xxx. I don't especially mind it but like you say it's not really necessary. It seems to be a hangover from Java where it appears to be the house style.

Kevin

Re: When To Use 'this' in C#

DaveyM692-Feb-10 12:28

DaveyM69

2-Feb-10 12:28

Kevin McFarlane wrote:
A lot of MS's generated code uses this.xxx

A FormX.Designer.cs is full of it. I guess the principles are:

1. In a container (such as a form) that holds many different objects, explicitly stating the object that you are using a method or property of is probably good practice and leaves no room for ambiguity.

2. It allows for parameters and fields to have the same name (much more likely to occur in auto generated code). If you always access the field with this then there will be no issues in this situation.

Personally, I only use it in my hand written code in case 2 and only where needed.

Dave

Tip: Passing values between objects using events (C#)
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: When To Use 'this' in C#

Kevin McFarlane3-Feb-10 0:08

Kevin McFarlane

3-Feb-10 0:08

Those are good rules of thumb. Smile | :)

Kevin

Re: When To Use 'this' in C#

Mycroft Holmes2-Feb-10 12:08

Mycroft Holmes

2-Feb-10 12:08

I find I use this whenever I refer to a form object ie this.Close() but almost nowhere else, not even when referring to a control on the form, weird!

Still I hated using

Me

in VB whereas this in c# doesn't offend me nearly as much!

Never underestimate the power of human stupidity
RAH

Re: When To Use 'this' in C#

AspDotNetDev2-Feb-10 17:05

AspDotNetDev

2-Feb-10 17:05

Ennis Ray Lynch, Jr. wrote:
keyboard shortcut for intellisense (ctrl + space)

Thanks for the tip! How about this:

// Save keystrokes and confuse other developers.
private SomeType i{get{return this;}}

// Make use of this (aka Me, aka i).
public SomeMethod()
{
    i.Close();
}

$Shucks | :-\$ Poke tongue | ;-P

[Forum Guidelines]

Re: When To Use 'this' in C#

Luc Pattyn2-Feb-10 17:17

Luc Pattyn

2-Feb-10 17:17

aspdotnetdev wrote:
this (aka Me, aka i)

aka notThat

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly formatted, adding PRE tags is the easiest way to obtain that.
[The QA section does it automatically now, I hope we soon get it on regular forums as well]

Re: When To Use 'this' in C#

PIEBALDconsult2-Feb-10 12:37

PIEBALDconsult

2-Feb-10 12:37

I use it to piss people off.

Help with Drawing Polygons

Raztor02-Feb-10 7:51

Raztor0

2-Feb-10 7:51

Hello once again. I just made a program to draw triangles in a way that makes a nice effect, here's a picture:

http://i276.photobucket.com/albums/kk2/Raztor0/Capture.jpg[^]

Now, the way I'm drawing this is I have an array of 80 points which I'm telling C# to draw with the DrawPolygon command. Can you see that line that goes through the middle of the triangles? That line is a line connecting the first and last point in the array, can I somehow prevent C# from connecting that last line? Is there a different command that lets me connect every point in sequence?

Thanks for your time Smile | :)

Re: Help with Drawing Polygons

Luc Pattyn2-Feb-10 8:18

Luc Pattyn

2-Feb-10 8:18

Hi,

a polygon[^] is a closed path by definition, and Graphics.DrawPolygon closes the path for you if you haven't done so yourself. That is all documented in MSDN. The class holds more drawing methods though.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly formatted, adding PRE tags is the easiest way to obtain that.
[The QA section does it automatically now, I hope we soon get it on regular forums as well]

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