Re: C# vs C++ - C# Discussion Boards

codenoobie1-Mar-10 19:36

1-Mar-10 19:36

Hi guys, I've tried to add a prompt to display a dialog box when the user pressed a button, it seems an error surfaced when I run the program. The error showed, "no overload for method "Show" takes '3' arguments." May I know what went wrong, any help would be appreciated. Thanks in advance =) Here is the code snippet below.

if (MessageBox.Show("Are you sure?","Save data", MessageBoxButtons.YesNo) == DialogResult.Yes)
   {
      //Do tasks
   }

Re: Dialog Box

rah_sin1-Mar-10 19:53

rah_sin

1-Mar-10 19:53

i think fourth argument MessageBoxIcon is missing

rahul

Re: Dialog Box

codenoobie1-Mar-10 20:33

codenoobie

1-Mar-10 20:33

Hi Rahul, thanks for replying, does it look something like this when I added the fourth argument? I've tried it, but the error still surfaced and this time it shows, "No overload for method 'Show' takes '4' arguments.

if (MessageBox.Show("Are you sure?", "Confirm save?", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
     {
          //Do tasks

                }

Re: Dialog Box

codenoobie1-Mar-10 20:46

codenoobie

1-Mar-10 20:46

Hi Rahul, I think I've done it. After adding the next argument, "MessageBoxDefaultButton", the prompt worked, thank you so much =)

Re: Dialog Box

OriginalGriff2-Mar-10 0:01

OriginalGriff

2-Mar-10 0:01

If you need to check something like this again, place the cursor after the open brace of the method, and use CTRL+space - this makes IntelliSense show you the various possible overloads for any documented method, including your own. Use Cursor Up and Down to scroll between them.

You should never use standby on an elephant. It always crashes when you lift the ears. - Mark Wallace

C/C++ (I dont see a huge difference between them, and the 'benefits' of C++ are questionable, who needs inheritance when you have copy and paste) - fat_boy

Re: Dialog Box

DX Roster4-Mar-10 18:42

DX Roster

4-Mar-10 18:42

First of all i want to tell you that in Web form there is no option for message box its available in window form but if you still want to use message box then write this code:

using system.window.form.*;

and perform this change

if (System.WindowForms.MessageBox.Show("Are you sure?","Save data", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
//Do tasks
}

C# vs C++

jekak1-Mar-10 19:22

jekak

1-Mar-10 19:22

Hi

I have some project that behave like emule,edonkey etc.

now I need to get decision about technology and language

the project bigest and significant part its Networking and Security.

I'm c# developer(vever worked with c++).

Now I need to decide how to develop this project c? c++? c#?

any suggestion ?

thnks
Jeka

Re: C# vs C++

N a v a n e e t h1-Mar-10 20:10

N a v a n e e t h

1-Mar-10 20:10

That is a subjective question.

jekak wrote:
I'm c# developer(vever worked with c++).

Since you know C#, answer is very obvious.

.NET framework comes with good networking related classes and those are very straightforward to use and their socket implementation is quite good. If you are using C++ or C, you need to find a good socket implementation and other networking libraries or write your own. This can be time consuming as you don't have any experience on these languages. If you are still interested in C++, take a look at POCO[^], they have got nice networking libraries.

Is emule open-source?

Smile | :)

Best wishes,
Navaneeth

Re: C# vs C++

jekak1-Mar-10 20:22

jekak

1-Mar-10 20:22

N a v a n e e t h wrote:
NET framework comes with good networking related classes and those are very straightforward to use and their socket implementation is quite good

of course you right!!!

But Now I'm trying to be "Diablo Advocate" and to understand all pro and cons

of using C++ vs C#.

my App going to be very corelated to HardWare Network so maybe better solution is c++, is it correct?

Yes they are open source

Re: C# vs C++

N a v a n e e t h1-Mar-10 21:44

N a v a n e e t h

1-Mar-10 21:44

jekak wrote:
my App going to be very corelated to HardWare Network so maybe better solution is c++, is it correct?

In C++ it is easy to do low level stuff. But, my point was that since you are not comfortable with that language, it is better to use the one which you are good at. C++ has got a steep learning curve and you will run into lot of problems at the beginning. If you are OK with that, C++ will be definitely a good choice.

Best wishes,
Navaneeth

Re: C# vs C++

Paulo Zemek2-Mar-10 1:57

Paulo Zemek

2-Mar-10 1:57

What, exactly, will be corelated to hardware?

Using TCP/IP (instead of implementing a network driver) doesn't requires that you use hardware directly.

to retrieve position

narchans4u1-Mar-10 19:04

narchans4u

1-Mar-10 19:04

how to get the current global position in mapWindowGis?

Re: to retrieve position

Programm3r1-Mar-10 19:36

Programm3r

1-Mar-10 19:36

Hi,

Haven't worked with MapWindow myself, but maybe the following Tutorials[^] might help you.

Kind regards,

data and picker control in winforms using c3.net

Ch.Gayatri Subudhi1-Mar-10 17:36

Ch.Gayatri Subudhi

1-Mar-10 17:36

Hi,

How to code for to get data and time picker in windows form.
Means whn a user click an image , thn a data and timer control hv to display that user can select data and time as his reqirment and that valus shold placed to the textbox. in windows ..

With regards

Ch.Gayatri

Re: data and picker control in winforms using c3.net

rah_sin1-Mar-10 19:25

rah_sin

1-Mar-10 19:25

you can do that by writing ur code on the onclick event of the image to show data and timer control

rahul

try catch in C#

jojoba20111-Mar-10 17:17

jojoba2011

1-Mar-10 17:17

How can i get :
the value or Parameter that cause error in try block?

Simple example :
try
{
int i=0;
int j=2;
int k=j/i;
}
catch(Exception e)
{
messagebox.show(e.Message);
}

now i wanna to have these :

in line 5 the exception occurred and i=0 made the exception;

Re: try catch in C#

Nematjon Rahmanov1-Mar-10 19:13

Nematjon Rahmanov

1-Mar-10 19:13

you mean ,

try
{
int i=0;
int j=2;
if(i==0)
{
throw new ArgumentNullException();// or your exception class
}
int k=j/i;
}
catch(Exception e)
{
messagebox.show(e.Message);
}

We are haven't bug,just temporarily undecided problems.

Re: try catch in C#

Dave Kreskowiak1-Mar-10 19:14

Dave Kreskowiak

1-Mar-10 19:14

jojoba2011 wrote:
the value or Parameter that cause error in try block?

If you're asking what I think you are, you can't get that detailed of a message.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

Re: try catch in C#

jojoba20111-Mar-10 19:24

jojoba2011

1-Mar-10 19:24

I exactly want this message :

line 5 exception occured 
i=0 made this error

Re: try catch in C#

N a v a n e e t h1-Mar-10 20:12

N a v a n e e t h

1-Mar-10 20:12

Stack trace will have these details. You have to parse the stack trace and extract this information.

Best wishes,
Navaneeth

Re: try catch in C#

Richard MacCutchan1-Mar-10 22:28

Richard MacCutchan

1-Mar-10 22:28

Move i outside the try/catch block so it is visible in all sections, something like:

int i;
try
{
    i=0;
    int j=2;
    int k=j/i;
}
catch(Exception e)
{
    string msg = "i = " + i + " " + e.Message;
    messagebox.show(msg);
}

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: try catch in C#

PIEBALDconsult2-Mar-10 4:08

PIEBALDconsult

2-Mar-10 4:08

i=0 didn't cause the Exception; it's j/i.

You could put the three statements each in its own try/catch.

You could keep track of where you were in the process:

int x;

try
{
x=0;
int i=0;

x=1;
int j=2;

x=2;
int k=j/i;

x=3;
}
catch(Exception e)
{
string err="";

switch(x)
{
case 0: err = " caused by i=0" ; break ;
case 1: err = " caused by j=2" ; break ;
case 2: err = " caused by k=j/i" ; break ;
}

messagebox.show(e.Message + err );
}

Re: try catch in C#

carlecomm2-Mar-10 17:36

carlecomm

2-Mar-10 17:36

"i=0 made the exception" can be thrown by
catch(DevideByZeroException)
{

}
but I don't know how to throw "in line 5 the exception occurred" until now.

modified 27-May-14 4:55am.

StreamReader

jojoba20111-Mar-10 17:01

jojoba2011

1-Mar-10 17:01

how can warp text when writing it in txt file (using StreamReader) ?

Re: StreamReader

Dr.Walt Fair, PE1-Mar-10 17:49

Dr.Walt Fair, PE

1-Mar-10 17:49

I'm not sure what you mean, unless you meant "wrap" instead of "warp"?

To wrap text saved in a text file, you just insert linefeeds and/or carriage returns. But what context are you talking about? Most text editors and controls will take care of that automatically.

CQ de W5ALT

Walt Fair, Jr., P. E.
Comport Computing
Specializing in Technical Engineering Software

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