C# Discussion Boards - CodeProject

Jonas Beckeman25-Jul-06 3:55

25-Jul-06 3:55

Still, isn't it something like USD 5.000 per seat (per year?)? That's quite a lot compared to the 700 VS Pro licenses we use now.

Implementation of a cancelable event

LongRange.Shooter24-Jul-06 6:04

LongRange.Shooter

24-Jul-06 6:04

I have a need in my framework to initiate an event in much the same way FormClosingEvent is implemented. I basically need a way for the event handler to cancel the remaining logic in my program. Example:
I display a set of records.
I raise the event that the user wants to release these records.
If the EventHandler can execute without problems I need to execute
code that will clear the records from the view and get a clean
list of record sets which is now minus the set that was released.
If the EventHandler sets my Cancel boolean to true, then I will not
do anything at all. The caller will raise the appropriate event
passing the error message for me to display.

I have searched the net until my eyes are red but I cannot find any article that discusses the steps to implement a cancelable event. I realize that implementing a callback is part of the process. But I'm not sure how I do this in such a way that when the set Cancel=true, that my code does not execute....and when they do nothing how my code ever gets executed.

assistance greatly appreciated.

Re: Implementation of a cancelable event

Ed.Poore24-Jul-06 7:08

Ed.Poore

24-Jul-06 7:08

theRealCondor wrote:
implementing a callback is part of the process

Not necessarily, if you have two events for example (or overridable functions, or both) one which is OnClosing and one that is OnClosed then if you have your method which closes the program, e.g. the method Close then something like this may work

public void Close()
{
    CancelEventArgs e = new CancelEventArgs();
    // Should check that there are no null event handlers here
    this.OnCancelling(e);
    // Check that the cancel is still false
    if (e.Cancel == false)
    {
        this.OnClosed(new EventArgs());
    }
    // Close down the program
    this.InternalShutdown();
}

So basically you fire the OnCancelling event (which should be done through an overridable method like in the framework classes). If cancel in the event args is true then you stop, if it's false then you can continue and close the program.

As of how to accomplish this I wouldn't have a clue at the moment and I'm too lazy to google it

Re: Implementation of a cancelable event

LongRange.Shooter25-Jul-06 10:29

LongRange.Shooter

25-Jul-06 10:29

Thanks. I had found some references to CancelEventArgs() and I've been just too swamped to think of the simplest approach...to inherit the CancelEventArgs. It's in place and my team is testing it this week. Thanks much for you help.

Michael

Re: Implementation of a cancelable event

Ed.Poore25-Jul-06 11:19

Ed.Poore

25-Jul-06 11:19

Glad to be of some help.

As of how to accomplish this I wouldn't have a clue at the moment and I'm too lazy to google it

How I get the name of a textBox?

Schimaera24-Jul-06 4:28

Schimaera

24-Jul-06 4:28

Hello community,

I´ve several textboxes. If I change a textbox, a method will be called by the "event-property" of the textbox. Now in the method I want the name of the textBox which was calling. I tried to get the name by the "object sender" paramter. There is the value and so on but no name. Is there any possibility to get the name of the method which was calling?

Thank you very much for your help!

Re: How I get the name of a textBox?

Stefan Troschuetz24-Jul-06 4:30

Stefan Troschuetz

24-Jul-06 4:30

((TextBox) sender).Name

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook

www.troschuetz.de

Re: How I get the name of a textBox?

Schimaera24-Jul-06 4:37

Schimaera

24-Jul-06 4:37

It works! Thank you very much! I didn´t believe that I can use "TextBox" but now I know it. Smile | :)

Re: How I get the name of a textBox?

Drew McGhie24-Jul-06 8:18

Drew McGhie

24-Jul-06 8:18

A better way might be to do this:

Textbox TempTB = sender as Textbox;<br />
if (TempTB != null)<br />
{<br />
   //do whatever<br />
}

the extra layer of protection might prevent errors

Re: How I get the name of a textBox?

Ista24-Jul-06 11:19

Ista

24-Jul-06 11:19

private void button1_Click(object sender, EventArgs e) {
if (sender as Control != null)
MessageBox.Show(((Control)sender).Name);
}

if quite compact

1 line of code equals many bugs. So don't write any!!

Re: How I get the name of a textBox? [modified]

Schimaera24-Jul-06 20:24

Schimaera

24-Jul-06 20:24

Aha, I thouhgt that less code is better. But I think you mean that you can more specify the code and so it it less vulnerable for errors. Have I understood it correctly?

-- modified at 2:28 Tuesday 25th July, 2006

Re: How I get the name of a textBox?

Ista25-Jul-06 3:02

Ista

25-Jul-06 3:02

Well my code does the exact same thing that Drews code did.

The only difference is:

I am not creating an Extra variable to store the reference.

There is less code to manage, making it easier to read for faster debugging and still remains clear for its intent.

The One line of code equals many bugs refers to a staement in to TAO of programming article easily found on google.

The basically is saying write as few lines as possible. They will always have to be maintained. And the fewer lines written, the less maintenance needed in the future.

Nick

1 line of code equals many bugs. So don't write any!!

Re: How I get the name of a textBox?

Schimaera25-Jul-06 20:50

Schimaera

25-Jul-06 20:50

Now I understand. Very funny this TAO of programming. Big Grin | :-D

Thanks!

Reading Characters At MouseLocations

AB777124-Jul-06 4:17

AB7771

24-Jul-06 4:17

Hi all,

I guess all have used the Babylon software
One of the feature of Babylon is if we click on any word in any window
it reads that word and displays the meaning of that word.
I also want to read the word when the mouse is clicked on it.
The word can be on any window, IE or desktop i.e. anywhere.

Any pointers or references to the same will be appreciated.

Thanks & Regards,
Pramod

Re: Reading Characters At MouseLocations

Gavin Roberts24-Jul-06 5:55

Gavin Roberts

24-Jul-06 5:55

the functionality is easy, just use a httpwebrequest to google and use define: {word}

but the only way I think it could be done without some magical code is to watch the clipboard and run code on it when ever it changes to get the definition.

Unless anyone else comes up with something more interesting?

Gav

webbrowser automation in .net 2.0

Green Fuze24-Jul-06 4:16

Green Fuze

24-Jul-06 4:16

Hey everybody!

I'm writing automation using the webbrowser controller. I already wrote this kind of automation in c# 2003, but this time I'm encountering a silly problem that I just can't find an answer to.

I'm getting a button as an HtmlElement from the HtmlDocument using the button's ID, and all I want is to click that button. for some reason I don't find any way to push the button!

can anyone help me with silly problem ???

THANKS!

Re: webbrowser automation in .net 2.0

LongRange.Shooter24-Jul-06 6:28

LongRange.Shooter

24-Jul-06 6:28

You might get a faster answer if you post it in the ASP.NET forum.

C# DirectX Overlay

seq-24-Jul-06 4:00

seq-

24-Jul-06 4:00

Hey all!

Id like to write a piece of code which would display some text in directx.
But Id like it to display it while playing an online game (so that why playing in a corner
there would popup a halftransparent text about some statistics, for more details:
the online game is called America's Army ;]). But Im now quite sure how to do it, so
that the game wont minimize itself, like the communicator: xfire does.

Have anyone already tried that ? I would appreciate for any help or example code
in C#.

With regards,
Pawel

Re: C# DirectX Overlay

Gavin Roberts24-Jul-06 5:52

Gavin Roberts

24-Jul-06 5:52

no real need for using directx, you can use a simple windowless form and set the transparency color the same of your background, tip: I usually use Magenta.

Now you can position your form where ever you want, and it will display the text as required.

Just make sure what ever you want to show isn't the same color as the transparency color.

Gav

Re: C# DirectX Overlay

seq-24-Jul-06 7:28

seq-

24-Jul-06 7:28

sorry Im quite new to C#.. what do you mean by windowless form ? how to achiev it ?

Date Formatting

Brendan Vogt24-Jul-06 2:50

Brendan Vogt

24-Jul-06 2:50

Hi,

If the current day is anything less than 10, I want to save it to a string variable as 01, 02, 03, 04, etc. How does one do it like this?

I tried the follwoing, but it prints out as dd:

string strYY = String.Format("{0:dd}", objDateTime.Year);

Is this correct? If so, why is it not working?

Regards,
ma se

Re: Date Formatting

stancrm24-Jul-06 2:55

stancrm

24-Jul-06 2:55

string strYY = objDateTime.Year.ToString("D2");

Re: Date Formatting

Brendan Vogt24-Jul-06 3:08

Brendan Vogt

24-Jul-06 3:08