C# Discussion Boards - CodeProject

Kant22-Apr-03 6:01

22-Apr-03 6:01

Thanks S. Rod.

Are you by any chance MCP.net?

If not, by your replies in this board you deserve to be
Code Project MVP.net... Cool | :cool:

Don't

and drive.

Re: Any converters for C++?

Alvaro Mendez22-Apr-03 6:10

Alvaro Mendez

22-Apr-03 6:10

Yep, S.Rod. is definetely the man. Smile | :)

Regards,
Alvaro

When birds fly in the right formation, they need only exert half the effort. Even in nature, teamwork results in collective laziness. -- despair.com

Re: Any converters for C++?

Stephane Rodriguez.22-Apr-03 6:41

Stephane Rodriguez.

22-Apr-03 6:41

Eh eh, the only label I would accept is Bill Sergio's son. Just kidding, bwahahahahahahaha!!!! Laugh | :laugh:

Seriously though there are so many MCPs or whatever so-called experienced guy around, that there is no point any longer in being one. Often they are experienced, but I wonder whzt it brings them in the end. It is my experience that diplomas or labels are one thing, and the ability to communicate is another. What brings value is, and this is not going to change anytime soon, is a good asset of relations and friends in other companies. Roll eyes | :rolleyes:

VS .NET Startpage only shows "My Profile"

STW22-Apr-03 0:24

STW

22-Apr-03 0:24

I've installed VS .NET on my machine. As I started up .NET, the Startpage only shows "My Profile" on the left menu. I was used that the last opened projects were listed on the right.
The settings for the startpage are correct. Setting "Reset Window Layout" does nothing change.
Does anybody know how to solve this problem or to reforce VS .NET to show the correct entry-page?

Thanks!

Stefan

Re: VS .NET Startpage only shows "My Profile"

Dire_st22-Apr-03 7:40

Dire_st

22-Apr-03 7:40

um, under tools and options, and in th Enfironment under General, there is a drop down with a heading of "At startup:" and you can specify the last loaded solution.

I hope this is what you need.

"When I was young we had a quicksand box - I was an only child, eventually" - Steven Wright

Excel 2000

Marix21-Apr-03 21:06

Marix

21-Apr-03 21:06

When I try to access Excel 2000 cell values from my applicaton I allways get the same result - "System._ComObject". What is it??? How can I get the cell value itself?
What I do is
ExcellWorkbook.Names.item(22,0,null).RefersToRange.Cells[1,1].ToString()!!!!

Re: Excel 2000

Philip Fitzsimons22-Apr-03 2:15

Philip Fitzsimons

22-Apr-03 2:15

.Value ?

"When the only tool you have is a hammer, a sore thumb you will have."

Re: Excel 2000

Eric Gunnerson (msft)22-Apr-03 11:39

Eric Gunnerson (msft)

22-Apr-03 11:39

I think it's actually .Value2...

Re: Excel 2000

Philip Fitzsimons22-Apr-03 11:42

Philip Fitzsimons

22-Apr-03 11:42

ah, silly me Poke tongue | ;-P

"When the only tool you have is a hammer, a sore thumb you will have."

Re: Excel 2000

Eric Gunnerson (msft)23-Apr-03 11:24

Eric Gunnerson (msft)

23-Apr-03 11:24

What were you thinking? Who could possibly expect that the value would be stored in "Value"?

Re: Excel 2000

Philip Fitzsimons23-Apr-03 23:35

Philip Fitzsimons

23-Apr-03 23:35

I guess thats why I'm not allowed to design frameworks...

p.s. how is this going to be handled in .net? is their an artical dealing with how the framework will handle this?

"When the only tool you have is a hammer, a sore thumb you will have."

Focusless button?

Steven Behnke21-Apr-03 14:18

Steven Behnke

21-Apr-03 14:18

Hey guys,

I'm trying to develop a C# User Control that allows me to send key events. I can use SendKeys.Send() no problem, but it focuses the button so that the button recieves the keydown/keyup/keypress events. I've tried to make my own button and override WndProc(). I'm blocking WM_FOCUS = 7, but no luck. Does anyone have an idea?

Thanks,
Steven

Re: Focusless button?

Steven Behnke22-Apr-03 7:02

Steven Behnke

22-Apr-03 7:02

For the moment I've used labels, SendKeys.Send() and onClick for the labels. Let me know if anyone finds a better solution with buttons.

Thanks,
Steven

.config

Kant21-Apr-03 11:48

Kant

21-Apr-03 11:48

I have a question reg. the .config files.

I know that by using the .config file you can redirect the application to use a different version of an assembly or look in a different location for an assembly.

Do we have to use same public key which the application expects? What happens if I don't provide it?

Don't Beer | [beer]

and drive.

Re: .config

Paresh Gheewala21-Apr-03 12:32

Paresh Gheewala

21-Apr-03 12:32

if you are loading dynamically,
use Assembley and then check version, and major, minor .
need to compair versions and based on that u load that.

check Reflection and Emit classes.

Smile | :)

What does "event" do to a delegate member?

Alvaro Mendez21-Apr-03 11:38

Alvaro Mendez

21-Apr-03 11:38

I've been reading up on delegates and events lately and I'm really confused as to what the event keyword does. Does it actually do anything?

For example, I have this piece of code inside my class:

public delegate bool Validator(char c);

Then I define two members:

protected Validator dVal;
protected event Validator eVal;

And I use them:

dVal += new Validator(Char.IsDigit);
eVal += new Validator(Char.IsDigit);

How is eVal different than dVal? They both behave identically.

I appreciate your enlightenment. Smile | :)

Regards,
Alvaro

When birds fly in the right formation, they need only exert half the effort. Even in nature, teamwork results in collective laziness. -- despair.com

Re: What does "event" do to a delegate member?

Eric Gunnerson (msft)21-Apr-03 13:18

Eric Gunnerson (msft)

21-Apr-03 13:18

Events are like delegates except for two things:
1) They're protected so that users can't overwrite them
2) They can be stored in a sparse manner.

For more information, look at these columns:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dncscol/html/csharp04192001.asp[^]

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dncscol/html/csharp05172001.asp[^]

Re: What does "event" do to a delegate member?

Alvaro Mendez22-Apr-03 5:03

Alvaro Mendez

22-Apr-03 5:03

Thanks Eric. It's nice to hear the answer from the source.

That explains why I couldn't get something like textBox.KeyDown.GetInvocationList() to compile.

Great articles, BTW. Smile | :)

Regards,
Alvaro

When birds fly in the right formation, they need only exert half the effort. Even in nature, teamwork results in collective laziness. -- despair.com

Problem with shortcuts

monrobot1321-Apr-03 10:30

monrobot13

21-Apr-03 10:30

Hi,

I have a form with a RichTextBox on it and I also have an Edit menu that has cut, copy, paste in it. In the handlers for those menu commands I have code like this:

if (rtbNotepad.SelectionLength > 0)
    rtbNotepad.Cut ();

now everything with the RichTextBox works fine. The problem occurs when I try to paste into anything else. For example I have a regular textbox on the form and I can't cut/copy/paste into it with because the shortcuts are basically hardwired to the RichTextBox. The workaround I'm thinking of is to remove the shortcuts when the RTB loses focus and add them when it gains focus. I don't really like this idea but it's the only one I have at the moment. Does anyone have any better ideas for this problem?

thanks

- monrobot13

Required designer variable "components"

Arun Bhalla21-Apr-03 10:16

Arun Bhalla

21-Apr-03 10:16

/// <summary> <br />
/// Required designer variable.<br />
/// </summary><br />
private System.ComponentModel.Container components = null;

I didn't think much of it until last night, when I was being careful to make sure that my Dispose() methods did all that they should.

VS.NET 2002 designer adds the above code to Windows forms/controls. Is this variable actually required by the designer -- it seems not -- and if not, why doesn't the designer actually make use of this elsewhere.

If Container.Dispose() disposed of its contained components, it seems like it could be smart to add controls, etc. to the components Container in the InitializeComponent() method, but I can't find any evidence of the former.

Got Focus

aoyee21-Apr-03 8:57

aoyee

21-Apr-03 8:57

hi..everyone...
i need help~~
i want to use C# to write a program like this:
when richTextBox focus
a ListBox also gotfocus....and can move up and down

just like design C# code
when user key a keyword(ex: a class's name or a object's name) and key "."
having a listbox show the class's or object's method or property
please help me..................thanks

precision problems with double type

sammyh21-Apr-03 8:19

sammyh

21-Apr-03 8:19

I'm having precision problems with the double type, the help files say I should get 15 digits of precision...

BUT...

double d1 = 12589230.0342;<br />
double d2 = -10.335927963256836;<br />
<br />
//good precision, but when added, problems occur<br />
<br />
double newd = d1+d2;<br />
<br />
// newd now equals 12589220.0

Where's all my precision????

I've tried decimal type, but is's incredibly slow.... I have to use it when multiplying, but addition of 10???

Any suggestions?

should I use my own type? Possibly a binary coded decimal

Thanks for any help.

-Sam

Re: precision problems with double type

Stephane Rodriguez.21-Apr-03 8:50

Stephane Rodriguez.

21-Apr-03 8:50

The result I see in the watch window is 12589219.698272036, not 12589220.0.
(the real result is 12589219.698272036743164).

The decimal type can be used (28 digit precision) :
decimal d1 = 12589230.0342M;
decimal d2 = -10.335927963256836M;
decimal d = d1 + d2;

and I get the real result in the watch window.

Re: precision problems with double type

sammyh21-Apr-03 9:19

sammyh

21-Apr-03 9:19

YOU'RE right!!!!!

Now that makes things even weirder....

My actual code....

public void Translate(double x, double y, double z)
{
foreach(DPoint p in points)
{
p.x += x;
p.y += y;
p.z += z;
}

}

a Dpoint is just 3 doubles x,y,z

on the first iteration of the foreach:
x=12589230.0342
y = 693719.8863
z = 0.0

p.x = -10.335927963256836
p.y = 9.6102085113525391
p.z = 5.7499995231628418

after first iteration
p.x = 12589220.0
p.y = 693729.5
p.z = 5.7499995231628418

I'm trying to replicate problem is a simple app now...

Re: precision problems with double type

sammyh21-Apr-03 9:59

sammyh

21-Apr-03 9:59

This snippet:

decimal px = -10.335927963256836M;<br />
				<br />
<br />
		decimal ix = 12589230.0342M;<br />
				<br />
<br />
		decimal nx= px + ix;<br />
				<br />
		double d = Convert.ToDouble(nx);<br />
<br />
		double c = 2;

Works as long as it happens before this line:

device = new Device(graphicsSettings.AdapterOrdinal, graphicsSettings.DevType,
windowed ? ourRenderTarget : this , createFlags, presentParams);

If it happens the line after I get my problem....

now that is messed up, how can it change the behavior of a built in type????

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