Properties & and | - C# Discussion Boards

Re: How do you set a ComboBox to upper case selections?

26-Aug-02 12:13

maybe you could capture on TextChanged event and then do

myCombo.Text = myCombo.Text.Toupper();

or something like that.

Suspicious | :suss: Email: theeclypse@hotmail.com URL: http://www.onyeyiri.co.uk
"All programmers are playwrights and all computers are lousy actors."

James T. Johnson26-Aug-02 12:16

Re: How do you set a ComboBox to upper case selections?

26-Aug-02 12:16

Make sure you do something like this though:

if( myCombo.Text.ToUpper() != myCombo.Text )<br />
{<br />
  myCombo.Text = myCombo.Text.ToUpper();<br />
}

otherwise you will be setting the text over and over and over and over and over and over again. Eek! | :eek:

James
"And we are all men; apart from the females." - Colin Davies

Zombies with Coffee, LLC26-Aug-02 13:44

Zombies with Coffee, LLC

26-Aug-02 13:44

Thanks guys for your input!

I am still curious though if there was a way to get access to the TextBox directly. Any thoughts there?

Properties & and |

Christian Graus26-Aug-02 11:48

26-Aug-02 11:48

I am working on a wrapper for the XML stuff in C#, and I want to add the ability to easily declare common namespaces. What I'd like to be able to do is have an enum called Namespaces, and do this

MyDoc.Namespace |= Namespaces.XSL & Namespaces.dt;

The question is, if I define a property and make it an int, will my set method get called, will this expand to

MyDoc.Namespace = MyDoc.Namespace |( Namespaces.XSL & Namespaces.dt);

or would I be better to define operator | and operator & for my enum ?

Christian

We're just observing the seasonal migration from VB to VC. Most of these birds will be killed by predators or will die of hunger. Only the best will survive - Tomasz Sowinski 29-07-2002 ( on the number of newbie posters in the VC forum )

Cats, and most other animals apart from mad cows can write fully functional vb code. - Simon Walton - 6-Aug-2002

James T. Johnson26-Aug-02 12:15

26-Aug-02 12:15

Christian Graus wrote:
The question is, if I define a property and make it an int, will my set method get called, will this expand to

MyDoc.Namespace = MyDoc.Namespace |( Namespaces.XSL & Namespaces.dt);

To quote my favorite professor. *clears throat* "Try it and find out" Poke tongue | ;-P

I would bet that it would work as you expect, but you should put the FlagsAttribute on your enum and then use an enum of the same type for the property. Wink | ;)

James
"And we are all men; apart from the females." - Colin Davies

Christian Graus26-Aug-02 16:35

26-Aug-02 16:35

James T. Johnson wrote:
Try it and find out

Yes, you're right. The reason I often ask such dumb questions is I think about stuff on the bus and don't have .NET at work....

James T. Johnson wrote:
I would bet that it would work as you expect, but you should put the FlagsAttribute on your enum and then use an enum of the same type for the property.

Flags allows the enum to be a combination of the values ? Does it also automatically set the values to 1, 2, 4, 8, 16... ?

Thanks

Christian

We're just observing the seasonal migration from VB to VC. Most of these birds will be killed by predators or will die of hunger. Only the best will survive - Tomasz Sowinski 29-07-2002 ( on the number of newbie posters in the VC forum )

Cats, and most other animals apart from mad cows can write fully functional vb code. - Simon Walton - 6-Aug-2002

James T. Johnson26-Aug-02 17:36

26-Aug-02 17:36

Christian Graus wrote:
The reason I often ask such dumb questions is I think about stuff on the bus and don't have .NET at work....

I'm not faulting you for it; it was just my way of saying I don't know without actually saying it Big Grin | :-D

Christian Graus wrote:
Does it also automatically set the values to 1, 2, 4, 8, 16... ?

I don't think so, and a quick test confirms that it doesn't. It would have been a nice feature; but I think in the face of consistancy it is a good thing that it doesn't.

James
"And we are all men; apart from the females." - Colin Davies

Christian Graus26-Aug-02 18:12

26-Aug-02 18:12

James T. Johnson wrote:
I don't think so, and a quick test confirms that it doesn't.

Oh. So I need to do that manually ? Does the flag just allow an instance of the enum to be any value then, not just the ones defined ?

Christian

We're just observing the seasonal migration from VB to VC. Most of these birds will be killed by predators or will die of hunger. Only the best will survive - Tomasz Sowinski 29-07-2002 ( on the number of newbie posters in the VC forum )

Cats, and most other animals apart from mad cows can write fully functional vb code. - Simon Walton - 6-Aug-2002

James T. Johnson26-Aug-02 18:40

26-Aug-02 18:40

Christian Graus wrote:
Oh. So I need to do that manually ?

Yep

Christian Graus wrote:
Does the flag just allow an instance of the enum to be any value then, not just the ones defined ?

It allows any value, just like any other enum.

If you look at the IL for an enum, it is essentially a special type of class. Here is some code that is somewhat equivalent.

[Flags]
public enum TestE
{
    ItemA = 1,
    ItemB = 2,
    ItemC = 4
}

public sealed class TestE : System.Enum
{
  public const int ItemA = 1;
  public const int ItemB = 2;
  public const int ItemC = 4;
 
  public int value__;
}

A little bit of 'magic' is employed when assigning and retreiving the values in that referring to the value__ field isn't necessary. Essentially an enum is a strongly named collection of (compile-time) constant values.

Obviously a bit more magic is employed so that values can be cast willy-nilly to an enum type and add support for the Enum.Parse method.

James
"And we are all men; apart from the females." - Colin Davies

Christian Graus26-Aug-02 18:59

26-Aug-02 18:59

James T. Johnson wrote:
It allows any value, just like any other enum.

So as far as values are concerned, an enum is still essentially an int ?

Christian

We're just observing the seasonal migration from VB to VC. Most of these birds will be killed by predators or will die of hunger. Only the best will survive - Tomasz Sowinski 29-07-2002 ( on the number of newbie posters in the VC forum )

Cats, and most other animals apart from mad cows can write fully functional vb code. - Simon Walton - 6-Aug-2002

James T. Johnson26-Aug-02 19:06

26-Aug-02 19:06

an int, byte, short, long, ... whatever you declare it to be; by default it is an int.

public enum FooBarBaz : <datatype>

James
"And we are all men; apart from the females." - Colin Davies

Regular Expression Escape Sequence Nightmare!

Andy Smith26-Aug-02 12:23

Andy Smith

26-Aug-02 12:23

add the Flags attribute to your enum, and your property can be the enum type.

MStanbrook26-Aug-02 10:04

MStanbrook

26-Aug-02 10:04

I've recently been pointed in the direction of RegExps for string replacement.

However, being new to both C# and RegExps, and Escape characters are giving me fits!

I've got got to remove the following characters from a string (not including the double quotes)
"`!@$%^*()+=\|[]{};:<>/?,~"

I'm having an awful time trying to evaluate what needs to be "escaped", and how many times! Confused | :confused:

ugh.

Mike Stanbrook
mstanbrook@yahoo.com

Nnamdi Onyeyiri26-Aug-02 11:07

26-Aug-02 11:07

"^[a-z0-9_]"

the above expression should [i think] remove all characters that are not letters, numbers or the underscore, to not remove any other chars, just add them in next to the underscore.

p.s. if you dont want to keep underscores, then remove it.

Suspicious | :suss: Email: theeclypse@hotmail.com URL: http://www.onyeyiri.co.uk
"All programmers are playwrights and all computers are lousy actors."

Nnamdi Onyeyiri26-Aug-02 11:09

26-Aug-02 11:09

MStanbrook wrote:
I'm having an awful time trying to evaluate what needs to be "escaped", and how many times!

if you mean putting the slash next to them, you can just put the at sign @, before the string, and any special characters will be ignored. Smile | :)

Suspicious | :suss: Email: theeclypse@hotmail.com URL: http://www.onyeyiri.co.uk
"All programmers are playwrights and all computers are lousy actors."

Christopher Lord26-Aug-02 18:04

Christopher Lord

26-Aug-02 18:04

except the " char, which needs to be escaped with a double quote ala vb

MStanbrook27-Aug-02 5:37

MStanbrook

27-Aug-02 5:37

Here's what I've tried:

sourceString = "123 ABC X!Y%Z}"

System.Text.RegularExpressions.Regex.Match(sourceString,"^[a-z0-9_]").ToString()

which results in: "1" (why only one character?)

I've also tried the suggestion:

System.Text.RegularExpressions.Regex.Match(sourceString,@"`!@$%^*()+=\\|[]{};:<>/?,~").ToString()

Which results in:
error: managed EE does not understand expression's syntax

Removing the @ gives a result of "" (Empty string).

Mike Stanbrook
mstanbrook@yahoo.com

Nnamdi Onyeyiri27-Aug-02 6:23

27-Aug-02 6:23

im sorry, the ^ was meant to be inside the brackets, do this

string sourceString = "123 ABC X!Y%Z}";
Regex r = new Regex(@"[^a-z0-9]", RegexOptions.IgnoreCase);
MessageBox.Show(r.Replace(sourceString, ""));

Suspicious | :suss: Email: theeclypse@hotmail.com URL: http://www.onyeyiri.co.uk
"All programmers are playwrights and all computers are lousy actors."

leppie27-Aug-02 6:29

leppie

27-Aug-02 6:29

Thanx, I like to see snippets Smile | :)

MYrc : A .NET IRC client with C# Plugin Capabilities. See
http://sourceforge.net/projects/myrc for more info. Big Grin | :-D

Nnamdi Onyeyiri27-Aug-02 6:31

27-Aug-02 6:31

Dont we all Big Grin | :-D

Suspicious | :suss: Email: theeclypse@hotmail.com URL: http://www.onyeyiri.co.uk
"All programmers are playwrights and all computers are lousy actors."