Re: Getting Enum Type from Value - C# Discussion Boards

budidharma2-Nov-05 2:00

2-Nov-05 2:00

God, I must be really annoying by now ... but I'm having some problem i can't seem to find. I'm sure I'm overlooking something stupid.

... relevant methods from the card class ...

<br />
        public Card(Card c)<br />
        {<br />
            m_Rank = c.GetRank();<br />
            m_Suit = c.GetSuit();<br />
        }<br />
<br />
        public object Clone()<br />
        {<br />
            return new Card(this);<br />
        }<br />

... relevant methods from the deck class ...

<br />
        public void Shuffle()<br />
        {<br />
            Random rand = new Random();<br />
<br />
            for (int i = 0; i < 52; i++)<br />
            {<br />
                int first = rand.Next(52);<br />
                int second = rand.Next(52);<br />
<br />
                // Copy data from random card 1 to tempcard<br />
                // Copy data from random card 2 to card 1<br />
                // Copy data from tempcard to card 2<br />
                Card tempCard = m_Deck[first].Clone();<br />
                m_Deck[first] = m_Deck[second].Clone();<br />
                m_Deck[second] = tempCard.Clone();<br />
            }<br />
<br />
        }<br />

... Throws the error:
Error 4 Cannot implicitly convert type 'object' to 'Poker.Card'. An explicit conversion exists (are you missing a cast?) C:\...\Cards.cs 246 33 Poker

I tried to fix it myself, can't seem to figure out where the problem is.
When I call clone, it creates a new object from this and returns it cast as a card. I thought I'd be able to simply set an object equal to that new object ... apparently not though.

I also tried:
Card c = new mycard.Clone(); ... that throws an error as well.

Sorry for so many questions. Thank you for all the help.

budidharma2-Nov-05 2:04

2-Nov-05 2:04

God, I just figured out what you meant. You said with this method, I need to manually cast each return value, for example:
Card tempCard = (Card)m_Deck[first].Clone();

Apparently it's because Clone returns an object. Screw that! I'm going to use the latter static method that returns a Card!

Thanks again for all the help.

[Marc]3-Nov-05 0:56

[Marc]

3-Nov-05 0:56

You're not annoying at all, i'm happy to help!
I'm glad you figured it out yourself. Of course, i can explain (almost) everything for you, but a real programmer can solve problems, i think. Cool | :cool:

But that doesn't mean you should stop asking questions though!

Pompiedompiedom... Wink | ;)

"..Commit yourself to quality from day one..it's better to do nothing at all than to do something badly.."
-- Mark McCormick

Febret1-Nov-05 6:39

Febret

1-Nov-05 6:39

As Marc said, you should implement the ICloneable interface.

Notice that if you have to do a simple shallow copy as in the case you exposed, you don't have to write your own copy code, but you can use the Object.MemberwiseClone method instead. (You'll have to implement ICloneable anyway though, because MemberwiseClone is protected)

Cheers

S. Senthil Kumar1-Nov-05 19:15

1-Nov-05 19:15

Or you can use a nifty little
serialization[^] to do the copying for you.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Getting Enum Type from Value

[Marc]3-Nov-05 1:24

[Marc]

3-Nov-05 1:24

That's true (and very cool Cool | :cool:

), but:
1) The object you want to copy must be Serializable
2) I think (not tested) that it's slower than the usual way of Clone

Pompiedompiedom... Wink | ;)

"..Commit yourself to quality from day one..it's better to do nothing at all than to do something badly.."
-- Mark McCormick

budidharma1-Nov-05 3:10

Re: Getting Enum Type from Value

1-Nov-05 3:10

Alright, I have an enum called Suit ...

<br />
    public enum Suit<br />
    {<br />
        Hearts = 0,<br />
        Diamonds = 1,<br />
        Spades = 2,<br />
        Clubs = 3,<br />
        Null = -1,<br />
    }<br />

And I have a function I need to create that will return the correct rank type given an integer.
I have written this function to work with a switch statement:

switch(i)
{
case 0:
return hearts;
...
}

BUT, there must be a much cleaner way to do this, by parsing the enum type from the value - I just don't know the syntax and can't seem to find it.

It must be something like:
Rank r = Enum.Parse(Rank, i);
... of course that doens't work. But it must be something similar.

Any suggestions?

Libor Tinka1-Nov-05 3:20

Libor Tinka

1-Nov-05 3:20

Its easier than you would expect. Just convert the type:

int i = 0;

Suit suit = (Suit)i; // suit == Suit.Hearts

int index = (int)suit; // index == 0;

Re: Getting Enum Type from Value

S. Senthil Kumar1-Nov-05 3:22

Re: Getting Enum Type from Value

1-Nov-05 3:22

Simply casting to the enum type should work.

Rank r = (Rank)i;

Need to be careful though, this will compile and run even if the value of i is outside the range of Rank.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

budidharma1-Nov-05 4:30

how to display brokenrule in a messagebox with yes no button. Yes means continue with brokenRule

1-Nov-05 4:30

Thanks! Works perfect! I followed your advice and added error checking to make sure the value is between 0 and NUMRANKS (and 0 AND NUMSUITS for suits).

Thanks again!

lokeshkumble1-Nov-05 2:52

lokeshkumble

1-Nov-05 2:52

presentation layer passes .data. to business layer.
Business layer validate the .data. if any error exist Alert message should be displayed on screen with option to continue with invalid data. And post the invalid data into a Database table with flag errorfound= .true.

fdfff ff

Re: how to display brokenrule in a messagebox with yes no button. Yes means continue with brokenRule

J4amieC1-Nov-05 4:11

J4amieC

1-Nov-05 4:11

DialogResult dr = MessageBox.Show("Your data has errors, Continue?","Error!",MessageBoxButtons.YesNo);
if(dr == DialogResult.Yes)
{
   // set errorFound property = true
   // save data
}

HTH

Re: how to display brokenrule in a messagebox with yes no button. Yes means continue with brokenRule

lokeshkumble1-Nov-05 21:14

lokeshkumble

1-Nov-05 21:14

your code accessing presentation layer code
as long as architecture is concerned business layer should not call any presentation layer code.
do you have any other method

fdfff ff

-- modified at 3:15 Wednesday 2nd November, 2005

System.Data.Odbc

zaboboa1-Nov-05 2:41

zaboboa

1-Nov-05 2:41

Hello,

I am trying to set up the ODBC Connection. I have the System.Data reference, and I am trying to use System.Data.Odbc directive, but there is no such option as Odbc. Any ideas why?

Thank you.

Re: System.Data.Odbc

S. Senthil Kumar1-Nov-05 3:28

display program file in window form

1-Nov-05 3:28

Did you add a reference to System.Data.dll?

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: System.Data.Odbc

zaboboa1-Nov-05 3:40

zaboboa

1-Nov-05 3:40

Yes

hongweng1-Nov-05 2:16

hongweng

1-Nov-05 2:16

hai, does anyone know how to display a program file eg microsoft document in my window form? thank you

Re: display program file in window form

Judah Gabriel Himango1-Nov-05 4:58

Judah Gabriel Himango

1-Nov-05 4:58

You could use the Microsoft Word ActiveX object to do this. However, all that's doing is embedding an instance of MS Word into your application. The end user would need MS Word installed before he can run your app. Is this acceptable?

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Morality Apart from God
Judah Himango

Re: display program file in window form

hongweng1-Nov-05 17:57

hongweng

1-Nov-05 17:57

Thank you Judah! Actually, I'm new to this. I've imported the microsoft word activeX object but i dont know how to use it. Is there any basic step to build this in C#? Your help is much appreaciated!!

display program file in window form

hongweng1-Nov-05 2:16

hongweng

1-Nov-05 2:16

hai, does anyone how to display a program file eg microsoft document in my window form? thank you

Could the asp.net run a thread loop on the server?

rushing1-Nov-05 1:01

rushing

1-Nov-05 1:01

I want to create a while loop to recieve data.
Here is a button on the webform.
After push the button , the thread start and recieve loop begin.
However, I found it doesn't work.
Why?

Re: Could the asp.net run a thread loop on the server?

S. Senthil Kumar1-Nov-05 3:40