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Labels are reference types, putting an existing label in an array (or some other collection)
is just an administrative operation, it does not change your label, nor does it create
a new one. It does provide a structured way to access one or more labels afterwards, as in:
Label[] myLabels=new Label[37];
for (int i=0; i<=36; i++) {
Label label=new Label();
label.Text="number "+i;
myForm.Controls.Add(label);
myLabels[i]=label;
}
myLabels[7].Text="I was here";
This snippet shows run-time actions to create labels and to add them to the form.
It does not include the code to take care of size, font, and location !
You could add these at will.
-- modified at 9:02 Tuesday 30th January, 2007
Luc Pattyn
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The way this is usually done is to create an array of 37 ints... one for each number 0 to 36. Then in each cell of the array, you store the number of times that spot has been hit.
There are many ways to display the reports after each spin. I would say, just keep your 37 controls in an array, and match up the values. So, after a roll, you would have something like this:
<br />
hits[spot]++;
labels[spot].Text = rolls[spot].ToString();
There's some much more elegant solutions to this, but this is pretty straightforward.
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I've eventually worked out how to hold the values in an array for any given amount of spins. The next part would be to get these values onto the page.
Do I need to have the labels in a Array as you suggest? Can't I now match the existing lables lb0,lb1,lb2lb3 etc on the screen to my new 0-36 array (arHitArray) with the 'hits' as values in?
sort of .....
for (int a=0; a < 37; a++)
{
lb(n).text = arHitArrary(n).value
}
otherwise it's just ........
lb0.Text = arNumArray[0].ToString();
lb1.Text = arNumArray[1].ToString();
lb2.Text = arNumArray[2].ToString();
lb3.Text = arNumArray[3].ToString();
which is ok but not very cool.
Thanks for so far though
-- modified at 12:28 Tuesday 30th January, 2007
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You can do the former using reflection, but it makes the code significantly more complex and error prone since a typo won't be found at compile time. An array of labels is by far the easier solution.
--
Rules of thumb should not be taken for the whole hand.
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Is this for a web application or what?
There's a lot of questions here, but the overall application should be extremely simple. No reflection or any of that junk needs to be done here, it's a simple roulette application. Using a bunch of Label controls for the UI isn't the best option, but it's viable.
Anyway, at the beginning of the program, you put all the Labels into one array and you create an array of integers to match. Probably just do this with 37 lines of code, that way, you can rename things later if you want, and you aren't depending on some majick naming scheme to make your app work.
Now, ideally, you are only going to represent one roulette spin each time... so you only have to update one Label and one integer each time... the one you hit. Follow me now? No loops or anything, just a simple event handler that generates your random number and updates a single element of the interface, and a single element of the integer array. C# is strongly typed, so you'll have to convert your int to string...
<br />
int num = (some random number);<br />
spots[num]++;<br />
(labels[num]).Text = spots[num].ToString();<br />
So your initialization is tricky, but then your operational phase is elegant and simple. This is ok as long as it enables a straightforward approach. Think about this in terms of M-V-C...
http://en.wikipedia.org/wiki/Model-view-controller[^]
M = array of integers representing the history of spins (you could also add other simple elements, like maybe a single integer representing the most recent roll)
V = array of Labels (and all the built-in crap that makes them work)
C = Buttons and such on the interface, and your event-handler function
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I'm surprised people actually suggested a hash table for this... wtf??? 
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Yeah, the hash table threw me a bit, I've got this simple little App working thanks to all the advice given. The bit stumping me was transfering the 'results' onto the corresponding lables on the page.
Thanks though, this forum really works !
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the c# code:
public delegate void SchedulerEventDelegate(SchedulerEventType type, string scheduleName);
static public event SchedulerEventDelegate OnSchedulerEvent;
if (OnSchedulerEvent != null)
how can I convert this to VB?
more detail:
I have a code in c# from http://www.codeproject.com/csharp/eventscheduler.asp
My boss ask me to convert it to vb.net
currently I have a problem with this line:
Code:
if (OnSchedulerEvent != null) (in c#)
when i convert it to
visual basic code:--------------------------------------------------------------------------------If Not OnSchedulerEvent Is Nothing Then--------------------------------------------------------------------------------
the error I'll get:
Public Shared Event OnSchedulerEvent(type As SchedulerEventType, StrScheduleName As String)' is an event, and cannot be called directly. Use a 'RaiseEvent' statement to raise an event.
what can I'll do????
C# code
Code:
public delegate void SchedulerEventDelegate(SchedulerEventType type, string scheduleName);
static public event SchedulerEventDelegate OnSchedulerEvent;
if (OnSchedulerEvent != null)
Vb.net code
visual basic code:--------------------------------------------------------------------------------Public Delegate Sub SchedulerEventDelegate(ByVal type As SchedulerEventType, ByVal StrScheduleName As String)
Public Shared Event OnSchedulerEvent As SchedulerEventDelegate--------------------------------------------------------------------------------
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I dont think you need to do the check in VB. The VB RaiseEvent Should take care of this for you.
All you need should be:
RaiseEvent OnSchedulerEvent(...)
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thank but i'll did the convert and someting go worng at the vb.net
and i think the prublem is there
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Here's a quick hint that will make your boss think you are a coding god.
First of all, download Lutz Roeder's excellent Reflector[^].
Then, open up the original DLL file that you want to redo.
Change the combo box from C# to Visual Basic and then select the methods you are interested in.
Select Disassembler and, hey presto, you have a VB.NET version of the C# code.
the last thing I want to see is some pasty-faced geek with skin so pale that it's almost translucent trying to bump parts with a partner - John Simmons / outlaw programmer
Deja View - the feeling that you've seen this post before.
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Yes, Yes!
There should be a "Lutz Roeder monument"!
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(via Instant VB):
If Not OnSchedulerEventEvent Is Nothing Then
note the 'Event' tagged onto the end. This accesses the hidden <event>Event variable in VB. But as an earlier poster mentioned, you rarely should need to do this check in VB since "RaiseEvent" does it for you.
David Anton
www.tangiblesoftwaresolutions.com
Instant C#: VB to C# converter
Instant VB: C# to VB converter
Instant C++: C# to C++ converter, VB to C++ converter
Instant Python: C# to Python converter, VB to Python converter
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Hello
I want to send a crypted email with a certificate and a word attachment file.
So I have created a MailMessage and I have crypted my Word Document with my Certificate.
Then I have created and alternate View with the crypted attachment.
When I receive the mail, my mail is well cryped and the attachment is in the mail (icons are displayed in outlook)
The problem is that the attachment is opened in the body of the mail just like Text (So i can see all the word specific data).
I cannot see the word as an attachment and to save it.
Any Help is welcomed
<br />
MailMessage eMail = new MailMessage();<br />
eMail.From = new MailAddress("MyMail@MyCompany.com");<br />
eMail.To.Add(new MailAddress("MyMail@MyCompany.com"));<br />
eMail.Subject = "Test";<br />
SmtpClient Smtp = new SmtpClient("MyCompany.com")<br />
<br />
#region crypt<br />
<br />
X509Certificate2 myCertificat = new X509Certificate2(@".\MyCert.cer", "xxxx");<br />
System.IO.Stream myFile = null;<br />
myFile = new System.IO.FileStream(@".\Test.doc", System.IO.FileMode.Open,System.IO.FileAccess.Read);<br />
byte[] data = new byte[myFile.Length];<br />
myFile.Read(data, 0, (int)myFile.Length);<br />
<br />
ContentInfo contentInfoCrypt = new ContentInfo(data);<br />
EnvelopedCms envelopedCms = new EnvelopedCms(contentInfoCrypt);<br />
CmsRecipient recip1 = new CmsRecipient(myCertificat);<br />
envelopedCms.Encrypt(recip1);<br />
envelopedCms.Certificates.Add(myCertificat);<br />
byte[] encryptbytes = envelopedCms.Encode();<br />
#endregion<br />
<br />
MemoryStream mss = new MemoryStream(encryptbytes);<br />
<br />
AlternateView av = new AlternateView(mss, "application/x-pkcs7-mime; smime-type=enveloped-data; name=smime.p7m;");<br />
eMail.AlternateViews.Add(av);<br />
Smtp.Send(eMail);<br />
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Hi All,
Is there any possiblity of getting the file name that is being closed currently.
For example, if a text file is opened by name "abc.txt". When I'm closing this file, a message must be prompted that "File abc.txt is closed". I need to do this in C#.
Any code sample will do..
Thanks in advance
Parimala
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Well, the normal way to do this is to store the filename in a member variable and then refer to this.
the last thing I want to see is some pasty-faced geek with skin so pale that it's almost translucent trying to bump parts with a partner - John Simmons / outlaw programmer
Deja View - the feeling that you've seen this post before.
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I'm not able to follow what the member variable means?
Could you be more specific?
Parimala
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string memberVariable = filename;
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Even if i get the filename, what event or action will indicate that the opened file is closed?
Parimala
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You could create your own class which handles all the file access, give it the member variable as suggested and create an event/delegate which you can fire when you close any FileStream. Then you can create an event handler in the main app to show your message.
Here's an article to help you create your own events if you've not done it before: http://www.codeproject.com/csharp/eventdelegates.asp[^]
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How the text file is opened.. whether r u open it programmatically or juz like that u opened.
if you opend the file programmatically.. it is easy to notify that file is opened/closed otherwise c for any other possibility like FileWatcher class..
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The file is opened programmatically. Another application has to monitor whether the file is closed or not.
Parimala
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<blockquote class="FQ"><div class="FQA">ParimalaRadjaram wrote:</div>For example, if a text file is opened by name "abc.txt". When I'm closing this file, a message must be prompted that "File abc.txt is closed". I need to do this in C#.</blockquote>
I have written a console application for you:
<code>
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace OnCloseEventExample
{
class SpecFileStream : System.IO.FileStream
{
private string _fileName;
public string FileName
{
get { return _fileName; }
set { _fileName = value; }
}
//lazy to create a new delegate. We are using System.EventHandler
public event EventHandler FileClose;
public SpecFileStream(string filePath, FileMode mode)
: base(filePath, mode)
{
_fileName = Path.GetFileName(filePath);
}
public override void Close()
{
FileClose(this, new EventArgs());
base.Close();
}
}
class Program
{
static void Main(string[] args)
{
string filePath = "";
if(args.Length < 1)
{
filePath = @"C:\test.txt";
}
else
{
filePath = args[0];
}
SpecFileStream sfs = new SpecFileStream(
filePath,
System.IO.FileMode.Create
);
sfs.FileClose += new EventHandler(sfs_FileClose);
byte[] data = Encoding.ASCII.GetBytes("writes to file this");
sfs.Write(data, 0, data.Length);
sfs.Close();
}
static void sfs_FileClose(object sender, EventArgs e)
{
SpecFileStream sfs = sender as SpecFileStream;
if (sfs != null)
{
Console.WriteLine("File " + sfs.FileName + " is being closed!");
}
else
{
throw new Exception("Invalid sender object class!");
}
}
}
}
</code>
If any comments are needed, feel free to ask.
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I'll try this and let u know. Thanks a lot.
Parimala
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When i'm compiling the code, i'm getting the following error. Could just tell me why this happens?
'System.IO.FileStream.FileStream()' is inaccessible due to its protection level
Parimala
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