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I'll 3rd that. Coming from Java, there really wasn't much to learn. It was a really smooth transition. Of course things have changed some since then, but I think you'll have a similar experience.
I don't know much C++, but I'm sure Java is most like C#. Interfaces, single inheritance, etc...
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If you're already reasonably confident in the basics of C# I'd suggest C++.
As others have said, if you're a total novice in C#, knowing some Java really helps get you started. Personally, I'd been using Java, PHP and VB/VB.net and I found the transition fairly smooth. I'd tried C++ with very limited success and always filed it as one of those things that 'I really should learn properly one day'. Now, having used C# for a while, I'm sure I'd be much more confident with and knowlegeable about C++ if i ever find the need, as C# can do pretty much everything I want.
So (I think) it comes dowwn to how advanced you feel you are in C#. An early learner - probably do the Java. Confident/fairly experienced in C# - probably do C++.
Just my 2c. Good luck with which ever you choose (or do them both if you have the time and can handle it!?!).
Dave
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I'd take the C++ class over the Java based one. Nothing is better than learning the master of all language. If you fully understand C# syntax (then to some extent you know simple C syntax) then I'd go and learn the C++. Nothing is better than fully understanding C++. If you do then you can write C++ in any programming language, now and into the future.
The hard part of switch to C++ syntax from a C# style is the operators used. this->setColor(red,green,blue); instead of this.setColor(red,green,blue);
This is the same when switching from C# (or C++) to php or something with similar syntax.
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C# is based mostly on C++, Pascal and Java.
It's a lot of C++ syntax, but without the need to mess with pointers.
It's object oriented like Java.
It's strictly typed like Pascal (and Java).
I think that you should choose your class depending on where you feel that your weaknesses are. If you want to learn about object orientation you should choose Java, if you like to learn about what really happens with bytes and references you should choose C++.
Experience is the sum of all the mistakes you have done.
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I'm using the remove method of a generic list and then saving the class to disk by serialization.
I've noticed that sometimes the data is serialized before the remove has completed, therefore the class gets saved inlcluding the data that should have been removed.
I'm using Application.DoEvents() and it appears to be working but I wondered if this would be reliable, or if there's a better way?
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you can also use backgroundWorker for the same 
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Thanks, I don't know why I didn't think of that - do the serialize in the completed event of BackgroundWorker 
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Hello, I'm currently in the midst of taking an assessment test, and I need some help with something. essentially, what I need to do, is dynamically reverse a string as it is entered into a text box, and while it is being reversed, replace every number entered (1,2,3) with it's word equivalent (one,two,three). Now I have the string reversal part nailed with the following function:
<br />
public string Reverse(string x)<br />
{<br />
char[] charArray = new char[x.Length];<br />
int len = x.Length - 1;<br />
for (int i = 0; i <= len; i++)<br />
charArray[i] = x[len-i];<br />
return new string(charArray);<br />
}<br />
My main problem is I am not very sure how to dynamically change the numbers to words as the entered string is being reversed. I am considering using some code along the lines of this:
<br />
public string numCheck(string x)<br />
{ <br />
string[] numbers = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };<br />
string[] words = { "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine" };<br />
string strReplaced = ""; <br />
int i;<br />
for(i=0; i9) <br />
{<br />
strReplaced = x.Replace(numbers[i], words[i]);<br />
x = x.Replace(ch);<br />
}<br />
return x; <br />
}<br />
However, I do not know how to properly insert this into the rest of my program to get the desired result, or even if this is the best way to do it. Thank you in advance.
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You need to include some code in the loop of your main function that checks whether the current character is numeric. If it is, you need to do a lookup to find the word that represents this number and replace the number with its word equivalent.
Paul Marfleet
"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush
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Lookup? As in a select case statement?
so far after taking your advice I have the following:
<br />
public string Reverse(string x)<br />
{<br />
char[] charArray = new char[x.Length];<br />
int len = x.Length - 1;<br />
for (int i = 0; i <= len; i++)<br />
if(char.IsNumber())<br />
{<br />
<br />
}<br />
charArray[i] = x[len-i];<br />
return new string(charArray);<br />
}<br />
I suppose my next dilemma is trying to figure out what goes into that if statement, I believe my best bet is some sort of select case statement, though the last time I tried that resulted in error. And I'm still trying to figure out what to about the IsNumber(), or rather what I need to put between those parenthesis.
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BREdwards wrote: Lookup? As in a select case statement?
Select...Case. Array lookup. Hashtable lookup. These are all viable options.
BREdwards wrote: I suppose my next dilemma is trying to figure out what goes into that if statement, I believe my best bet is some sort of select case statement, though the last time I tried that resulted in error. And I'm still trying to figure out what to about the IsNumber(), or rather what I need to put between those parenthesis.
Keep trying and you'll get there. Good luck .
Paul Marfleet
"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush
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First off, I'd say this should be in the KeyPress event handler.
The replacements can be done with a switch or Dictionary.
I expect the quickest way to do the reversal is to set the insertion point back to the start of the text with SelectionStart=0 after each character is added, but the user could move the insertion point so handle Click as well.
No, wait, set RightToLeft=true 
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Thanks so far. The string reversal part is all taken care of, my problem is having to dynamically replace all number with their word equivalents, here's what I have so far:
<br />
public string Reverse(string x)<br />
{<br />
int i;<br />
char[] charArray = new char[x.Length];<br />
int len = x.Length - 1;<br />
for ( i = 0; i <= len; i++)<br />
if(char.IsNumber(x,i))<br />
{<br />
switch(i)<br />
{<br />
case'0':<br />
x.Replace("0","zero");<br />
break;<br />
}<br />
}<br />
charArray[i] = x[len-i];<br />
return new string(charArray);<br />
}<br />
I have something of an idea of what needs to be done, problem is, I can't seem to use that if statement without breaking the program. I keep getting an "index was outside the bounds of the array error" for both letters and numbers. I simply don't understand what I'm doing wrong, never had to do something like this before.
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Try this for the reversal (not taken care of if you have an error message  ):
public string Reverse(string x)
{
char[] charArray = x.ToCharArray();
Array.Reverse(charArray);
return new string(charArray);
}
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public string Reverse(string x)
{
char[] charArray = x.ToCharArray();
Array.Reverse(charArray);
return new string(charArray);
}
private static class NumericStringRepresentations
{
private static Hashtable _PairsTable = new Hashtable(9);
public static Hashtable PairsTable
{
get { return _PairsTable; }
}
static NumericStringRepresentations()
{
_PairsTable.Add("0", "zero");
_PairsTable.Add("1", "one");
_PairsTable.Add("2", "two");
_PairsTable.Add("3", "three");
_PairsTable.Add("4", "four");
_PairsTable.Add("5", "five");
_PairsTable.Add("6", "six");
_PairsTable.Add("7", "seven");
_PairsTable.Add("8", "eight");
_PairsTable.Add("9", "nine");
}
}
public string NumbersToStrings(string x)
{
string returnString = "";
if (!(x.Length == 0))
{
for (int i = 0; i < x.Length; i++)
{
string thisCharacter = x.Substring(i, 1);
int returnedInt;
if (int.TryParse(thisCharacter, out returnedInt))
{
returnString += NumericStringRepresentations.PairsTable[thisCharacter];
}
else
{
returnString += thisCharacter;
}
}
}
return returnString;
}
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Marvelous! I was planning to use an array, but this works as well. Thank you, I'll be sure to save this so I can study later. However, when compiled, it delivers an error saying: "The Modifier 'static' is not valid for this term."
After a bit of research, I found that my version of VS is too old to have static as a modifier for the class, as I am using 2003 still.
Anyhoo, thanks for eveything.
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I'd like to create a button that isn't the standard rectangular shape.
Haven't found anything in the articles, the forums or on the net on how to do it.
So far the only solution I can come up with is to use a PictureBox, handle the mouse events, etc...
Any suggestions or code snippets would be great.
thanks,
Mike
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This code came from here[^]. It needs a little work in the OnPaint as it doesn't display the text but it might help get you started...?
using System;
using System.Drawing;
using System.Windows.Forms;
namespace CustomButtons
{
public class MyButton : Button
{
protected override void OnPaint(PaintEventArgs e)
{
Rectangle rect = new Rectangle(new Point(0, 0),
new Size(this.Width, this.Height));
System.Drawing.Drawing2D.GraphicsPath myPath = new
System.Drawing.Drawing2D.GraphicsPath(System.Drawing.Drawing2D.FillMode.Winding);
myPath.AddEllipse(rect);
Region myRegion = new Region(myPath);
this.Region = myRegion;
using (System.Drawing.Drawing2D.LinearGradientBrush brush =
new System.Drawing.Drawing2D.LinearGradientBrush(rect, Color.CornflowerBlue, Color.White, 45))
{
e.Graphics.FillEllipse(brush, 0, 0, this.Width, this.Height);
}
}
}
}
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One little additional hint: I don't think that creating a new Region every time the button is repainted without disposing of the previous one is a good idea...
Regards,
mav
--
Black holes are the places where God divided by 0...
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I have object A, operating in the program's main thread, which creates several copies of object B (B1, B2, etc) and executes them in several threads.
I have figured out how to get A to raise a custom event that B2 should deal with. Since A knows all about the objects it created, it simply calls B2.OnBEvent().
However, I now want a B object (say B3) to raise an event for A to deal with. B3 does not know about the object A (no reference to A has been passed to B3), so it can't call A.OnAEvent().
My question is, can I declare an OnAEvent() method to be static, so that B3 does not have to know about object A? Can I call ClassA.OnAEvent() and have that event handled by object A?
BTW: in the on-going conflict between how threading is done and how Clive Pottinger thinks threading is done, the score now stands at 43 - 0.
Clive Pottinger
Victoria, BC
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Perhaps make it a static event and make the "child" classes register for the event when they're created?
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That is what I was asking - is setting up a static event possible.
I know I could simply pass a reference to A to B1, B2, B3, etc. Then the B's would have no problem raising an event for A to deal with. I was just wondering if there is a way to do this without having to pass that reference to A.
I'll see if I can find out how to create a static event. I haven't yet run across examples or documentation showing that being done.
Clive Pottinger
Victoria, BC
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public class A
{
public static event EventHandler<YourEventArgs> GlobalEvent;
public A()
{
A.GlobalEvent += new EventHandler<YourEventArgs>(delegate void (YourEventArgs e)
{
});
}
}
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What you are describing are not really events, but method calls. Take a look at C# events and delegates, any documentation you find on them will show you how to use them. When A creates instances of Bs, it can register itself with B events and visa versa.
Only set up static events on A if it makes sense to do so. Most often it will make more sense for the instance to process events. Just google "C# event", I'm sure that will get you plenty of starting points.
Hope that helps.
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Actually, I was talking about the events. In my examples I was just showing the calls to the methods that raise the events for simplicity.
It would seem, from your reply, that it is possible to set up a static event the class A. Whether or not that is better is better than passing A to the B's so they can register the event...? I'll try and see.
Clive Pottinger
Victoria, BC
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