Edit string problem

Livijn · 02-02-2008, 05:12 AM

Hey!

Im trying to replace one char in my string with another one. Obviously i don't know what's wrong because then i would fix it. :P W/e, here's my code:

Code:

textBox4.Text[Convert.ToInt32(var)] = Convert.ToChar(var);

The compiler sais:

Code:

Error	1	Property or indexer 'string.this[int]' cannot be assigned to -- it is read only	C:\Users\HP-användare\Documents\Visual Studio 2008\Projects\Hangman\Hangman\Form1.cs	132	17	Hangman

Thank you!

Livijn · 02-03-2008, 03:07 PM

I've googled it many times, but i can't find the answer. I can give you all the information about the code, just tell me.

Magos · 02-03-2008, 03:22 PM

Strings are immutable so you can't manually assign individual characters as you can in say C++. Look up the string methods Replace/Remove/Insert as they may be what you seek.

Livijn · 02-04-2008, 01:26 AM

Thanks for your help!

AloneInTheDark · 02-09-2008, 03:23 PM

Code:

        /*########################################*/
        /*########################################*/
        /*########################################*/
        private String String_Replace(String strText, String strFind, String strReplace)
        {
            try
            {
                int iPos = strText.IndexOf(strFind, System.StringComparison.CurrentCultureIgnoreCase);
                String strReturn = "";
                while (iPos != -1)
                {
                    strReturn += strText.Substring(0, iPos) + strReplace;
                    strText = strText.Substring(iPos + strFind.Length);
                    iPos = strText.IndexOf(strFind);
                }
                if (strText.Length > 0) strReturn += strText;
                return strReturn;
            }
            catch
            {
                return strText;
            }
        }
        /*########################################*/
        /*########################################*/
        /*########################################*/

Is that what you need?

hm, You could I guess split your string into an array of bytes, replace your char there and then put it back together building a string.

Livijn · 02-16-2008, 06:25 AM

Got a question...
How can i store a word so i can get it from all classes? This doesn't work, but you might understand what i want.

Code:

public struct holder
{
       int io;
}
public class save()
{
      holder save = new holder;
      save.io = 1;
}
public class print()
{
      holder print = new holder;
      if (print.io != 1)
      {
            //true
       }
}

Well, the int io should stay at 1 not change. How do i do that?

AloneInTheDark · 02-16-2008, 09:40 PM

If you need to reach a variable from outside a class, you do it as "public ..." , if not "private ..."

Code:

public class MyClass(){
public string ThisVariableCanBeReached;
private string ThisVariableCanNOTbeReached;
}

So you'll be able to use
MyClass TEST = new MyClass();
TEST.ThisVariableCanBeReached = "bla bla";

If you need something which "doesn't change", try "public const"
public const string ThisCanNotBeChanged = "Can't touch this!";

Livijn · 02-17-2008, 05:53 AM

When i try public const string... i get an error:

Code:

Error	1	Member 'Hangman.Form1.holder.word' cannot be accessed with an instance reference; qualify it with a type name instead	C:\Users\HP-användare\Documents\Visual Studio 2008\Projects\Hangman\Hangman\Form1.cs	71	37	Hangman

Why?

AloneInTheDark · 02-17-2008, 03:25 PM

Show me the code, not that weird long error without a line break in it!

Livijn · 02-18-2008, 01:10 PM

Well since my computer crashed, it will take a while before... I must recode all!

AloneInTheDark · 02-21-2008, 02:54 AM

Quote:

Originally Posted by Livijn

Well since my computer crashed, it will take a while before... I must recode all!

huh? computer crashed? What does that have to do with your code? Did the drive die?

Dude, ever heard of BACKUPS ? DVDs? External Drives? Don't tell me you formatted your drive and "lost" everything! hahahha... god damn it, my stomac hurts from the laugh.

02-02-2008, 05:12 AM	#1
Livijn Registered User Join Date: Jan 2007 Posts: 188	Edit string problem Hey! Im trying to replace one char in my string with another one. Obviously i don't know what's wrong because then i would fix it. :P W/e, here's my code: Code: textBox4.Text[Convert.ToInt32(var)] = Convert.ToChar(var); The compiler sais: Code: Error 1 Property or indexer 'string.this[int]' cannot be assigned to -- it is read only C:\Users\HP-användare\Documents\Visual Studio 2008\Projects\Hangman\Hangman\Form1.cs 132 17 Hangman Thank you!
Livijn is offline

02-03-2008, 03:07 PM	#2
Livijn Registered User Join Date: Jan 2007 Posts: 188	I've googled it many times, but i can't find the answer. I can give you all the information about the code, just tell me.
Livijn is offline

02-03-2008, 03:22 PM	#3
Magos Confused Join Date: Sep 2001 Location: Sweden Posts: 3,125	Strings are immutable so you can't manually assign individual characters as you can in say C++. Look up the string methods Replace/Remove/Insert as they may be what you seek. __________________ MagosX.com Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime.
Magos is offline

02-04-2008, 01:26 AM	#4
Livijn Registered User Join Date: Jan 2007 Posts: 188	Thanks for your help!
Livijn is offline

02-16-2008, 06:25 AM	#6
Livijn Registered User Join Date: Jan 2007 Posts: 188	Got a question... How can i store a word so i can get it from all classes? This doesn't work, but you might understand what i want. Code: public struct holder { int io; } public class save() { holder save = new holder; save.io = 1; } public class print() { holder print = new holder; if (print.io != 1) { //true } } Well, the int io should stay at 1 not change. How do i do that?
Livijn is offline

02-16-2008, 09:40 PM	#7
AloneInTheDark Registered User Join Date: Feb 2008 Posts: 74	If you need to reach a variable from outside a class, you do it as "public ..." , if not "private ..." Code: public class MyClass(){ public string ThisVariableCanBeReached; private string ThisVariableCanNOTbeReached; } So you'll be able to use MyClass TEST = new MyClass(); TEST.ThisVariableCanBeReached = "bla bla"; If you need something which "doesn't change", try "public const" public const string ThisCanNotBeChanged = "Can't touch this!";
AloneInTheDark is offline

02-17-2008, 03:25 PM	#9
AloneInTheDark Registered User Join Date: Feb 2008 Posts: 74	Show me the code, not that weird long error without a line break in it!
AloneInTheDark is offline

02-18-2008, 01:10 PM	#10
Livijn Registered User Join Date: Jan 2007 Posts: 188	Well since my computer crashed, it will take a while before... I must recode all!
Livijn is offline

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