String again

[ma]

Hello,
I want to change one character in a string to a new character. How can i
do this. For example I have a string called x and it contains "This is a
test" and I want to change the i in is to a so after change it become "This
as a test". I tried the following code without any sucess:

public void ChangeChar(int index,char NewChar)

{

m_MyString.Remo ve(Index);

m_Privilage.Ins ert(Index,NewCh ar);

}

How can I convert a char to a string? How can I convert a char to char *?



Regards

[zacks@construction-imaging.com]

Re: String again

On Oct 2, 10:47 am, "ma" <m...@nowhere.c omwrote:

Hello,
I want to change one character in a string to a new character. How can i
do this. For example I have a string called x and it contains "This is a
test" and I want to change the i in is to a so after change it become "This
as a test". I tried the following code without any sucess:
>
public void ChangeChar(int index,char NewChar)
>
{
>
m_MyString.Remo ve(Index);
>
m_Privilage.Ins ert(Index,NewCh ar);
>
}
>
How can I convert a char to a string? How can I convert a char to char *?
>
Regards

I take it you missed the String.Replace method when you searched the
help text?

[Nicholas Paldino [.NET/C# MVP]]

Re: String again

ma,

You will have to return the new string. Strings are immutable, so you
can't change the contents (at least, not without bending over backwards).
You really want to do this:

public void ChangeChar(int index, char newChar)
{
// Remove the character first.
m_MyString = m_MyString.Remo ve(index);

// Insert the character.
m_MyString = m_MyString.Inse rt(index, newChar);
}

I changed the code so that you are changing the same variable. You were
not doing that in your original posted code.


--
- Nicholas Paldino [.NET/C# MVP]
- mvp@spam.guard. caspershouse.co m

"ma" <ma@nowhere.com wrote in message
news:O8$4iMQBIH A.4200@TK2MSFTN GP04.phx.gbl...

Hello,
I want to change one character in a string to a new character. How can
i do this. For example I have a string called x and it contains "This is a
test" and I want to change the i in is to a so after change it become
"This as a test". I tried the following code without any sucess:
>
public void ChangeChar(int index,char NewChar)
>
{
>
m_MyString.Remo ve(Index);
>
m_Privilage.Ins ert(Index,NewCh ar);
>
}
>
How can I convert a char to a string? How can I convert a char to char *?
>
>
>
Regards
>
>
>
>

[Hans Kesting]

Re: String again

ma used his keyboard to write :

Hello,
I want to change one character in a string to a new character. How can i
do this. For example I have a string called x and it contains "This is a
test" and I want to change the i in is to a so after change it become "This
as a test". I tried the following code without any sucess:
>
public void ChangeChar(int index,char NewChar)
>
{
>
m_MyString.Remo ve(Index);
>
m_Privilage.Ins ert(Index,NewCh ar);
>
}
>
How can I convert a char to a string? How can I convert a char to char *?
>
>
>
Regards

As mentioned before, you can not change the contents of a String. You
can however build a new string and replace the previous reference.
So build a new string: part before the insert, the new char, part after
the insert.

You might also want to look into StringBuilder (namespace System.Text),
which does have an Insert method.

Hans Kesting

[ma]

Re: String again

Thanks,
But the code doesn't compile with error code that it can not convert char to
string.
How can I change char to string? Note that it is not char * but char.

Regards




"Nicholas Paldino [.NET/C# MVP]" <mvp@spam.guard .caspershouse.c omwrote in
message news:u$L5IWQBIH A.1168@TK2MSFTN GP02.phx.gbl...

ma,
>
You will have to return the new string. Strings are immutable, so you
can't change the contents (at least, not without bending over backwards).
You really want to do this:
>
public void ChangeChar(int index, char newChar)
{
// Remove the character first.
m_MyString = m_MyString.Remo ve(index);
>
// Insert the character.
m_MyString = m_MyString.Inse rt(index, newChar);
}
>
I changed the code so that you are changing the same variable. You
were not doing that in your original posted code.
>
>
--
- Nicholas Paldino [.NET/C# MVP]
- mvp@spam.guard. caspershouse.co m
>
"ma" <ma@nowhere.com wrote in message
news:O8$4iMQBIH A.4200@TK2MSFTN GP04.phx.gbl...

>Hello,
> I want to change one character in a string to a new character. How can
>i do this. For example I have a string called x and it contains "This is
>a test" and I want to change the i in is to a so after change it become
>"This as a test". I tried the following code without any sucess:
>>
>public void ChangeChar(int index,char NewChar)
>>
>{
>>
>m_MyString.Rem ove(Index);
>>
>m_Privilage.In sert(Index,NewC har);
>>
>}
>>
>How can I convert a char to a string? How can I convert a char to char *?
>>
>>
>>
>Regards
>>
>>
>>
>>

>
>

[ma]

Re: String again


<zacks@construc tion-imaging.comwrot e in message
news:1191337725 .369451.28600@2 2g2000hsm.googl egroups.com...

On Oct 2, 10:47 am, "ma" <m...@nowhere.c omwrote:

>Hello,
> I want to change one character in a string to a new character. How
>can i
>do this. For example I have a string called x and it contains "This is a
>test" and I want to change the i in is to a so after change it become
>"This
>as a test". I tried the following code without any sucess:
>>
>public void ChangeChar(int index,char NewChar)
>>
>{
>>
>m_MyString.Rem ove(Index);
>>
>m_Privilage.In sert(Index,NewC har);
>>
>}
>>
>How can I convert a char to a string? How can I convert a char to char *?
>>
>Regards

>
I take it you missed the String.Replace method when you searched the
help text?
>

Thanks.
Replace change all occurrence of the char with new ones but I want to
replace one specific one with a new one.

Regards

[Nicholas Paldino [.NET/C# MVP]]

Re: String again

You can call ToString on the character, like so:


public void ChangeChar(int index, char newChar)
{
// Remove the character first.
m_MyString = m_MyString.Remo ve(index);

// Insert the character.
m_MyString = m_MyString.Inse rt(index, newChar.ToStrin g());
}


--
- Nicholas Paldino [.NET/C# MVP]
- mvp@spam.guard. caspershouse.co m

"Nicholas Paldino [.NET/C# MVP]" <mvp@spam.guard .caspershouse.c omwrote in
message news:u$L5IWQBIH A.1168@TK2MSFTN GP02.phx.gbl...

ma,
>
You will have to return the new string. Strings are immutable, so you
can't change the contents (at least, not without bending over backwards).
You really want to do this:
>
public void ChangeChar(int index, char newChar)
{
// Remove the character first.
m_MyString = m_MyString.Remo ve(index);
>
// Insert the character.
m_MyString = m_MyString.Inse rt(index, newChar);
}
>
I changed the code so that you are changing the same variable. You
were not doing that in your original posted code.
>
>
--
- Nicholas Paldino [.NET/C# MVP]
- mvp@spam.guard. caspershouse.co m
>
"ma" <ma@nowhere.com wrote in message
news:O8$4iMQBIH A.4200@TK2MSFTN GP04.phx.gbl...

>Hello,
> I want to change one character in a string to a new character. How can
>i do this. For example I have a string called x and it contains "This is
>a test" and I want to change the i in is to a so after change it become
>"This as a test". I tried the following code without any sucess:
>>
>public void ChangeChar(int index,char NewChar)
>>
>{
>>
>m_MyString.Rem ove(Index);
>>
>m_Privilage.In sert(Index,NewC har);
>>
>}
>>
>How can I convert a char to a string? How can I convert a char to char *?
>>
>>
>>
>Regards
>>
>>
>>
>>

>
>

[Ben Voigt [C++ MVP]]

Re: String again


"ma" <ma@nowhere.com wrote in message
news:O8$4iMQBIH A.4200@TK2MSFTN GP04.phx.gbl...

Hello,
I want to change one character in a string to a new character. How can
i do this. For example I have a string called x and it contains "This is a
test" and I want to change the i in is to a so after change it become
"This as a test". I tried the following code without any sucess:
>
public void ChangeChar(int index,char NewChar)
>
{
>
m_MyString.Remo ve(Index);
>
m_Privilage.Ins ert(Index,NewCh ar);
>
}
>
How can I convert a char to a string? How can I convert a char to char *?

See string.ToCharAr ray(), once you have an array you can overwrite any
character at will.

[bob]

Re: String again


Hi ma,
If your string varies then perhaps you should be using regular
expressions to find and replace. See regex class
regards
Bob

On Tue, 2 Oct 2007 15:47:34 +0100, "ma" <ma@nowhere.com wrote:

>Hello,
I want to change one character in a string to a new character. How can i
>do this. For example I have a string called x and it contains "This is a
>test" and I want to change the i in is to a so after change it become "This
>as a test". I tried the following code without any sucess:
>
>public void ChangeChar(int index,char NewChar)
>
>{
>
>m_MyString.Rem ove(Index);
>
>m_Privilage.In sert(Index,NewC har);
>
>}
>
>How can I convert a char to a string? How can I convert a char to char *?
>
>
>
>Regards
>
>
>

[Jesse Houwing]

Re: String again

Hello Bob,

Hi ma,
If your string varies then perhaps you should be using regular
expressions to find and replace. See regex class
regards
Bob
On Tue, 2 Oct 2007 15:47:34 +0100, "ma" <ma@nowhere.com wrote:
>

>Hello,
>I want to change one character in a string to a new character. How
>can i
>do this. For example I have a string called x and it contains "This
>is a
>test" and I want to change the i in is to a so after change it become
>"This
>as a test". I tried the following code without any sucess:
>public void ChangeChar(int index,char NewChar)
>>
>{
>>
>m_MyString.Rem ove(Index);
>>
>m_Privilage.In sert(Index,NewC har);
>>
>}
>>
>How can I convert a char to a string? How can I convert a char to
>char *?

As a string is an immutable type in .NEt you'd have to change your code a
bit:

public string ChangeChar(int index,char NewChar)
{
return m_MyString.Remo ve(Index).Inser t(Index,NewChar );
}


Or you might be able to use a ref parameter:

public void ChangeChar(ref string input, int index,char NewChar)
{
input = input.Remove(In dex).Insert(Ind ex,NewChar);
}

Also consider that if you're going to search and replace many characters
in your string, it might be much faster to do all the manipulations on a
StringBuilder instead.
--
Jesse Houwing
jesse.houwing at sogeti.nl