Getting String from Char Array

Question

4.00/5 (1 vote)

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Hello,

In a program I need to manipulate the input string.
Simply I should put a comma ',' between each two letters of the string.

I used the code below but after modifying the string,
the modified string is not shown well. In other words, suppose

input string : 'Hello'
modified string : 'H,e,l,l,o'

but shown : System.String[]

string inp_str, mod_str; // Input string , modified string
            inp_str = textBox1.Text;
            
            int intLng = inp_str.Length;
            char[] chAray = new char[2*intLng];

            for (int i1 = 0; i1 < inp_str.Length; i1++)
            {
                chAray[2 * i1] = inp_str[i1];
                chAray[2 * i1 + 1] = ',';
            }

            mod_str = chAray.ToString();
            MessageBox.Show(mod_str);

Could you please help me?
Thanks a lot

Posted 27-Jun-11 21:52pm

ahhashemi

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4 solutions

Solution 2

MIDL

string inp_str, mod_str; 
inp_str = textBox1.Text;
mod_str = string.Join(",", inp_str.ToCharArray());
inp_str = textBox1.Text;

Posted 27-Jun-11 22:03pm

Kiran Sonawane

Comments

ahhashemi 28-Jun-11 5:46am

Dear Kiran Sonawane
Thank you very much for reading my question but the suggestion faced two errors bellow:

1. The best overloaded method match for 'string.Join(string, string[])' has some invalid arguments

2. Argument '2': cannot convert from 'char[]' to 'string[]'

Regards

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Pete O'Hanlon · Accepted Answer · 2011-06-27T21:58:00

Solution 1

An easy way to do this is to use

C#

mod_str = new string(chAray);

The new string constructor is a fast method for creating the string out of an array.

Posted 27-Jun-11 21:58pm

Pete O'Hanlon

Mario Majčica · Accepted Answer · 2011-06-27T23:26:00

Solution 4

Alternative 3 is the good one. However consider even this String concatenation using LINQ to create a CSV/PSV string[^]

Take care

Posted 27-Jun-11 23:26pm

Mario Majčica

Comments

Mario Majčica 28-Jun-11 7:00am

Down-voting without a comment? Really constructive...

UJimbo · Accepted Answer · 2011-06-27T23:08:00

inp_str = textBox1.Text;
int intLng = inp_str.Length;
char[] chAray = new char[2 * intLng];
for (int i1 = 0; i1 < inp_str.Length; i1++)
{
   chAray[2 * i1] = inp_str[i1];
   chAray[2 * i1 + 1] = ',';
}

foreach (var item in chAray)
{
   mod_str += item;
}
MessageBox.Show(mod_str);

You might need to change the conversion a bit, because your code adds a comma even after the last character and it ends up looking like:
e,x,a,m,p,l,e,

Might I also suggest you use a StringBuilder type for mod_str and append each character to that, instead of concatenating characters to a String.

Take care