C# extract single characters from a 'string'

Question

C# newbie...(again) Slowly getting used to String class (and everything else!) Wondering how to manipulate chars like a char[] array

My code below -

    private void sendString(String stringToSend)
    {
        for(int p=0; p < stringToSend.Length; p++)
        {
            // I want to select individual characters from stringToSend
            Console.Write(stringToSend);  **<< XX HERE ? XX**
            // followed by an inter-character delay
        }
    }

Of course, this works for the whole string. but I only want to send one charater at a time with a delay between chars. TIA

Just to be clear, you cannot manipulate individual chars in a string. In C#, strings are immutable, meaning that they cannot be changed after created. You can retrieve the individual chars using indexers (array notation), but you will need to convert the string to a char array if you want to manipulate them. — Abion47
– Abion47, Commented Dec 17, 2016 at 11:00

Sweeper · Accepted Answer · 2016-12-17 10:58:46Z

3

You can use the string's indexer to access its individual characters, like this:

private void sendString(String stringToSend)
{
    for(int p=0; p < stringToSend.Length; p++)
    {
        Console.Write(stringToSend[p]);
        Thread.Sleep(10);
    }
}

answered Dec 17, 2016 at 10:58

Sweeper

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2 Comments

Sweeper Over a year ago

They just call toString like this ComPort.Write(stringToSend[p].toString()) @MC

M C Over a year ago

Magic - thanks! C++ had all those meaningless colons, C# replaced them with meaningful () pairs!

Rajput · Accepted Answer · 2016-12-17 12:26:51Z

1

First solution is to use of indexer

 private void sendString(String stringToSend)
{
    for(int p=0; p < stringToSend.Length; p++)
    {
        Console.Write(stringToSend[p]);
        //delay code syntax here

    }
}

And second solution is to use ToCharArray function to convert string to character array.

    private void sendString(String stringToSend)
{
    char[] sendchar = stringToSend.ToCharArray();
            foreach (char item in sendchar)
            {
                Console.Write(item);
                //delay here
            }
}

But it's better to use first solution.Because that will simply iterate over string and using ToCharArray()will allocate new memory(Extra).

edited Dec 17, 2016 at 12:26

answered Dec 17, 2016 at 11:51

Rajput

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2 Comments

Abion47 Over a year ago

The ToCharArray is redundant. You can just as easily use a foreach on the string itself.

Rajput Over a year ago

Yes using ToCharArray() is a bit overhead also.

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