C# how to get sum of digits of number in textbox

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For example in textbox i have written 1020,when i will click on Explode button, it will show 3 in textbox, because 1+0+2+0=3.

What I have tried:

I have tired like this`

int total = 0;
total = int.Parse(button1.Text) + int.Parse(button2.Text) + int.Parse(button3.Text) + int.Parse(button4.Text) + int.Parse(button5.Text) + int.Parse(button6.Text) + int.Parse(button7.Text) + int.Parse(button8.Text) + int.Parse(button9.Text) + int.Parse(button11.Text);
textbox.Text = total.ToString();

But in this case when i click on Explode button it always show 45` because 1+2+3+4+5+6+7+8+9=45.
How can i write this code, in order it show me sum of my input numbers?

Posted 22-Feb-18 7:20am

Suren97

Updated 22-Feb-18 10:46am

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4 solutions

Solution 3

Alternatively to solution #1 by RickZeeland[^], i'd provide Linq solution:

C#

string mytext = "1020";
int sumOfChars = mytext.Sum(x=>Convert.ToInt32(x.ToString())); //3

Posted 22-Feb-18 7:40am

Maciej Los

Comments

phil.o 22-Feb-18 13:53pm

5 :)

Maciej Los 22-Feb-18 13:54pm

Thank you, Phil.

RickZeeland 22-Feb-18 13:57pm

Elegant, 5d !

Maciej Los 22-Feb-18 13:58pm

Thank you, Rick.

Solution 4

Have more:

int num = "1020".Sum(n => n & 15);

int sum = (int)"1020".Sum(n => Char.GetNumericValue(n));

Note: 'GetNumericValue returns a double, and I find that strange.

Posted 22-Feb-18 10:46am

BillWoodruff

Updated 22-Feb-18 11:03am

v2

Comments

Richard Deeming 23-Feb-18 9:59am

+5. Much more efficient than converting each char to a string and then parsing it back to an int! :)

Char.GetNumericValue[^] returns a double because some characters represent fractions. For example:

* \u00BC = ¼ = 0.25
* \u00BD = ½ = 0.5
* \u00BE = ¾ = 0.75

BillWoodruff 23-Feb-18 12:11pm

Thanks, Richard, I thought it might have something to do with Unicode, but, never thought of fractions :)

Solution 1

If you want to enter your data into a single textbox, let's start there.
Instead of looking at the value in each of 11 text boxes like you currently have, create a loop to look at each position in the data entered into a single text box.
Then, add the value of each position to your total.

Given this, you should be able to write the code.
If after writing the code to use a loop, you still have a question, post your modified code.

Posted 22-Feb-18 7:25am

Tim Carmichael

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RickZeeland · Accepted Answer · 2018-02-22T07:26:00

Solution 2

Try this:

int total = 0;

foreach (char ch in this.textBox1.Text)
{
    total += int.Parse(ch.ToString());
}

this.textBox1.Text = total.ToString();

Posted 22-Feb-18 7:26am

RickZeeland

Comments

Suren97 22-Feb-18 13:28pm

Thank you soo much :)

Maciej Los 22-Feb-18 13:37pm

5ed!

phil.o 22-Feb-18 13:52pm

My 5 too.

RickZeeland 22-Feb-18 13:54pm

Muchas gracias !