how to split number from textbox in c#

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Hi i have a text box and i have some numbers in my text box like this

C#

4*4*4*4*4*4*4*4*4*7*4*4*4*7*4*4*4*4*7*4*10*4*4*4*7*4*10*13*0,0,4,0,4,3,0,4,3,0,0,4,3,0,4,0,4,3,0,4,0,0,4,3,0,4,0,4,0,4,3,0,4,0,4,4,0,4,3,0,4,0,4,4,-1,

now i want to split them like this
number which has "*", i want to calculate one by one of those number + 5 and "," one by one +2 and write them in another textbox
and this is my code

C#

foreach (var c in richTextBox6.Text)
{
    string a = c.ToString();
    string[] b = a.Split('*');
    richTextBox7.Text += b[a.Length - 1];
}

but it just spli "*" and ","
how calculate those numbers one by one?
With Respect

Posted 7-Apr-15 8:25am

Avenger1

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Comments

Maciej Los 7-Apr-15 14:42pm

What you mean: "i want to calculate one by one of those number + 5"? Do you mean add operation?

Avenger1 7-Apr-15 14:48pm

the number has "*" +5 like this
4+5
13+5
7+5
4+5
.
.
.

Maciej Los 7-Apr-15 14:55pm

Not clear... As far as i see you want to get sum of (number+5) when separator is *, and sum of (number+2) when separator is ,. Am i right? PLease, use "Reply" widget.

2 solutions

Solution 2

Using Linq[^]:

C#

string s = RichTextBox6.Text;
//in this example: 4*4*4*4*4*4*4*4*4*7*4*4*4*7*4*4*4*4*7*4*10*4*4*4*7*4*10*13*0,0,4,0,4,3,0,4,3,0,0,4,3,0,4,0,4,3,0,4,0,0,4,3,0,4,0,4,0,4,3,0,4,0,4,4,0,4,3,0,4,0,4,4,-1,
var addAndFive = s.Split(',')[0].Split('*').Sum(x=>Convert.ToInt32(x)+5);
//returns: 290
var addAndTwo = s.Split(',').Skip(1).Sum(x=>x == string.Empty ? 0 : Convert.ToInt32(x)+2);
//returns: 180

Posted 7-Apr-15 9:12am

Maciej Los

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DamithSL · Accepted Answer · 2015-04-07T08:49:00

you can replace * with +5+ and , with +2+ and build math expression, then you can use mathematical expression evaluator library like http://ncalc.codeplex.com/[^] to evaluate final result.

or without other library [^]

C#

void Main()
{
	string input ="4*4,4,-4";
	input= input.Replace("*", "+5+");
	input =input.Replace(",", "+2+"); //4+5+4+2+4+2+-4
	var result = Evaluate(input); //17
}

double Evaluate(string expression)
{
	DataTable table = new DataTable();
	table.Columns.Add("expression", typeof(string), expression);
	DataRow row = table.NewRow();
	table.Rows.Add(row);
	return double.Parse((string)row["expression"]);
}