CODEWITHSUNDEEP
c#arraysstringdatatableint
Debialo
Debialo

Reputation: 53

Calculate content of string to int

I'm trying to calculate the content of the string.

I've got 1 string which contains for example: MyString = "1+5/2*4-2" now I want to calculate the result of that string

I'm by the way new to c#

my code:

string som = "";
int myInt; 

private void getText_Click(object sender, EventArgs e)
{
    string s = (sender as Button).Text;
    som = som + s;
    Console.WriteLine(som);
    string[] words = som.Split(' ');

    foreach (string word in words)
    {
        Console.WriteLine(word);

        myInt += Convert.ToInt32(word);
    }

    Console.WriteLine(myInt);

I've tried this answer:

 double result = (double) new DataTable().Compute("1+1*4/2-5", null);
 int i = (int) result;  // -2

But then i get an System.InvalidCastException:

Specified cast is not valid.

Upvotes: 1

Views: 160

Answers (1)

Tim Schmelter
Tim Schmelter

Reputation: 460108

You can use the DataTable.Compute - "trick":

 double result = (double) new DataTable().Compute("1+1*4/2-5", null);
 int i = (int) result;  // -2

Syntax and supported operators are mentioned under Remarks here.

Upvotes: 8

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