find substring in a string

[lsy]

is string provide any function that allow to calculate there is how many substring inside a string??
example: string str = "how are you?"
is it possible to tell how many "o" inside the str?

[dglienna]

Use the substring() command with a variable. when you find the string, move the variable past it, and then LOOP until you don't find it again.

that's actually pseudo-code that will solve the problem

[Shuja Ali]

Another way would be to use Regular expressions.

            string str = "how are you?";
            System.Text.RegularExpressions.Regex rx = new System.Text.RegularExpressions.Regex("o");
            int i = rx.Matches(str).Count;

[nabeelisnabeel]

Another way would be to use Regular expressions.

            string str = "how are you?";
            System.Text.RegularExpressions.Regex rx = new System.Text.RegularExpressions.Regex("o");
            int i = rx.Matches(str).Count;

Excellent.

[lsy]

Another way would be to use Regular expressions.

            string str = "how are you?";
            System.Text.RegularExpressions.Regex rx = new System.Text.RegularExpressions.Regex("o");
            int i = rx.Matches(str).Count;

Thank you very much....