c# execute a string as code

Question

Here is what i want to do, and i know it is possible with perl, php, python and java, but i am working with c#

how can i do the following:

public voi         


        

Answer 1

Here are a couple utility methods which can handle class and instance method calls passed in as strings, with optional args and varargs.

This is NOT production code. It seems to work, at least with these trivial examples.

class Program
{
    static void Main(string[] args)
    {
        double alpha = Math.Sin(1.0);
        int beta = alpha.CompareTo(1.0);
        Console.WriteLine("{0} {1}", alpha, beta);

        double gamma = (double)CallClassMethod("System.Math.Sin", 1.0);
        int delta = (int)CallInstanceMethod(gamma, "CompareTo", 1.0);
        Console.WriteLine("{0} {1}", gamma, delta);

        string a = "abc";
        string x = "xyz";
        string r = String.Join(",", a, x);
        string s = r.Replace(",", ";");
        Console.WriteLine("{0} {1}", r, s);
        string t = (string)CallClassMethod("System.String.Join", ",", new String[] { a, x }); // Join takes varargs
        string u = (string)CallInstanceMethod(t, "Replace", ",", ";");
        Console.WriteLine("{0} {1}", t, u);
        Console.ReadKey();
    }

    static object CallClassMethod(string command, params object[] args)
    {
        Regex regex = new Regex(@"(.*)\.(\w*)");
        Match match = regex.Match(command);
        string className = match.Groups[1].Value;
        string methodName = match.Groups[2].Value;
        Type type = Type.GetType(className);
        List argTypeList = new List();
        foreach (object arg in args) { argTypeList.Add(arg.GetType()); }
        Type[] argTypes = argTypeList.ToArray();
        MethodInfo method = type.GetMethod(methodName, argTypes, null);
        return method.Invoke(null, args);
    }

    static object CallInstanceMethod(object instance, string methodName, params object[] args)
    {
        Type type = instance.GetType();
        List argTypeList = new List();
        foreach (object arg in args) { argTypeList.Add(arg.GetType()); }
        Type[] argTypes = argTypeList.ToArray();
        MethodInfo method = type.GetMethod(methodName, argTypes, null);
        return method.Invoke(instance, args);
    }
}