Invoke methods using reflection
/*
C#: The Complete Reference
by Herbert Schildt
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Invoke methods using reflection.
using System;
using System.Reflection;
class MyClass {
int x;
int y;
public MyClass(int i, int j) {
x = i;
y = j;
}
public int sum() {
return x+y;
}
public bool isBetween(int i) {
if((x < i) && (i < y)) return true;
else return false;
}
public void set(int a, int b) {
Console.Write("Inside set(int, int). ");
x = a;
y = b;
show();
}
// Overload set.
public void set(double a, double b) {
Console.Write("Inside set(double, double). ");
x = (int) a;
y = (int) b;
show();
}
public void show() {
Console.WriteLine("Values are x: {0}, y: {1}", x, y);
}
}
public class InvokeMethDemo {
public static void Main() {
Type t = typeof(MyClass);
MyClass reflectOb = new MyClass(10, 20);
int val;
Console.WriteLine("Invoking methods in " + t.Name);
Console.WriteLine();
MethodInfo[] mi = t.GetMethods();
// Invoke each method.
foreach(MethodInfo m in mi) {
// Get the parameters
ParameterInfo[] pi = m.GetParameters();
if(m.Name.CompareTo("set")==0 &&
pi[0].ParameterType == typeof(int)) {
object[] args = new object[2];
args[0] = 9;
args[1] = 18;
m.Invoke(reflectOb, args);
}
else if(m.Name.CompareTo("set")==0 &&
pi[0].ParameterType == typeof(double)) {
object[] args = new object[2];
args[0] = 1.12;
args[1] = 23.4;
m.Invoke(reflectOb, args);
}
else if(m.Name.CompareTo("sum")==0) {
val = (int) m.Invoke(reflectOb, null);
Console.WriteLine("sum is " + val);
}
else if(m.Name.CompareTo("isBetween")==0) {
object[] args = new object[1];
args[0] = 14;
if((bool) m.Invoke(reflectOb, args))
Console.WriteLine("14 is between x and y");
}
else if(m.Name.CompareTo("show")==0) {
m.Invoke(reflectOb, null);
}
}
}
}
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