Utilize MyClass without assuming any prior knowledge
/*
C#: The Complete Reference
by Herbert Schildt
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Utilize MyClass without assuming any prior knowledge.
using System;
using System.Reflection;
public class ReflectAssemblyDemo1 {
public static void Main() {
int val;
Assembly asm = Assembly.LoadFrom("MyClasses.exe");
Type[] alltypes = asm.GetTypes();
Type t = alltypes[0]; // use first class found
Console.WriteLine("Using: " + t.Name);
ConstructorInfo[] ci = t.GetConstructors();
// Use first constructor found.
ParameterInfo[] cpi = ci[0].GetParameters();
object reflectOb;
if(cpi.Length > 0) {
object[] consargs = new object[cpi.Length];
// initialize args
for(int n=0; n < cpi.Length; n++)
consargs[n] = 10 + n * 20;
// construct the object
reflectOb = ci[0].Invoke(consargs);
} else
reflectOb = ci[0].Invoke(null);
Console.WriteLine("\nInvoking methods on reflectOb.");
Console.WriteLine();
// Ignore inherited methods.
MethodInfo[] mi = t.GetMethods(BindingFlags.DeclaredOnly |
BindingFlags.Instance |
BindingFlags.Public) ;
// Invoke each method.
foreach(MethodInfo m in mi) {
Console.WriteLine("Calling {0} ", m.Name);
// Get the parameters
ParameterInfo[] pi = m.GetParameters();
// Execute methods.
switch(pi.Length) {
case 0: // no args
if(m.ReturnType == typeof(int)) {
val = (int) m.Invoke(reflectOb, null);
Console.WriteLine("Result is " + val);
}
else if(m.ReturnType == typeof(void)) {
m.Invoke(reflectOb, null);
}
break;
case 1: // one arg
if(pi[0].ParameterType == typeof(int)) {
object[] args = new object[1];
args[0] = 14;
if((bool) m.Invoke(reflectOb, args))
Console.WriteLine("14 is between x and y");
else
Console.WriteLine("14 is not between x and y");
}
break;
case 2: // two args
if((pi[0].ParameterType == typeof(int)) &&
(pi[1].ParameterType == typeof(int))) {
object[] args = new object[2];
args[0] = 9;
args[1] = 18;
m.Invoke(reflectOb, args);
}
else if((pi[0].ParameterType == typeof(double)) &&
(pi[1].ParameterType == typeof(double))) {
object[] args = new object[2];
args[0] = 1.12;
args[1] = 23.4;
m.Invoke(reflectOb, args);
}
break;
}
Console.WriteLine();
}
}
}
//==============================================================
/*
C#: The Complete Reference
by Herbert Schildt
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// A file that contains three classes. Call this file MyClasses.cs.
using System;
class MyClass {
int x;
int y;
public MyClass(int i) {
Console.WriteLine("Constructing MyClass(int). ");
x = y = i;
show();
}
public MyClass(int i, int j) {
Console.WriteLine("Constructing MyClass(int, int). ");
x = i;
y = j;
show();
}
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);
}
}
class AnotherClass {
string remark;
public AnotherClass(string str) {
remark = str;
}
public void show() {
Console.WriteLine(remark);
}
}
public class Demo12 {
public static void Main() {
Console.WriteLine("This is a placeholder.");
}
}
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