Writing Dynamic Code using .NET Reflection

Namespace: System.Reflection

Creating Objects Dynamically:

String AssemblyPath = @“C:\windwos\....\framework\v2……\mscorlib.dll”;

Assembly asmMSCORLIB = Assembly.LoadFile(AssemblyPath);

Type hashTableType = asmMSCORLIB.GetType(“System.Collections.HashTable”);

Type [] constructorArgs = Type.EmptyTypes;

OR

Type [] constructorArgs = new Type[] { typeof(int) };

ConstructorInfo hashTableConstructor = hashTableType.GetConstructor( constructorArgs);

Object hashTable = hashTableConstructor.Invoke( new object[] {} );

Invoking Methods:

MethodInfo hashTableAddMethod = hashTableType.GetMethod(“ADD”);

hashTableAddMethod.Invoke(hashTable, new object[] {“ThisIsKey”, “ItsValue”});

PropertyInfo hashTableCountProperty = hashTableType.GetProperty(“Count”);

Int TotalElements = (int) prop.GetValue(newHash, null);

Invoking Static Methods:

Type ConsoleType = typeof(console);

MethodInfo ConsoleDotWriteLine = ConsoleType.GetMethod(“WriteLine”,

new Type[] {typeof(string)});

ConsoleDotWriteLine.Invoke(null, new object[] { TotalElements.ToString() } );

For Fields use GetValue and SetValue methods.

For EventInfo use AddEventHandler and RemoveEventHandler.