public static void DynamicInvoke()
{
A a1 = new A();
A a2 = new A();
B b1 = new B();
B b2 = new B();
DynamicInvokeDelegate testDelegate = DynamicInvokeTestFunction;
// Check that the delegate behaves as expected
A refParam = b2;
B outParam = null;
A returnValue = testDelegate(a1, b1, ref refParam, out outParam);
Assert.Same(returnValue, a1);
Assert.Same(refParam, b1);
Assert.Same(outParam, b2);
// Check dynamic invoke behavior
object[] parameters = new object[] { a1, b1, b2, null };
object retVal = testDelegate.DynamicInvoke(parameters);
Assert.Same(retVal, a1);
Assert.Same(parameters[2], b1);
Assert.Same(parameters[3], b2);
// Check invoke on a delegate that takes no parameters.
Action emptyDelegate = EmptyFunc;
emptyDelegate.DynamicInvoke(new object[] { });
emptyDelegate.DynamicInvoke(null);
}
public static void TestDynamicInvoke()
{
A a1 = new A();
A a2 = new A();
B b1 = new B();
B b2 = new B();
DynamicInvokeDelegate testDelegate = DynamicInvokeTestFunction;
// Check that the delegate behaves as expected
A refParam = b2;
B outParam = null;
A returnValue = testDelegate(a1, b1, ref refParam, out outParam);
Assert.True(RuntimeHelpers.ReferenceEquals(returnValue, a1));
Assert.True(RuntimeHelpers.ReferenceEquals(refParam, b1));
Assert.True(RuntimeHelpers.ReferenceEquals(outParam, b2));
// Check dynamic invoke behavior
object[] parameters = new object[4];
parameters[0] = a1;
parameters[1] = b1;
parameters[2] = b2;
parameters[3] = null;
object retVal = testDelegate.DynamicInvoke(parameters);
Assert.True(RuntimeHelpers.ReferenceEquals(retVal, a1));
Assert.True(RuntimeHelpers.ReferenceEquals(parameters[2], b1));
Assert.True(RuntimeHelpers.ReferenceEquals(parameters[3], b2));
// Check invoke on a delegate that takes no parameters.
Action emptyDelegate = EmptyFunc;
emptyDelegate.DynamicInvoke(new object[] { });
emptyDelegate.DynamicInvoke(null);
}
/// <summary>
/// 定义一个动态调用的委托。
/// </summary>
/// <param name="delegate"></param>
/// <returns></returns>
public static DynamicDelegate Define(DynamicInvokeDelegate @delegate)
{
return(new DynamicDelegate {
_delegate = @delegate
});
}
