/// <summary>
/// Invoked when a new non-null target is set, which has non-null MethodInfo. Used to assert that the method signature is correct
/// </summary>
/// <param name="targetMethodInfo">MethodInfo of method on new target</param>
/// <param name="newTargetType">Type of new target</param>
protected internal override void AssertTargetMethodInfo(MethodInfo targetMethodInfo, Type newTargetType)
{
var methodParameters = targetMethodInfo.GetParameters();
if (methodParameters.Length > 1)
{
var e = new ActionSignatureInvalidException(String.Format("Method {0} on {1} must have zero or one parameters", MethodName, newTargetType.Name));
logger.Error(e);
throw e;
}
}
/// <summary>
/// Invoked when a new non-null target is set, which has non-null MethodInfo. Used to assert that the method signature is correct
/// </summary>
/// <param name="targetMethodInfo">MethodInfo of method on new target</param>
/// <param name="newTargetType">Type of new target</param>
protected internal override void AssertTargetMethodInfo(MethodInfo targetMethodInfo, Type newTargetType)
{
var methodParameters = targetMethodInfo.GetParameters();
if (!(methodParameters.Length == 0 ||
(methodParameters.Length == 1 && (typeof(EventArgs).IsAssignableFrom(methodParameters[0].ParameterType) || methodParameters[0].ParameterType == typeof(DependencyPropertyChangedEventArgs))) ||
(methodParameters.Length == 2 && (typeof(EventArgs).IsAssignableFrom(methodParameters[1].ParameterType) || methodParameters[1].ParameterType == typeof(DependencyPropertyChangedEventArgs)))))
{
var e = new ActionSignatureInvalidException(String.Format("Method {0} on {1} must have the signatures void Method(), void Method(EventArgsOrSubClass e), or void Method(object sender, EventArgsOrSubClass e)", MethodName, newTargetType.Name));
logger.Error(e);
throw e;
}
}