private void UpdateActionTarget(object oldTarget, object newTarget)
{
MethodInfo targetMethodInfo = null;
// If it's being set to the initial value, ignore it
// At this point, we're executing the View's InitializeComponent method, and the ActionTarget hasn't yet been assigned
// If they've opted to throw if the target is null, then this will cause that exception.
// We'll just wait until the ActionTarget is assigned, and we're called again
if (newTarget == View.InitialActionTarget)
{
return;
}
if (newTarget == null)
{
// If it's Enable or Disable we don't do anything - CanExecute will handle this
if (this.TargetNullBehaviour == ActionUnavailableBehaviour.Throw)
{
var e = new ActionTargetNullException(String.Format("ActionTarget on element {0} is null (method name is {1})", this.Subject, this.MethodName));
this.logger.Error(e);
throw e;
}
else
{
this.logger.Info("ActionTarget on element {0} is null (method name is {1}), but NullTarget is not Throw, so carrying on", this.Subject, this.MethodName);
}
}
else
{
var newTargetType = newTarget.GetType();
try
{
targetMethodInfo = newTargetType.GetMethod(this.MethodName);
if (targetMethodInfo == null)
{
this.logger.Warn("Unable to find method {0} on {1}", this.MethodName, newTargetType.Name);
}
else
{
this.AssertTargetMethodInfo(targetMethodInfo, newTargetType);
}
}
catch (AmbiguousMatchException e)
{
var ex = new AmbiguousMatchException(String.Format("Ambiguous match for {0} method on {1}", this.MethodName, newTargetType.Name), e);
this.logger.Error(ex);
throw ex;
}
}
this.TargetMethodInfo = targetMethodInfo;
this.OnTargetChanged(oldTarget, newTarget);
}
private void UpdateActionTarget(object oldTarget, object newTarget)
{
MethodInfo targetMethodInfo = null;
// If it's being set to the initial value, ignore it
// At this point, we're executing the View's InitializeComponent method, and the ActionTarget hasn't yet been assigned
// If they've opted to throw if the target is null, then this will cause that exception.
// We'll just wait until the ActionTarget is assigned, and we're called again
if (newTarget == View.InitialActionTarget)
return;
if (newTarget == null)
{
// If it's Enable or Disable we don't do anything - CanExecute will handle this
if (this.TargetNullBehaviour == ActionUnavailableBehaviour.Throw)
{
var e = new ActionTargetNullException(String.Format("ActionTarget on element {0} is null (method name is {1})", this.Subject, this.MethodName));
this.logger.Error(e);
throw e;
}
else
{
this.logger.Info("ActionTarget on element {0} is null (method name is {1}), but NullTarget is not Throw, so carrying on", this.Subject, this.MethodName);
}
}
else
{
var newTargetType = newTarget.GetType();
targetMethodInfo = newTargetType.GetMethod(this.MethodName);
if (targetMethodInfo == null)
this.logger.Warn("Unable to find method {0} on {1}", this.MethodName, newTargetType.Name);
else
this.AssertTargetMethodInfo(targetMethodInfo, newTargetType);
}
this.TargetMethodInfo = targetMethodInfo;
this.OnTargetChanged(oldTarget, newTarget);
}
