private static void UpdateBinding(DependencyObject owner, EventBinding mbNew)
{
if (mbNew.DataContext != null)
{
object ctx = mbNew.DataContext;
BindingFlags flg = BindingFlags.Public | BindingFlags.Instance;
Type ctlType = owner.GetType();
Type ctxType = ctx.GetType();
foreach (var binding in mbNew.Bindings)
{
if (binding is CommandBinding)
{
CommandBinding cmdBinding = binding as CommandBinding;
EventInfo evt = ctlType.GetEvent(cmdBinding.EventName, flg);
if (evt == null)
{
continue;
}
PropertyInfo prop = ctxType.GetProperty(cmdBinding.TargetCommand, flg);
if (prop == null)
{
continue;
}
object cmd = prop.GetValue(ctx, null); // get the command
MethodInfo mthd = evt.EventHandlerType.GetMethod("Invoke"); // get the event handler
if (mthd != null)
{
var param = Ex.Parameter(typeof(EventArgs));
foreach (var p in mthd.GetParameters())
{
if (p.ParameterType != typeof(object))
{
param = Ex.Parameter(p.ParameterType, p.Name);
break;
}
}
var lam = Ex.Lambda(evt.EventHandlerType,
Ex.Call(Ex.Constant(cmd), "Execute", null, param),
Ex.Parameter(typeof(object)), param);
evt.AddEventHandler(owner, lam.Compile());
}
}
}
}
}
static Action <TObject, IEnumerable <object>, ILogger> BuildPropertySetter <TObject, TProperty>(string propertyName, Func <IEnumerable <object>, ILogger, TProperty> getter)
{
var obj = Ex.Parameter(typeof(TObject));
var values = Ex.Parameter(typeof(IEnumerable <object>));
var logger = Ex.Parameter(typeof(ILogger));
return(Ex
.Lambda <Action <TObject, IEnumerable <object>, ILogger> >(
Ex.Assign(
Ex.PropertyOrField(
obj,
propertyName),
Ex.Invoke(
Ex.Constant(getter),
values,
logger)),
obj,
values,
logger)
.Compile());
}