internal void OnPropertyChanged(object source, PropertyChangedEventArgs eventArgs)
{
Util.CheckArgumentNull(source, "source");
Util.CheckArgumentNull(eventArgs, "eventArgs");
#if DEBUG
Debug.Assert(this.bindingGraph.IsTracking(source), "Entity must be part of the graph if it has the event notification registered.");
#endif
string sourceProperty = eventArgs.PropertyName;
if (String.IsNullOrEmpty(sourceProperty))
{
this.HandleUpdateEntity(
source,
null,
null);
}
else
{
BindingEntityInfo.BindingPropertyInfo bpi;
object sourcePropertyValue = BindingEntityInfo.GetPropertyValue(source, sourceProperty, out bpi);
if (bpi != null)
{
this.bindingGraph.RemoveRelation(source, sourceProperty);
switch (bpi.PropertyKind)
{
case BindingPropertyKind.BindingPropertyKindCollection:
if (sourcePropertyValue != null)
{
try
{
typeof(BindingUtils)
.GetMethod("VerifyObserverNotPresent", BindingFlags.NonPublic | BindingFlags.Static)
.MakeGenericMethod(bpi.PropertyInfo.CollectionType)
.Invoke(null, new object[] { sourcePropertyValue, sourceProperty, source.GetType() });
}
catch (TargetInvocationException tie)
{
throw tie.InnerException;
}
try
{
this.AttachBehavior = true;
this.bindingGraph.AddCollection(
source,
sourceProperty,
sourcePropertyValue,
null);
}
finally
{
this.AttachBehavior = false;
}
}
break;
case BindingPropertyKind.BindingPropertyKindEntity:
this.bindingGraph.AddEntity(
source,
sourceProperty,
sourcePropertyValue,
null,
source);
break;
default:
Debug.Assert(bpi.PropertyKind == BindingPropertyKind.BindingPropertyKindComplex, "Must be complex type if PropertyKind is not entity or collection.");
if (sourcePropertyValue != null)
{
this.bindingGraph.AddComplexProperty(
source,
sourceProperty,
sourcePropertyValue);
}
this.HandleUpdateEntity(
source,
sourceProperty,
sourcePropertyValue);
break;
}
}
else
{
this.HandleUpdateEntity(
source,
sourceProperty,
sourcePropertyValue);
}
}
}
internal void OnPropertyChanged(object source, PropertyChangedEventArgs eventArgs)
{
Util.CheckArgumentNull(source, "source");
Util.CheckArgumentNull(eventArgs, "eventArgs");
#if DEBUG
Debug.Assert(this.bindingGraph.IsTracking(source), "Entity must be part of the graph if it has the event notification registered.");
#endif
string sourceProperty = eventArgs.PropertyName;
// When sourceProperty is null, it is assumed that all properties for the object changed
// As a result, we should be performing an UpdateObject operation on the context.
if (String.IsNullOrEmpty(sourceProperty))
{
this.HandleUpdateEntity(
source,
null,
null);
}
else
{
BindingEntityInfo.BindingPropertyInfo bpi;
// Get the new value for the changed property.
object sourcePropertyValue = BindingEntityInfo.GetPropertyValue(source, sourceProperty, out bpi);
// Check if it is an interesting property e.g. collection, entity reference or complex type.
if (bpi != null)
{
// Disconnect the edge between source and original source property value.
this.bindingGraph.RemoveRelation(source, sourceProperty);
switch (bpi.PropertyKind)
{
case BindingPropertyKind.BindingPropertyKindCollection:
// If collection is already being tracked by the graph we can not have > 1 links to it.
if (sourcePropertyValue != null)
{
// Make sure that there is no observer on the input collection property.
try
{
typeof(BindingUtils)
.GetMethod("VerifyObserverNotPresent", BindingFlags.NonPublic | BindingFlags.Static)
.MakeGenericMethod(bpi.PropertyInfo.CollectionType)
.Invoke(null, new object[] { sourcePropertyValue, sourceProperty, source.GetType() });
}
catch (TargetInvocationException tie)
{
throw tie.InnerException;
}
try
{
this.AttachBehavior = true;
this.bindingGraph.AddCollection(
source,
sourceProperty,
sourcePropertyValue,
null);
}
finally
{
this.AttachBehavior = false;
}
}
break;
case BindingPropertyKind.BindingPropertyKindEntity:
// Add the newly added entity to the graph, or update entity reference.
this.bindingGraph.AddEntity(
source,
sourceProperty,
sourcePropertyValue,
null,
source);
break;
default:
Debug.Assert(bpi.PropertyKind == BindingPropertyKind.BindingPropertyKindComplex, "Must be complex type if PropertyKind is not entity or collection.");
// Attach the newly assigned complex type object and it's child complex typed objects.
if (sourcePropertyValue != null)
{
this.bindingGraph.AddComplexProperty(
source,
sourceProperty,
sourcePropertyValue);
}
this.HandleUpdateEntity(
source,
sourceProperty,
sourcePropertyValue);
break;
}
}
else
{
// For non-interesting properties i.e. value types or regular collection properties we simply call UpdateObject on the context.
// Note that this code also handles primitive properties of complex typed objects.
this.HandleUpdateEntity(
source,
sourceProperty,
sourcePropertyValue);
}
}
}
