private SourceProperty GetSourceProperty(string path, object container)
{
string[] parts = path.Split('.');
string leftMost = parts[0];
string leftMostName = GetName(leftMost);
int leftMostIndexer = 0;
SourceProperty result = new SourceProperty {
OwningInstance = container
};
if (!string.IsNullOrEmpty(leftMost))
{
PropertyDescriptor pDescriptor = TypeDescriptor.GetProperties(container).Find(leftMostName, true);
if (pDescriptor != null)
{
result.Descriptor = pDescriptor;
object pValue = pDescriptor.GetValue(container);
//this is the dataitem from the viewstate
IEnumerable enumerablePValue = pValue as IEnumerable;
if (enumerablePValue != null && !(pValue is string))
{
if (TryGetIndexer(leftMost, out leftMostIndexer))
{
pValue = enumerablePValue.GetByIndex(leftMostIndexer);
}
}
if (pValue != null)
{
result.Value = pValue;
//remove the current section and retest
path = path.TrimStart(parts[0].ToCharArray());
path = path.TrimStart(new char[] { '.' });
string[] newParts = path.Split('.');
if (newParts[0] != string.Empty)
{
result = GetSourceProperty(path, pValue);
}
return(result);
}
}
}
return(result);
}
//TODO: Should probably be a member of binding.
private void SetProperty(BindingDef binding, object value)
{
SourceProperty property = binding.SourceExpression.ResolveAsSource(this.DataContext);
if (property != null && property.Descriptor != null && !property.Descriptor.IsReadOnly)
{
object convertedValue = null;
Type destinationType = property.Descriptor.PropertyType;
if (binding.HasValueConverter)
{
IValueConverter valueConverter = binding.GetValueConverterInstance();
convertedValue = valueConverter.ConvertBack(value, property.Descriptor.PropertyType, null, null);
}
else
{
if (TypeHelper.IsSimpleType(value.GetType()) && TypeHelper.IsSimpleType(destinationType))
{
convertedValue = Convert.ChangeType(value, destinationType);
}
else
{
TypeConverter converter = TypeDescriptor.GetConverter(destinationType);
if (converter != null)
{
convertedValue = converter.ConvertFrom(value);
}
else
{
converter = TypeDescriptor.GetConverter(value.GetType());
if (converter != null)
{
convertedValue = converter.ConvertTo(value, destinationType);
}
}
}
}
property.Descriptor.SetValue(property.OwningInstance, convertedValue);
}
}
private void ExecuteCommandBind(IBindingTarget control, BindingDef binding)
{
//Get the ICommandObject from the source
SourceProperty commandInstance = binding.SourceExpression.ResolveAsSource(this.DataContext);
object commandObject = commandInstance.Value;
ICommand iCommand = commandObject as ICommand;
//Get the property setter for the event to which we will bind
TargetEvent evt = binding.ResolveAsTargetEvent(this.bindingContainer);
//bind
Type eventDelegateType = evt.Descriptor.EventHandlerType;
Delegate handler = new EventHandler((s, e) => iCommand.Execute(this));
evt.Descriptor.GetAddMethod().Invoke(evt.OwningControl, new object[] { handler });
control.Visible = iCommand.CanExecute(this);
//listen to canExecuteChanged
iCommand.CanExecuteChanged += new EventHandler((s, e) => control.Visible = iCommand.CanExecute(this));
}
