public BindingExpression(Binding binding, PropertyInfo targetProperty, object target)
{
if (binding == null)
throw new ArgumentNullException("binding");
if (targetProperty == null)
throw new ArgumentNullException("targetProperty");
if (target == null)
throw new ArgumentNullException("target");
Binding = binding;
Binding.Target = target;
TargetProperty = targetProperty;
if(string.IsNullOrEmpty(binding.TargetPath))
{
binding.TargetPath = targetProperty.Name;
}
object source = Binding.Source;
SourceProperty = source.GetType().GetNestedProperty(ref source, Binding.SourcePath, true);
Binding.Source = source;
}
public BindAttribute(string sourcePath, string targetPath)
{
Binding = new Binding(sourcePath, targetPath);
}
public BindAttribute(string targetPath)
{
Binding = new Binding(null, targetPath);
}
public BindAttribute()
{
Binding = new Binding();
}
public IBindingExpression SetBinding(string targetProperty, Binding binding)
{
return SetBinding(this, targetProperty, binding);
}
public IBindingExpression SetBinding(IBindable target, string targetProperty, Binding binding)
{
return BindingOperations.SetBinding(target, targetProperty, binding);
}
public static IBindingExpression SetBinding(IBindable target, string targetProperty, Binding binding)
{
if (target == null)
throw new ArgumentNullException("target");
if (string.IsNullOrEmpty(targetProperty))
throw new ArgumentNullException("targetProperty");
if (binding == null)
throw new ArgumentNullException("binding");
var binderKey =_Bindings.SingleOrDefault((kvp)=>kvp.Key.Object == target && kvp.Key.Property == targetProperty).Key;
IBindingExpression bindingExpression = null;
object nestedTarget = target;
var element = target as Element;
PropertyInfo propertyInfo = target.GetType().GetNestedProperty(ref nestedTarget, targetProperty, false);
var targetReady = propertyInfo != null && nestedTarget != null;
if (targetReady)
{
if (_BindingExpressions == null)
_BindingExpressions = new List<IBindingExpression>();
bindingExpression = GetBindingExpression(target, targetProperty);
if (bindingExpression == null)
{
bindingExpression = new BindingExpression(binding, propertyInfo, nestedTarget) { Element = element };
_BindingExpressions.Add(bindingExpression);
var INPC = bindingExpression.Binding.Source as INotifyPropertyChanged;
if (INPC != null)
{
INPC.PropertyChanged -= HandleDataContextPropertyChanged;
INPC.PropertyChanged += HandleDataContextPropertyChanged;
}
}
}
else
{
if (binderKey == null)
_Bindings.Add(new PropertyBinder() { Object = target, Property = targetProperty }, binding);
else
_Bindings[binderKey] = binding;
}
return bindingExpression;
}
