public BindingExpression(Binding binding, MemberInfo 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 viewSource = Binding.Source;
_ViewProperty = viewSource.GetType().GetNestedMember(ref viewSource, Binding.SourcePath, true);
Binding.ViewSource = viewSource;
var dataContext = viewSource as IDataContext;
if (dataContext != null && dataContext.DataContext != null)
{
var source = dataContext.DataContext;
SourceProperty = source.GetType().GetNestedMember(ref source, Binding.SourcePath, true);
Binding.Source = source;
}
}
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 IElement;
var name = string.Concat(targetProperty, "Property.Value");
MemberInfo memberInfo = target.GetType().GetNestedMember(ref nestedTarget, name, false);
if (memberInfo != null)
{
binding.TargetPath = name;
binding.Target = nestedTarget;
}
else
{
nestedTarget = target;
memberInfo = target.GetType().GetNestedMember(ref nestedTarget, targetProperty, false);
}
var targetReady = memberInfo != null && nestedTarget != null;
if (targetReady)
{
if (_BindingExpressions == null)
_BindingExpressions = new List<IBindingExpression>();
bindingExpression = GetBindingExpression(target, targetProperty);
if (bindingExpression == null)
{
bindingExpression = new BindingExpression(binding, memberInfo, nestedTarget) { Element = element };
_BindingExpressions.Add(bindingExpression);
var vmINPC = bindingExpression.Binding.Source as INotifyPropertyChanged;
if (vmINPC != null)
{
vmINPC.PropertyChanged -= HandleDataContextPropertyChanged;
vmINPC.PropertyChanged += HandleDataContextPropertyChanged;
}
var viewINPC = bindingExpression.Binding.ViewSource as INotifyPropertyChanged;
if (viewINPC != null)
{
viewINPC.PropertyChanged -= HandleDataContextPropertyChanged;
viewINPC.PropertyChanged += HandleDataContextPropertyChanged;
}
}
}
else
{
if (binderKey == null)
_Bindings.Add(new PropertyBinder() { Object = target, Property = targetProperty }, binding);
else
_Bindings[binderKey] = binding;
}
return bindingExpression;
}
public BindAttribute(string sourcePath, string targetPath)
{
Binding = new Binding(sourcePath, targetPath);
}
public BindAttribute(string sourcePath)
{
Binding = new Binding(sourcePath, "DataContext");
}
public BindAttribute()
{
Binding = new Binding(null, "DataContext");
}
public BindAttribute(string sourcePath)
{
Binding = new Binding(sourcePath, "Value");
}
public BindAttribute()
{
Binding = new Binding(null, "Value");
}
public Element(string caption, Binding binding): this(caption)
{
}
