internal BindingExpression(Binding binding, DependencyObject target, DependencyProperty property)
{
ParentBinding = binding;
Target = target;
Property = property;
//setting _isDataContextBound to true if none of the following elements are set in the parentBinding: ElementName, Source and RelativeSource :
_isDataContextBound = binding.ElementName == null && binding.Source == null && binding.RelativeSource == null;
//we change the Binding so that when it is bound to the DataContext, we handle it the same way as
if (_isDataContextBound)
{
ParentBinding.INTERNAL_ComputedSource = target;
string str = ParentBinding.Path.Path;
if (!String.IsNullOrWhiteSpace(str) && !((str = str.Trim()) == "."))
{
ParentBinding.INTERNAL_ComputedPath = new PropertyPath("DataContext." + str);
}
else
{
ParentBinding.INTERNAL_ComputedPath = new PropertyPath("DataContext");
}
_isDataContextBound = false; //test to see if the problems with the DataContext are still there or not.
}
string path = (binding.INTERNAL_ComputedPath != null ? binding.INTERNAL_ComputedPath.Path : null);
var walker = PropertyPathWalker = new PropertyPathWalker(path, _isDataContextBound);
if (binding.Mode != BindingMode.OneTime)
{
walker.Listen(this);
}
}
internal BindingExpression(Binding binding, DependencyProperty property)
{
ParentBinding = binding;
TargetProperty = property;
if (binding.ElementName == null && binding.Source == null && binding.RelativeSource == null) //this means that it is bound to current DataContext.
{
this.isDataContextBound = true;
//we change the Binding so that when it is bound to the DataContext, we handle it the same way as
string str = ParentBinding.Path.Path;
if (!string.IsNullOrWhiteSpace(str) && !((str = str.Trim()) == "."))
{
this.computedPath = "DataContext." + str;
}
else
{
this.computedPath = "DataContext";
}
}
else
{
this.computedPath = this.ParentBinding.Path != null ? this.ParentBinding.Path.Path : string.Empty;
}
//string path = (binding.INTERNAL_ComputedPath != null ? binding.INTERNAL_ComputedPath.Path : null);
var walker = propertyPathWalker = new PropertyPathWalker(this.computedPath, false);
if (binding.Mode != BindingMode.OneTime)
{
walker.Listen(this);
}
}
internal BindingExpression(Binding binding, DependencyProperty property)
{
ParentBinding = binding;
TargetProperty = property;
bool isDataContextBound = binding.ElementName == null && binding.Source == null && binding.RelativeSource == null;
string path = ParentBinding.XamlPath ?? ParentBinding.Path.Path ?? string.Empty;
var walker = _propertyPathWalker = new PropertyPathWalker(path, isDataContextBound);
if (binding.Mode != BindingMode.OneTime)
{
walker.Listen(this);
}
}
private void UpdateDataType()
{
if (this.Column != null && this.Column.DataType == typeOfObject)
{
using (PropertyPathWalker propertyPathWalker = new PropertyPathWalker(this.Column.Binding.Path.Path, true))
{
propertyPathWalker.Update(this.DataContext);
if (!propertyPathWalker.IsPathBroken)
{
this.Column.DataType = propertyPathWalker.FinalNode.ValueType;
}
}
}
}