元素编号更改时绑定到列表元素

Question

        private List<Report> _reports = new List<Report>();
        public Report CurrentReport
        {
            get { return _reports[_componentIterator]; }
            set { _reports[_componentIterator] = value; }
        }

我有一个 _reports 字段，它是一个报表对象列表。

我使用 CurrentReport 属性访问基于 _componentIterator 的当前 Report 对象。

如何绑定到某些报表属性，以便更改 _componentIterator 不会破坏我的绑定？

如果我这样绑定，每个 _componentIterator 更改都会破坏绑定。

           Binding designatorTextBlockBinding = new Binding(nameof(CurrentReport.Designator));
            designatorTextBlockBinding.Source = CurrentReport;
            _artifactControl.DesignatorTextBlock.SetBinding(Controls.TextBlock.TextProperty, designatorTextBlockBinding);

Answer 1

如下所示声明绑定，并确保 CurrentReport 属性触发更改通知。

var designatorTextBlockBinding = new Binding
{
    Path = new PropertyPath("CurrentReport.Designator"),
    Source = this
};

或

var designatorTextBlockBinding = new Binding
{
    Path = new PropertyPath(
        nameof(CurrentReport) + "." + nameof(CurrentReport.Designator)),
    Source = this
};

或

var designatorTextBlockBinding = new Binding(
    nameof(CurrentReport) + "." + nameof(CurrentReport.Designator))
{
    Source = this
};

元素编号更改时绑定到列表元素

Binding to List element when element number changes

wpf

binding

list