有谁知道如何获取与绑定相关的当前值?我最近遇到了一个问题,我想在WPFToolKit DataGrid中获取与特定单元相关联的值 - 所以我创建了一个获取Path字符串的函数,拆分为'。'并尝试在循环中使用PropertyDescriptor,尝试获取绑定值。当然有更好的方式:)。如果有人能指出我正确的方向,我会永远爱你。
谢谢,
查尔斯
答案 0 :(得分:0)
由于答案的给定链接现在仅在webarchive上可用,我复制了那里给出的答案:
public static class DataBinder
{
private static readonly DependencyProperty DummyProperty = DependencyProperty.RegisterAttached(
"Dummy",
typeof(Object),
typeof(DependencyObject),
new UIPropertyMetadata(null));
public static object Eval(object container, string expression)
{
var binding = new Binding(expression) { Source = container };
return binding.Eval();
}
public static object Eval(this Binding binding, DependencyObject dependencyObject = null)
{
dependencyObject = dependencyObject ?? new DependencyObject();
BindingOperations.SetBinding(dependencyObject, DummyProperty, binding);
return dependencyObject.GetValue(DummyProperty);
}
}
示例:
public partial class PropertyPathParserDemo : Window
{
public PropertyPathParserDemo()
{
InitializeComponent();
Foo foo = new Foo() { Bar = new Bar() { Value = "Value" } };
this.Content = DataBinder.Eval(foo, "Bar.Value");
}
public class Foo
{
public Bar Bar
{
get;
set;
}
}
public class Bar
{
public string Value
{
get;
set;
}
}
}