如何将索引属性绑定到 WPF 中的控件 [英] How can you bind an Indexed property to a control in WPF

问题描述

给定类 ThisClassShouldBeTheDataContext 的实例作为视图的 Datacontext

Given an instance of the class ThisClassShouldBeTheDataContext as the Datacontext for the view

class ThisClassShouldBeTheDataContext
{
  public Contacts Contacts {get;set;}
}

class Contacts
{
  public IEnumerable<Person> Persons {get;set;}
  public Person this[string Name]
  {
    get 
    {
      var p = from i in Persons where i.Name = Name select i;
      return p.First();
    }    
  }
}

class Person
{
  public string Name {get;set;}
  public string PhoneNumber {get;set;}
}

如何将 Contact["John"].PhoneNumber 绑定到文本框?

How can I bind Contact["John"].PhoneNumber to a textbox?

<TextBox Text="{Binding ?????}" />

推荐答案

索引器符号与 C# 基本相同:

The indexer notation is basically the same as C#:

<TextBox Text="{Binding Contacts[John].PhoneNumber}" />

请参阅 绑定声明概述 > 绑定路径MSDN 中的语法了解更多信息.

See Binding Declarations Overview > Binding Path Syntax in MSDN for more info.

这当然不适用于任意数据类型...

This won't, of course, work for arbitrary data types...

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