WPF-绑定到集合中的特定元素 [英] WPF - binding to a specific element in a collection

问题描述

亲爱的专家们；)

在我的WPF应用程序中，我有一个名为 Employee 的类，其中包含2个字段: FirstName ， LastName .
在我的视图模型中，我有两个可绑定的属性:

Hi dear experts ;)

In my WPF app, I have a class called Employee with 2 fields: FirstName, LastName.
In my view model, I have two bindable properties:

ObservableCollection<Employee> Employees;<br />
int CurrentIndex;

我想将我的视图上的TextBlock绑定到当前雇员的FirstName字段；我已经测试了这些语法，但不幸的是没有一个起作用::omg​​:

a)<TextBlock Text="{Binding Employees[CurrentIndex].FirstName}"/>
b)<TextBlock Text="{Binding Employees[{Binding CurrentIndex}].FirstName}"/>

你能给我解决办法吗?
我不确定，但我认为可以使用CollectionViewSource.但实际上我不想使用它:laugh:

提前谢谢大家，
干杯，
Siavash

I want to bind a TextBlock on my view to the FirstName field of current employee; I''ve tested these syntaxs, but unfortunately none worked: :omg:

a) <TextBlock Text="{Binding Employees[CurrentIndex].FirstName}"/>
b) <TextBlock Text="{Binding Employees[{Binding CurrentIndex}].FirstName}"/>

Can you give me any solution?
I''m not sure but I think it''s possible to use CollectionViewSource; but actually I prefer not to use it :laugh:

Thank you all in advance,
Cheers,
Siavash

推荐答案

将新属性添加到名为CurrentEmployee 的视图模型中会更加容易，该属性将返回Employees[CurrentIndex].

It would be far more easier to add a new property to your view-model called CurrentEmployee which returns Employees[CurrentIndex].

感谢Nishant :)
你说得对；
我不想为此保留额外的参考；但似乎是不可避免的.

干杯，
Siavash

Thanks Nishant :)
You''re right;
I didn''t want to maintain an extra reference for that; but it seems it''s unavoidable.

Cheers,
Siavash

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