我如何使用字符串作为索引来编译绑定或 x:Bind 到索引 属性？
How can I do compiled binding or x:Bind to indexed property using string as an index?
我正在尝试使用已编译的绑定 我有一个 属性 Errors，我曾经使用 {Binding Errors[PropertyName]} 等常规绑定进行绑定。但是，当我尝试使用 {x:Bind VM.Errors[PropertyName]} 时，出现了这个错误
"Invalid binding path 'VM.Errors[PropertyName]' : Expected a digit"
我也尝试使用像 VM.Errors['PropertyName'] 这样的引号，但它并没有解决问题。
它不起作用。微软写道：
{Binding Groups[2].Title}
Binds to the specified item in the collection. Only integer-based indexes are supported.
请参阅：https://msdn.microsoft.com/en-us/library/windows/apps/mt210946.aspx 页末。我曾尝试实施 IReadOnlyDictionary oe IDictionary，但没有成功。
这很有趣，因为在 https://msdn.microsoft.com/en-us/library/windows/apps/mt185586.aspx 他们说：
For example, consider a business object where there is a list of "Teams" (ordered list), each of which has a dictionary of "Players" where each player is keyed by last name. An example property path to a specific player on the second team is: "Teams1.Players[Smith]". (You use 1 to indicate the second item in "Teams" because the list is zero-indexed.)
更新
我在 Microsoft connnect 的支持案例已关闭。他们写道：
Thank you for reporting this issue as well as providing a sample project. The suggested scenario was not supported in Windows 10 RTM. We are however considering adding such support to a future update to Windows 10.
我正在尝试使用已编译的绑定 我有一个 属性 Errors，我曾经使用 {Binding Errors[PropertyName]} 等常规绑定进行绑定。但是，当我尝试使用 {x:Bind VM.Errors[PropertyName]} 时，出现了这个错误
"Invalid binding path 'VM.Errors[PropertyName]' : Expected a digit"
我也尝试使用像 VM.Errors['PropertyName'] 这样的引号，但它并没有解决问题。
它不起作用。微软写道：
{Binding Groups[2].Title}
Binds to the specified item in the collection. Only integer-based indexes are supported.
请参阅：https://msdn.microsoft.com/en-us/library/windows/apps/mt210946.aspx 页末。我曾尝试实施 IReadOnlyDictionary oe IDictionary，但没有成功。
这很有趣，因为在 https://msdn.microsoft.com/en-us/library/windows/apps/mt185586.aspx 他们说：
For example, consider a business object where there is a list of "Teams" (ordered list), each of which has a dictionary of "Players" where each player is keyed by last name. An example property path to a specific player on the second team is: "Teams1.Players[Smith]". (You use 1 to indicate the second item in "Teams" because the list is zero-indexed.)
更新
我在 Microsoft connnect 的支持案例已关闭。他们写道：
Thank you for reporting this issue as well as providing a sample project. The suggested scenario was not supported in Windows 10 RTM. We are however considering adding such support to a future update to Windows 10.