如何在WPF MarkupExtension中向params数组传递多个参数？

Question

我需要为我的WPF应用程序创建一个MarkupExtension，它需要能够接受任意数量的参数，并用于国际化字符串中的令牌替换。我们的国际化代码使用params数组来获取这些参数。由于我希望这些参数可以从XAML传递，是否有一种方法可以在XAML中指定这些参数，而不必显式创建x:Array？

- Brent Schooley

Answer 1

我认为你需要使用x:Array，我不知道其他的方法（也想不出其他能兼容标记扩展{}语法的方法）。

- Nir

---

你是正确的。我研究了很长时间，得出了相同的答案。 - Brent Schooley

Answer 2

有时候虽然不太美观，但是蛮力可以解决问题...

来自源代码：

[MarkupExtensionReturnType(typeof(PriorityBinding))]
public sealed class Priority:MarkupExtension {

readonly BindingBase[] bindings;

#region Constructors
public Priority(BindingBase b1) {
  bindings = new [] {b1};
}

public Priority(BindingBase b1, BindingBase b2) {
  bindings = new [] {b1, b2};
}

public Priority(BindingBase b1, BindingBase b2, BindingBase b3) {
  bindings = new [] {b1, b2, b3};
}

public Priority(BindingBase b1, BindingBase b2, BindingBase b3, 
                 BindingBase b4) {
  bindings = new [] {b1, b2, b3, b4};
}

public Priority(BindingBase b1, BindingBase b2, BindingBase b3,
                 BindingBase b4, BindingBase b5) {
  bindings = new [] {b1, b2, b3, b4, b5};
}

public Priority(BindingBase b1, BindingBase b2, BindingBase b3,
                 BindingBase b4, BindingBase b5, BindingBase b6) {
  bindings = new [] {b1, b2, b3, b4, b5, b6};
}

public Priority(BindingBase b1, BindingBase b2, BindingBase b3,
                 BindingBase b4, BindingBase b5, BindingBase b6, BindingBase b7) {
  bindings = new [] {b1, b2, b3, b4, b5, b6, b7};
}

public Priority(BindingBase b1, BindingBase b2, BindingBase b3,
                 BindingBase b4, BindingBase b5, BindingBase b6, BindingBase b7, BindingBase b8) {
  bindings = new [] {b1, b2, b3, b4, b5, b6, b7, b8};
}

#endregion

public override object ProvideValue(IServiceProvider serviceProvider) {
  var binding = new PriorityBinding();
  foreach (var item in bindings) {
    binding.Bindings.Add(item);
  }
  return binding;
}

}

- John Melville