如何在ObservableCollection< T>上执行foreach lambda表达式? [英] How do I execute a foreach lambda expression on ObservableCollection<T>?

问题描述

如何在ObservableCollection< T>上执行foreach lambda表达式?

How do I execute a foreach lambda expression on ObservableCollection<T>?

尽管ObservableCollection< T>中没有foreach方法，但是List< T>中存在该方法.

There is not method of foreach with ObservableCollection<T> although this method exists with List<T>.

有没有可用的扩展方法?

Is there any extension method available?

推荐答案

BCL默认没有可用的方法，但是直接编写具有相同行为的扩展方法(为简洁起见，省略了参数检查)

There is no method available by default in the BCL but it's straight forward to write an extension method which has the same behavior (argument checking omitted for brevity)

public static void ForEach<T>(this IEnumerable<T> enumerable, Action<T> action) {
  foreach ( var cur in enumerable ) {
    action(cur);
  }
}

用例

ObservableCollection<Student> col = ...;
col.ForEach(x => Console.WriteLine(x.Name));

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