c# - 从 BindingList 中删除重复项

Question

BindingList有没有去除重复元素的方案？我试过:

 BindingList<Account> accounts = new BindingList<Account>();

 accounts.add(new Account("username", "password"));
 accounts.add(new Account("username", "password"));

 accounts = accounts.Distinct();

上面的代码不起作用，因为 Distinct 正在返回 System.Collections.Generic.IEnumerable<T>而不是 BindingList<T>

Answer 1

BindingList有一个构造函数，它接受 IList<T>你可以转换一个Enumerable<T> to a List .

BindingList<Account> distinctAccounts = new BindingList<Account>(accounts.Distinct().ToList());

作为King King指出Distinct()使用默认的相等比较器

The default equality comparer, Default, is used to compare values of the types that implement the IEquatable generic interface. To compare a custom data type, you need to implement this interface and provide your own GetHashCode and Equals methods for the type.