Question

带有列表：

“ A”，“ Bb”，“ C”，“ a”，“ d”，“ bb”

如何在不使用大小写的情况下使用LinQ删除重复项？

此处的输出应为：

“ C”，“ d”

Answer 1

尝试

  var result = testList
               .GroupBy(item => item, StringComparer.OrdinalIgnoreCase)
               .Where(g => g.Count() == 1)
               .Select(g => g.Key)
               .ToList();

Answer 2

Use可以将GroupBy方法与IgnoreCase字符串比较器之一一起使用，然后仅选择由单个元素组成的那些组

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Answer 3

您可以将GroupBy（）与StringComparer.CurrentCultureIgnoreCase选项一起使用，如下所示：

List<String> data = new List<String>() { "A", "Bb", "C", "a", "d", "bb" };
List<String> newData = data.GroupBy(x => x, StringComparer.CurrentCultureIgnoreCase)
    .Where(el => el.Count() == 1)
    .Select(el => el.Key)
    .ToList();

使用C＃/ LinQ删除列表中的重复字符串，但忽略大小写

3 个答案: