将查询转换为Lambda表达式

Question

在mysql中，

select distinct(trim(containerType)) from productIn where containerType <> '' group by containerNo

如何使用Lambda创建表达式查询？

例）

List<string> containerTypes = new List<string>();
containerTypes = productInRepository.GroupBy(x=> x.containerNo).Select(?????).ToList();

Answer 1

List<string> containerTypes = productInRepository
    .Where(x => x.containerType != string.Empty)
    .GroupBy(x=> x.containerNo)
    .Select(x => x.containerType.Trim())
    .ToList();

Answer 2

我认为不在结果选择中的groupby字段意味着与该字段的顺序相同。

List<string> containerTypes = productInRepository
                .Where(x => x.containerType != string.Empty)
                .OrderBy(x => x.containerNo)
                .Select(x => x.containerType.Trim())
                .Distinct();