asp.net - 查询中的 Linq 子查询

Question

我有两个列表，我必须从中获取两个值(MyCaption 和 MyValue)。

List<UserInfoModel> userInfo = new List<UserInfoModel>();

List<myuser_field> myUserFields = GetMyUserFields();
var otherUserFields = otherUserService.GetOtherUserFields();

userInfo = (from otherUserField in otherUserFields
               where otherUserField.Chosen == true 
                    select new UserInfoModel {
                        MyCaption = otherUserField.FieldAlias,
                        MyValue =
                    }).ToList();

MyCaption 我直接从列表之一获取。现在要获取 MyValue，我需要根据 otherUserField.FieldName 进行查找。 即我必须找到等于 otherUserField.FieldName 的 myUserFields.FieldName 并将其分配给 MyValue。

可以在上面的单个查询中完成吗？请推荐

Answer 1

userInfo = (from myUserField in myUserFields
            join otherUserField in otherUserFields
            on myUserField.FieldName == otherUserField.FieldName
            where otherUserField.Chosen == true 
            select new UserInfoModel {
                MyCaption = otherUserField.FieldAlias,
                MyValue = myUserField.FieldName
            }).ToList();