LINQ 中有 3 个 where 子句

Question

我在 LINQ 中有 3 个 where 子句，但它失败了 - 我尝试过这个

List<string> companies = new List<string>() { "0001001429"};
List<string> roleIDs = new List<string>() { "1486334", "1419282"};


var q = (from up in UserReports
        where up.UserType == "Internal"     
        where companies.Contains(up.CompanyId) && roleIDs.Contains(up.RoleId)
                             select new 
                             {
                                 UserId = up.UserId,
                                 FirstName = up.FirstName,
                                 LastName = up.LastName, ...});

，我也尝试过有 2 个连接 -

var q = (from up in UserReports
                             join c in companies on up.CompanyID equals c
                             join r in rolesIDs on up.RoleId equals r
                             where up.UserType == "Internal"
                             select new 
                             {
                                 UserId = up.UserId,..});

我在这里做错了什么？

问候， 巴维克

Answer 1

试试这个。我用“and”更改了“where”

var q = (from up in UserReports
    where up.UserType == "Internal"     
    && companies.Contains(up.CompanyId) && roleIDs.Contains(up.RoleId)
                         select new 
                         {
                             UserId = up.UserId,
                             FirstName = up.FirstName,
                             LastName = up.LastName, ...});

，您需要指定公司和角色的ID：

var q = (from up in UserReports
                         join c in companies on up.CompanyID equals c.Id
                         join r in rolesIDs on up.RoleId equals r.Id
                         where up.UserType == "Internal"
                         select new 
                         {
                             UserId = up.UserId,..});