Linq to SQL 添加了一个 Lambda .Join getting AnonymousType#1' does not contain a definition and no extension method

Question

加入 Lambda 时加入。加入我的 linq lambda 出现问题 .Where(..

 .Where(z => z.Inact_ind == "N" && z.Wwid != null)

很好，直到我在上面添加 .Join。

例如

.Join(Rpm_scrty_emp_info, z => z.Wwid, ei => ei.Wwid, (z, ei) => new{z,ei})

linq 查询

(Linqpad , 所以 Rpm_scrty_rpm_usrs 本质上与 dbcontext dbset 相同)

var queryAllUsers = Rpm_scrty_rpm_usrs
            .Join(Rpm_scrty_emp_info, z => z.Wwid, ei => ei.Wwid, (z, ei) => new{z,ei})
            .Where(z => z.Inact_ind == "N" && z.Wwid != null)
            .AsEnumerable()
            .Select(z => new rpm_scrty_rpm_usr()
            {
                usr_id = z.Usr_id,
                usr_lnm = z.Usr_lnm,
                usr_pwd = z.Usr_pwd,
                usr_fnm = z.Usr_fnm,
                wwid = z.Wwid,
                apprvr_wwid = z.Apprvr_wwid,
                chg_dtm = z.Chg_dtm,
                chg_usr_id = z.Chg_usr_id,
                dflt_ste_id = z.Dflt_ste_id,
                cre_dtm = z.Cre_dtm,
                cre_usr_id = z.Cre_usr_id,
                lst_pwd_chg_dtm = z.Lst_pwd_chg_dtm,
                lst_accs_dtm = z.Lst_accs_dtm,
                email_id = z.Email_id,
                inact_ind = z.Inact_ind,
                salt = z.Salt,
                tel = z.Tel                 

                //});
            })
            .ToList();

波科class

public class rpm_scrty_rpm_usr
{

    public string usr_id { get; set; }

    public string usr_fnm { get; set; }
    public string usr_lnm { get; set; }
    public string usr_pwd { get; set; }
    public string email_id { get; set; }
    public string wwid { get; set; }
    public string tel { get; set; }
    public int dflt_ste_id { get; set; }
    public DateTime? lst_pwd_chg_dtm { get; set; }
    public DateTime? lst_accs_dtm { get; set; }
    public string apprvr_wwid { get; set; }
    public string inact_ind { get; set; }
    public string cre_usr_id { get; set; }
    public DateTime? cre_dtm { get; set; }
    public string chg_usr_id { get; set; }
    public DateTime? chg_dtm { get; set; }
    public string salt { get; set; }


}

Answer 1

当你return:

.Join(Rpm_scrty_emp_info, z => z.Wwid, ei => ei.Wwid, (z, ei) => new{z,ei})

您实质上是在为您尝试加入的每个数据源创建一个新的匿名类型，该类型具有属性。我怀疑您只是想 return z 对象。尝试：

.Join(Rpm_scrty_emp_info, z => z.Wwid, ei => ei.Wwid, (z, ei) => z)

returned 对象应该是类型 z，这意味着您可以在 .Where() 子句中访问它的属性（因为它是强类型的）。

Answer 2

联接后，联接查询中的每个条目都有两个 rpm_scrty_rpm_usr，一个名为 z，另一个名为 ei。

你需要明确where语句：你要过滤哪一个，例如：

.Where(z => z.z.Inact_ind == "N" && z.z.Wwid != null)

Linq to SQL 添加了一个 Lambda .Join getting AnonymousType#1' does not contain a definition and no extension method

Linq to SQL added a Lambda .Join geting AnonymousType#1' does not contain a definition and no extension method

c#

linq

lambda

entity-framework

linq-to-sql