我有一些使用linq查询的方法。接下来是逻辑,如果我为角色 ID 列表传递 null,我希望所有角色都包含在进程中,但如果它有价值,我只想要列表中有 id 的角色。我正在接受驱逐。
public static List<NameEmail> GetNameEmailPairs(Guid guid, List<int> recipientRoles)
{
using (var tc = TransactionContext())
{
var dc = tc.DataContext;
var nameEmailPairs = (
from email in dc.Emails
join logon in dc.Logons on email.GUID equals logon.GUID
join eLogon in dc.ELogons on logon.UID equals eLogon.LogonGUID
join role in dc.Roles on entityLogon.PrimaryPermissionRoleID equals role.RoleID
where
(recipientRoles == null || recipientRoles.Contains(role.RoleID))
select new NameEmail
{
Email = email.EmailAddress,
FullName = GetName(logon.GUID)
}
)
.ToList();
return nameEmailPairs;
}
}
这部分正在中断 (收件人角色 == 空 || 收件人角色.包含(角色.角色 ID))。你能帮我这个吗,我该怎么办?
为了简化调试,请将查询分解为如下所示的部分:
var nameEmailPairs = (
from email in dc.Emails
join logon in dc.Logons on email.GUID equals logon.GUID
join eLogon in dc.ELogons on logon.UID equals eLogon.LogonGUID
join role in dc.Roles on entityLogon.PrimaryPermissionRoleID equals role.RoleID
select new {email, role}
);
if(recipientRoles != null)
{
nameEmailPairs = nameEmailPairse.Where(
recipientRoles.Contains(p => p.role.RoleID)
);
}
var nameEmailPairs = (from p in nameEmailPairs
select new NameEmail
{
Email = email.EmailAddress,
FullName = GetName(logon.GUID)
}).ToList();