I am converting some VB.Net code over to C# and I am stuck on this linq query:
(From query In dtx.WebQueries Join _
wt In dtx.WebTasks On wt.TaskReportCategory Equals query.QueryCategory _
Where wt.TaskKey = taskKey _
//In the legacy code they reuse thekey below
Select query, thekey = query.QueryKey Order By query.QueryTitle _
Where Not (From qry In dtx.WebQueries Join _
qg In dtx.WebQueryGroups On qry.QueryKey Equals qg.QueryKey Join _
wp In dtx.WebPermissions On qg.QueryGroupNameKey Equals wp.TaskGroupNameKey Join _
wugn In dtx.WebUserGroupNames On wp.UserGroupNameKey Equals wugn.UserGroupNameKey Join _
wug In dtx.WebUserGroups On wugn.UserGroupNameKey Equals wug.UserGroupNameKey Join _
wt In dtx.WebTasks On wt.TaskReportCategory Equals qry.QueryCategory _
Where wp.ResourceKey = 4 _
And wt.TaskKey = taskKey _
And wug.UserKey = userKey _
//Here they reuse thekey and I am not sure how to assign it
Select qry.QueryKey).Contains(thekey))
I have converted all but one small piece of code:
(from query in dtx.WebQueries join
wt in dtx.WebTasks on query.QueryCategory equals wt.TaskReportCategory
where wt.TaskKey == taskKey
//I am not sure how to assign a variable here to use later
select new { query, var key = query.QueryKey}).OrderBy(x => x.QueryTitle)
.Where(!from qry in dtx.WebQueries join
qg in dtx.WebQueryGroups on qry.QueryKey equals qg.QueryKey join
wp in dtx.WebPermissions on qg.QueryGroupNameKey equals wp.TaskGroupNameKey join
wugn in dtx.WebUserGroupNames on wp.UserGroupNameKey equals wugn.UserGroupNameKey join
wug in dtx.WebUserGroups on wugn.UserGroupNameKey equals wug.UserGroupNameKey join
wt in dtx.WebTasks on qry.QueryCategory equals wt.TaskReportCategory
where wp.ResourceKey == 4
&& wt.TaskKey == taskKey
&& wug.UserKey == userKey
select qry.QueryKey) == key //I need to put the variable here (see above comment);
I am not sure how to do the part where the comments are in C#.
If you need to assign a variable you can use the LINQ let clause . Something like
let key = query.QueryKey
that can later be used in the same scope. In your case, though, I would say that just removing the var keyword from the anonymous type should allow you to reference it later in your where clause. Something like:
select new { query, key = query.QueryKey}).OrderBy(x => x.query.QueryTitle)
.Where(q => !(from qry in dtx.WebQueries join
qg in dtx.WebQueryGroups on qry.QueryKey equals qg.QueryKey join
wp in dtx.WebPermissions on qg.QueryGroupNameKey equals wp.TaskGroupNameKey join
wugn in dtx.WebUserGroupNames on wp.UserGroupNameKey equals wugn.UserGroupNameKey join
wug in dtx.WebUserGroups on wugn.UserGroupNameKey equals wug.UserGroupNameKey join
wt in dtx.WebTasks on qry.QueryCategory equals wt.TaskReportCategory
where wp.ResourceKey == 4
&& wt.TaskKey == taskKey
&& wug.UserKey == userKey
select qry.QueryKey).Contains(q.key))
Try the following:
((from query in dtx.WebQueries
join wt in dtx.WebTasks on wt.TaskReportCategory equals query.QueryCategory
where wt.TaskKey == taskKey
select new {query, thekey = query.QueryKey}).OrderBy(query => query.QueryTitle)
where!(
from qry in dtx.WebQueries
join qg in dtx.WebQueryGroups on qry.QueryKey equals qg.QueryKey
join wp in dtx.WebPermissions on qg.QueryGroupNameKey equals wp.TaskGroupNameKey
join wugn in dtx.WebUserGroupNames on wp.UserGroupNameKey equals wugn.UserGroupNameKey
join wug in dtx.WebUserGroups on wugn.UserGroupNameKey equals wug.UserGroupNameKey
join wt in dtx.WebTasks on wt.TaskReportCategory equals qry.QueryCategory
where wp.ResourceKey == 4 && wt.TaskKey == taskKey && wug.UserKey == userKey
select qry.QueryKey).Contains(thekey));
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