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    <p>You could create your own date range method</p> <pre><code>public static class EnumerableEx { public static IEnumerable&lt;DateTime&gt; DateRange(DateTime startDate, DateTime endDate, TimeSpan intervall) { for (DateTime d = startDate; d &lt;= endDate; d += intervall) { yield return d; } } } </code></pre> <p>Then query with</p> <pre><code>var query = from recurrence in Recurrences from date in EnumerableEx.DateRange(recurrence.StartDate, recurrence.EndDate ?? end, recurrence.RecurrenceInterval) select new ScheduledEvent { Date = date }; </code></pre> <p>This assumes that <code>RecurrenceInterval</code> is declared as <code>TimeSpan</code> and <code>end</code> as <code>DateTime</code>.</p> <hr> <p>EDIT: Would this version restrict the recurrences on the server side as you excpect?</p> <pre><code>var query = from recurrence in Recurrences where recurrence.StartDate &lt;= end &amp;&amp; (recurrence.EndDate != null &amp;&amp; recurrence.EndDate.Value &gt;= start || recurrence.EndDate == null) from date in EnumerableEx.DateRange( recurrence.StartDate, recurrence.EndDate.HasValue &amp;&amp; recurrence.EndDate.Value &lt; end ? recurrence.EndDate.Value : end, recurrence.RecurrenceInterval) where (date &gt;= start) select new ScheduledEvent { Date = date }; </code></pre> <p>Here the returned recurrences already take in account the <code>start</code> and the <code>end</code> date, thus not returning obsolete recurrences. <code>EnumerableEx.DateRange</code> has no effect on the first part of the query.</p>
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    1. POGet a range of dates given an interval and step
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    1. USOlivier Jacot-Descombes
    1. USOlivier Jacot-Descombes
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    1. COI added a version which should be transformed by the query provider as it uses only normal comparisons in the where clause and uses no date range enumeration here.
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      1. USOlivier Jacot-Descombes
    2. COI see what you're saying. Once we limit the range, selecting client side should be trivial. Like I said, it works for intervals greater than a day. Most of the time the window will be for a week as well. Following YAGNI, we'll revisit the algorithm if performance becomes a problem.
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      1. USMichael Brown
    3. COA query to EF will eventually be transformed to an SQL statement. You cannot expect more of this SQL statement than containing an appropriate WHERE clause. Every supplemental logic has to be performed on the returned records (mapped to `Recurrence`). The only thing the (db) server can do, is to execute a query.
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      1. USOlivier Jacot-Descombes
 

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