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POUse Linq to SQL to search only time portions of a date in SQL 2008
 

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    <p>I want to be able to search on a DateTime field not only by a date range, but also by a time range. For example, "Get me all records in the month of May created between 1pm and 3pm". The SQL I'm looking to generated is:</p> <pre><code>WHERE CreatedOn BETWEEN '05/01/2010' AND '06/01/2010' AND CONVERT(time(4), CreatedOn) BETWEEN '01:00 PM' AND '03:00 PM' </code></pre> <p>I can't seem to figure out how to get a lambda expression to get me there. Anybody got any clue? I've got System.Linq.Dynamic in my project. Similar to the way you can pass a string as an OrderBy clause, I thought I might be able to do the same with the Where method as follows::</p> <pre><code>results = results.Where("CONVERT(time(4), OccurredOn) BETWEEN '{0}' AND '{1}'", Criteria.OffenseTimeStart, Criteria.OffenseTimeEnd); </code></pre> <p>But that throws an exception in System.Linq.Dynamic. Anybody got any pointers?</p> <p>THANKS FOR THE HELP! Here is my working code excerpt. I exposed my time criteria properties as TimeSpans:</p> <pre><code> if (Criteria.OffenseDateStart.HasValue) results = results.Where(o =&gt; o.OccurredOn &gt;= Criteria.OffenseDateStart); if (Criteria.OffenseDateEnd.HasValue) results = results.Where(o =&gt; o.OccurredOn &lt;= Criteria.OffenseDateEnd); if (Criteria.OffenseTimeStart.HasValue) results = results.Where(o =&gt; o.OccurredOn.TimeOfDay &gt;= Criteria.OffenseTimeStart); if (Criteria.OffenseTimeEnd.HasValue) results = results.Where(o =&gt; o.OccurredOn.TimeOfDay &lt;= Criteria.OffenseTimeEnd); </code></pre>
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