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POGeneric LINQ query predicate?
 

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    <p>Not sure if this is possible or if I'm expressing correctly what I'm looking for, but I have the following piece of code in my library repeatedly and would like to practice some DRY. I have set of SQL Server tables that I'm querying based on a simple user-supplied search field ala Google. I'm using LINQ to compose the final query based on what's in the search string. I'm looking for a way to use generics and passed in lambda functions to create a reusable routine out of this: </p> <pre><code>string[] arrayOfQueryTerms = getsTheArray(); var somequery = from q in dataContext.MyTable select q; if (arrayOfQueryTerms.Length == 1) { somequery = somequery.Where&lt;MyTableEntity&gt;( e =&gt; e.FieldName.StartsWith(arrayOfQueryTerms[0])); } else { foreach(string queryTerm in arrayOfQueryTerms) { if (!String.IsNullOrEmpty(queryTerm)) { somequery = somequery .Where&lt;MyTableEntity&gt;( e =&gt; e.FieldName.Contains(queryTerm)); } } } </code></pre> <p>I was hoping to create a generic method with signature that looks something like:</p> <pre><code>private IQueryable&lt;T&gt; getQuery( T MyTableEntity, string[] arrayOfQueryTerms, Func&lt;T, bool&gt; predicate) </code></pre> <p>I'm using the same search strategy across all my tables, so the only thing that really differs from usage to usage is the MyTable &amp; MyTableEntity searched and the FieldName searched. Does this make sense? Is there a way with LINQ to dynamically pass in the name of the field to query in the where clause? Or can I pass in this as a predicate lambda?</p> <pre><code>e =&gt; e.FieldName.Contains(queryTerm) </code></pre> <p>I realize there a million and a half ways to do this in SQL, probably easier, but I'd love to keep everything in the LINQ family for this one. Also, I feel that generics should be handy for a problem like this. Any ideas?</p>
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    1. COSame question but for Select clause: http://stackoverflow.com/questions/10376947/how-can-i-construct-and-save-to-a-db-for-later-use-a-semi-arbitrary-lambda-expre
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