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POC# Lambda Entity Framework: Any way to use a predicate Lambda to choose records by row number?
 

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  1. POC# Lambda Entity Framework: Any way to use a predicate Lambda to choose records by row number?
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    <p>I want to do paging outside of my Repository, but the Repository returns IList. Since I don't want to pull data unnecessarily, and don't want to create specific Paging methods in my Repositories, <strong>Is there any way to filter records by page in the Where extension method?</strong></p> <p>I want to do something like:</p> <pre><code>var myRecords = ProductRepo.Get( p =&gt; p.Name.StartsWith("Pepsi") &amp;&amp; p.Row_Number() &gt; 9 &amp;&amp; p.Row_Number() &lt; 21); </code></pre> <p>The Get repository code (doesn't handle row number of course):</p> <pre><code>public IList&lt;Product&gt; Get( Expression&lt;Func&lt;Product, bool&gt;&gt; filter = null) { if( filter == null) return _dc.Products.ToList&lt;Product&gt;(); else return _dc.Products.Where(filter).ToList&lt;Product&gt;(); } </code></pre>
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    1. USZachary Scott
    1. USZachary Scott
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    1. COCould you provide the implementation of `ProductRepo.Get`?
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      1. POC# Lambda Entity Framework: Any way to use a predicate Lambda to choose records by row number?
      1. USPieter van Ginkel
    2. COApparently this can only be done with not returning a Collection type from the repository, or doing the Skip and Take within the repository. I wonder why you couldn't create a field within the SQL that represented ROW_NUMBER OVER (ORDER BY ). I will keep looking.
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      1. USZachary Scott
 

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