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POInt.Parse in Linq Expression
 

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    <p>I have following linq expression. I want calculate sum of numeric values in Nvarchar field. I use following code to do this. But I get an error when I try to run this.</p> <pre><code> var m = new MaterialModelContainer(); var list = (from x in ( from inv in m.INVs join l in m.LIBs on inv.MESC equals l.MESC join o in m.OUTs on inv.MESC equals o.MESC join t in m.TRANs on inv.MESC equals t.MESC where t.TYPE == "60" select new { l.MESC, l.LINE_NO, l.UNIT_LINE, Description = l.DES + " " + l.PART_NO, inv.NEW_QTY, o.PJ, o.DATE, o.QTY, o.QTY_REC, TranQty = t.QTY, tranDate = t.DATE } ) group x by new { x.MESC, x.LINE_NO, x.UNIT_LINE, x.Description, x.NEW_QTY, x.PJ, x.DATE, x.QTY, x.QTY_REC } into g select new { QTY_Consum_1 = g.Where(c =&gt; int.Parse(c.tranDate) &gt;= cuDate &amp;&amp; int.Parse(c.tranDate) &lt;= endDate).Sum(d =&gt; int.Parse(d.TranQty)) } ).ToList(); </code></pre> <p><strong>Error Description:</strong><br></p> <blockquote> <p>LINQ to Entities does not recognize the method 'Int32 Parse(System.String)' method, and this method cannot be translated into a store expression <br></p> </blockquote> <p>How can i solve this problem and write this code better than this?</p> <p>i change code to this</p> <pre><code> select new { QTY_Consum_1 = g.Where(c =&gt; SqlFunctions.StringConvert(c.tranDate) &gt;= cuDate &amp;&amp; SqlFunctions.StringConvert(c.tranDate) &lt;= endDate).Sum(d =&gt; SqlFunctions.StringConvert(d.TranQty)), g.Key.MESC } ).ToList(); </code></pre> <p>but get this error <img src="https://i.stack.imgur.com/hJQjN.jpg" alt="enter image description here"></p>
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    1. COPerhaps this answer will help you: [Convert string to int in EF 4.0](http://stackoverflow.com/questions/5754218/convert-string-to-int-in-ef-4-0)
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