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POLinq to SQL question - specifying columns then modifying column
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  1. POLinq to SQL question - specifying columns then modifying column
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    copied!<p>I'm trying to write a linq to sql method that handles sorting, paging, and filtering for an ajax grid. I created a partial class Employee that has a TotalRecordCount, as I need to pass this to the javascript for setting up the pager. The problem is that it won't build because I can't set the AnonymousType#1.TotalRecordCount, it's read-only. Yet if I do "select new Employee", then it will throw the Exception - "Explicit construction of entity type 'InVision.Data.Employee' in query is not allowed.".</p> <p>Here's the code...</p> <pre><code>public string GetPageJSON(string sortColumn, string sortDirection, int pageNumber, int pageSize, EmployeeSearch search) { var query = from e in db.Employees select new { EmployeeID = e.EmployeeID, FirstName = e.FirstName, LastName = e.LastName, LoginName = e.LoginName, IsLockedOut = e.IsLockedOut, TotalRecordCount = e.TotalRecordCount }; //searching. if (search.FirstName.Length &gt; 0) query = query.Where(e =&gt; e.FirstName.Contains(search.FirstName)); if (search.LastName.Length &gt; 0) query = query.Where(e =&gt; e.LastName.Contains(search.LastName)); if (search.LoginName.Length &gt; 0) query = query.Where(e =&gt; e.LoginName.Contains(search.LoginName)); if (search.Status.Length &gt; 0) query = query.Where(e =&gt; (search.Status == "Active" &amp;&amp; !e.IsLockedOut) || (search.Status == "Inactive" &amp;&amp; e.IsLockedOut)); //sorting. query = query.OrderBy(sortColumn, sortDirection); //get total record count. int totalRecordCount = query.Count(); //paging. query = query.Skip((pageNumber - 1) * pageSize).Take(pageSize); //set total record count. var list = query.ToList(); if (list.Count &gt; 0) { list[0].TotalRecordCount = totalRecordCount; //throws exception } //return json. JavaScriptSerializer serializer = new JavaScriptSerializer(); return serializer.Serialize(list); } </code></pre>
 

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