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PODifficulty sorting Linq expression with jqGrid
 

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  1. PODifficulty sorting Linq expression with jqGrid
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    <p>I have seen this code <a href="https://stackoverflow.com/questions/4078592/sortable-jqgrid-using-linq-to-mysql-dblinq-and-dynamic-linq-orderby-doesnt-w">Sortable JqGrid using LINQ to MySQL (DbLinq) and Dynamic LINQ - Orderby doesn&#39;t work</a> and trying to make it work. But it's giving error:</p> <blockquote> <p>Cannot order by type 'System.Object'</p> </blockquote> <p>See the line in the code with Error Here.</p> <pre><code>[HttpPost] public ActionResult MyGridData(string sidx, string sord, int page, int rows) { IQueryable&lt;Company&gt; repository = companyRepository.GetGridCompanies(); int pageIndex = Convert.ToInt32(page) - 1; int pageSize = rows; int totalRecords = repository.Count(); int totalPages = (int)Math.Ceiling((float)totalRecords / (float)pageSize); // first sorting the data as IQueryable&lt;Ticket&gt; without converting ToList() IQueryable&lt;Company&gt; orderdData = repository; PropertyInfo propertyInfo = typeof(Company).GetProperty(sidx); if (propertyInfo != null) { orderdData = String.Compare(sord, "desc", StringComparison.Ordinal) == 0 ? (from x in repository orderby propertyInfo.GetValue(x, null) descending select x) : (from x in repository orderby propertyInfo.GetValue(x, null) select x); } // paging of the results IQueryable&lt;Company&gt; pagedData = orderdData .Skip((page &gt; 0 ? page - 1 : 0) * rows) .Take(rows); var jsonData = new { total = totalPages, page, records = totalRecords, rows = ( from o in pagedData //ERROR HERE : Cannot order by type 'System.Object' select new { i = o.companyID, cell = new string[] { o.companyID.ToString(), o.companyName, o.companyCity, o.companyState } }).ToArray() }; return Json(jsonData); } public class CompanyRepository { SandGridDataContext db = new SandGridDataContext(); // Send Total Number of Companies public int CompanyCount() { return db.Companies.Count(); } public IQueryable&lt;Company&gt; GetGridCompanies() { return db.Companies; } public Company GetCompany(int id) { return db.Companies.SingleOrDefault(d =&gt; d.companyID == id); } } </code></pre> <p><strong>//JS code</strong></p> <pre><code>jQuery().ready(function () { var lastSel; jQuery("#sandgrid").jqGrid({ url: '/JQSandbox/MyGridData/', datatype: 'json', mtype: 'POST', height: 255, width: 640, colNames: ['Index', 'Name', 'City', 'State'], colModel: [ { name: 'companyID', index: 'companyID', width: 5 }, { name: 'companyName', index: 'companyName', width: 30 }, { name: 'companyCity', index: 'companyCity', width: 30 }, { name: 'companyState', index: 'companyState', width: 4, sortable: false}], pager: jQuery('#sandgridp'), rowNum: 5, rowList: [5, 10, 20, 50], sortname: 'companyID', sortorder: "desc", viewrecords: true, altRows: true, caption: 'Sandbox Grid', ondblClickRow: function (id) { if (id &amp;&amp; id !== lastSel) { jQuery('#sandgrid').restoreRow(lastSel); lastSel = id; alert("You've seleted " + id); } }, subGrid: true, subGridUrl: '/JQSandbox/MySubGridData/', subGridModel: [ { name: ['Name', 'Department', 'Hire Date', 'Supervisor'], width: [80, 20, 80, 10], align: ['left', 'left', 'left', 'center'], params: ['companyID'] }] }).navGrid('#sandgridp', { edit: false, add: false, del: false }); </code></pre> <p><strong>//Company class is Linq to Sql entity with fields below.</strong></p> <pre><code>companyID, companyName, companyCity, companyState </code></pre>
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    1. UShalfer
    1. USPirzada
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    1. PL
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    1. COCould you include the definition of the class `Company` whith which you have problem.
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      1. USOleg
    2. COadded more information about js and Company class.
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      1. USPirzada
    3. COWhat you added is **NOT** a class definition. Important is whether you use **properties** or **fields** for `companyID`, `companyName` and so on. If you use properties `public class Company { public int companyID { get; set; } public string companyName { get; set; } ...}` then you should use `typeof(Company).GetProperty(sidx)` in your code. If you use fields instead like `public class Company { public int companyID; public string companyName; ...}` then you should use `typeof(Company).GetField(sidx)`. My question was **how** you defined the `Company` class.
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      1. PODifficulty sorting Linq expression with jqGrid
      1. USOleg
 

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