c# - Binding grid to linq where date is stored as integer -

I want to pair a webdata or redridge into a LinuxSaath. Date is stored in DB as an integer such as 20070205 (iM.M.) when I select i .LASTRCPTDT.ToString ("MM / dd / yyyy") in iiLOCs in IICLOS, then the intersection of a date in the Linux query Try to change;

  var q =  

I get an error:

method 'System.String ToString (System.String ) 'Does not have any supported translations in SQL.

I can load the result with memory toList () and then parse it. The problem is that I will lose efficient paging with the grid. Or I can parse it on ItemDatabound, the problem is how do I set filters for this field in the grid? It should be a calendar dropdown, not an integer text box. Do you have any solutions for this?