如何计算linq中的列值到sql查询的总和？

Question

我写此查询：

var query2 = (from p in behzad.Compare_closed_numbers_in_CRM_and_Billing_system_detail_counters 
       where p.fileid == point.id 
       select new 
       { 
        p.count 
       }).ToArray(); 

在数列中有任何价值，我要总结所有的计数值。例如：

我该如何植入？谢谢。

Answer 1

如果计数字段INT试试这个：

int sum = behzad.Compare_closed_numbers_in_CRM_and_Billing_system_detail_counters 
    .Where(t=>t.fileid == point.id) 
    .Select(t => t.Count ?? 0).Sum(); 

如果计数字段是nvarchar(max)试试这个：

int sum = behzad.Compare_closed_numbers_in_CRM_and_Billing_system_detail_counters 
     .Where(t=>t.fileid == point.id) 
     .Select(t => Convert.ToInt32(t.Count)).Sum();