Linq Count all items in a column

Question

How would I do a linq query like this For example I want to count up all the numbers in a column and for it to return the result of them being added up

Thanks

Answer 1

var count = mytable.Sum（t => t.myCol）;

Answer 2

I find the LINQ to SQL samples site on MSDN to be an excellent reference for basic questions like this.

The Simple Sum example there is probably what you want:

// This sample uses Sum to find the total freight over all Orders.
void LinqToSqlCount03()
{
    var q =  (from o In db.Orders 
             select o.Freight).Sum()
}

Answer 3

开始了：

 DbContextName = dbTableName.Count(x=>x.columnName);

Answer 4

请尝试以下方法：

numbers.Sum(n => n.Value);