使用总和时出错

Question

我有数据表，这是＆＃39; dtTopAll＆＃39;它有事件和等待列。我想要的是总和等待列和按事件分组。

然而，下面的代码会引发错误，例如等待＆＃39;列不属于表。

ultraGrid1.DataSource = dtTopAll;
var dt1 = (from dr1 in dtTopAll.AsEnumerable()
    group dr1 by dr1.Field<string>("Event") into g
    select new
    {
       Event = g.Key,
       Waits = g.Sum(z => z.Field<int>("Waits"))
    }).ToDataTable();

ugWaitEvent.DataSource = dt1;

Answer 1

Linq查询区分大小写。你能这样试试吗？

ultraGrid1.DataSource = dtTopAll;
var dt1 = (from dr1 in dtTopAll.AsEnumerable()
    group dr1 by dr1.Field<string>("Event") into g
    select new
    {
       EVENT= g.Key,
       WAITS= g.Sum(z => z.Field<int>("WAITS"))
    }).ToDataTable();

ugWaitEvent.DataSource = dt1;