C#实现DataTable按天分组并计数

使用LINQ语句进行查询

var value &＃61; from data in dataSet.Tables[0].AsEnumerable()//where before <&＃61; data.Field("alarmTime") &&// data.Field("alarmTime") <&＃61; nowgroup data by data.Field("alarmTime").ToString("yyyy-MM-dd")into rselect new{count &＃61; r.Count()};


访问数据

foreach (var v in value)
{Console.WriteLine(v.vount);}