C#實現DataTable按天分組並計數

使用LINQ語句進行查詢

var value = from data in dataSet.Tables[0].AsEnumerable()
		//where before <= data.Field<DateTime>("alarmTime") &&
		//      data.Field<DateTime>("alarmTime") <= now
		group data by data.Field<DateTime>("alarmTime").ToString("yyyy-MM-dd")
		into r
		select new
		{
		    count = r.Count()
		};

訪問數據

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