如何創建一個擴展方法將字符串得到一筆 創建Sumstring擴展方法創建擴展方法LINQ
List<myclass> obj=new List<myclass>()
{
new myclass(){ID=1,name="ali",number=1},
new myclass(){ID=1,name="karimi",number=2},
new myclass(){ID=2,name="mohammad",number=4},
new myclass(){ID=2,name="sarbandi",number=5},
};
var query = (from p in obj
group p by p.ID into g
select new
{ id = g.Key, sum = g.Sumstring(p => p.name) }).ToList();
dataGridView1.DataSource=query;
我連接到數據庫 什麼是
字符串的總和是多少?級聯? – zneak 2013-04-11 19:01:14
'sumstring'的輸入/輸出是什麼? – 2013-04-11 19:04:09