實例：

DataTable data = new DataTable(); ????????

data.Columns.Add("schoolid", Type.GetType("System.Int32")); ??????????

?data.Columns.Add("ccid", Type.GetType("System.Int32"));

??????????? DataRow newRow1 = data.NewRow(); ?????????

?? newRow1["schoolid"] = 2; ?????????

?? newRow1["ccid"] = 1; ???????????

data.Rows.Add(newRow1);

??????????? DataRow newRow2 = data.NewRow(); ?????????

?? newRow2["schoolid"] = 2; ????????

??? newRow2["ccid"] = 2; ?????????

?? data.Rows.Add(newRow2);

?? DataRow newRow3 = data.NewRow(); ?????

??newRow3["schoolid"] = 1; ??????????

? newRow3["ccid"] = 2; ???????????

data.Rows.Add(newRow3); ??????????

? string ceshi = "1,2"; ???????????

var dataSelect = data.AsEnumerable(); ??????

????? dataSelect = from r in dataSelect ?????????????????

??????? where r.Field<int>("schoolid") == 2 && !(new int?[] {int.Parse(ceshi) }).Contains(r.Field<int>("ccid")) ???????????????????????? select r; ??????????? ??????????? foreach (DataRow row in dataSelect) ???????

???? { ???????????????

　　string schoolid = row["schoolid"].ToString(); ???????????

???? string ccid = row["ccid"].ToString(); ???????

???? }

轉載于:https://www.cnblogs.com/yinchuan/p/5297161.html

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