对datatable进行linq过滤

实例：

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();

}