public DataTable CreateTable()
        {
            //创建Table1
            DataTable dt = new DataTable();
            //对Table1添加列名，并设置列值类型
            DataTable dt1 = new DataTable();//创建Table1
            dt1.Columns.Add("ID", typeof(string));
            dt1.Columns.Add("NAME", typeof(string));
            dt1.Columns.Add("AGE", typeof(int));
            dt1.Columns.Add("SEX", typeof(string));
            //对Table1进行设置KEY
            dt1.PrimaryKey = new DataColumn[] { dt1.Columns["ID"] };
            //对Tabel添加数值
            for (int i = 0; i < 2; i++)
            {
                DataRow dr = dt1.NewRow();
                dr["ID"] = "00" + i.ToString();
                dr["NAME"] = "00-" + i.ToString();
                dr["AGE"] = 15 + i;
                dr["SEX"] = "M";
                dt1.Rows.Add(dr);
            }
            return dt1;
        }