1    int t_rowNum = 10000 ;
 2            int t_column = 1000 ; 
 3            Console.WriteLine("测试创建一个{0}行{1}列的表需要多少时间:",t_rowNum,t_column);
 4            DataTable dt = new DataTable();
 5            DateTime t1 = DateTime.Now ;
 6                DataColumn dc ;
 7            for( int c= 0 ;c< t_column  ; c++ )
 8            {
 9                dc = new DataColumn("c"+c);
10            
11                dt.Columns.Add( dc );
12            
13            }
14            DateTime t2 = DateTime.Now ;
15
16            Console.WriteLine("列已经创建，耗时:"+(t2-t1).Milliseconds+"毫秒");
17
18            DateTime t3=DateTime.Now ;
19            DateTime t4 =DateTime.Now;
20
21            DateTime t5=DateTime.Now ;
22            DataRow dr ;
23            for(int r=0;r<t_rowNum;r++)
24            {
25                if ( r == 0 )
26                    t3 = DateTime.Now;
27                  dr = dt.NewRow();
28                for( int c=0;c<t_column;c++)
29                {
30                    dr[c]="hahshisadadaihdiashd"+c+":"+r ;
31                
32                }
33                dt.Rows.Add(dr);
34                 
35                if ( r== 0 )
36                {
37                    t4 = DateTime.Now ;
38                    Console.WriteLine("正在创建行，预计耗时:"+((t4-t3).Milliseconds*t_rowNum)+"毫秒");
39                }
40            }
41            DateTime t6 =DateTime.Now;
42
43            Console.WriteLine("行已经创建，耗时:"+((t6-t5).TotalSeconds)+"秒");
44
45            Console.ReadLine();

这个还是要耗用900多M内存~