grdView.DataSource = Select().Skip(pageSize * (start - 1)).Take(rows).ToList();
这个分页性能上并不高
下面是我的分页
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
public static IList<T> PaginationDataSource<T>(IList<T> list, int pageIndex, int pageSize, out int totals)
{
totals = 0;
if (pageIndex < 0)
throw new ArgumentException( "pageIndex必须大于0" );
if (pageSize <= 0)
throw new ArgumentException( "pageSize必须大于0" );
totals = list.Count;
int rowBegin = (pageIndex - 1) * pageSize >= totals ? 0 : (pageIndex - 1) * pageSize;
int rowEnd = rowBegin + pageSize - 1 >= totals ? totals : rowBegin + pageSize - 1;
IList<T> result = new List<T>();
for ( int i = rowBegin; i < rowEnd; i++)
{
result.Add(list[i]);
}
return result;
}
|
经测试
我的方法大概 0.000061
Linq 的 skip take 0.000561
比我的方法 慢10倍