当数据源有2万行数据时，显示速度太慢了?如何提高显示速度? [英] When the datasource have 20 thousand rows of data,the speed to show it is so slow?How to improve the speed to show it?
问题描述
我的代码是gridview.datasource = a(一个是列表，其中
我的想法是，当用户首次进入网页时，我设置了gridview.datasource = a1(a1是a中的前一千行数据)；
然后我设置gridview.datasource = a1(a1是a中的前两千行数据)；
....
然后我设置了gridview.datasource = a19(a1是a中的前19000行数据)；
然后我设置了gridview.datasource = a20(a1是a中的前2万行数据)；
但似乎不起作用，如何解决?
您能给我一个使用gridvie在网页中快速显示大量数据的示例吗?谢谢！
My code is gridview.datasource=a (a is list<studeng> whcih has 20 thousand ),the speed is so slow;
my idea is when user firstly enter the web page , I set gridview.datasource=a1 (a1 is the first 1 thousand rows of data in a);
and than I set gridview.datasource=a1 (a1 is the first 2 thousand rows of data in a);
....
and than I set gridview.datasource=a19 (a1 is the first 19 thousand rows of data in a);
and than I set gridview.datasource=a20 (a1 is the first 20 thousand rows of data in a);
but it seems doesn''t work, how to solve it ?
Can you give me some example to use gridvie to show large amount of data quick in a web page?Thank you!
推荐答案
您可能应该使用内置的分页功能GridView类的名称(请参见此示例 [ ^ ])
网页上有很多数据，请仔细考虑:
假设您只有一列，每个条目为空，并且编码为UTF-8
GridView将生成一个表，每一行都需要< tr>"和</tr>" (9个字节)，并且每个项目都需要< td>"和</td>" (9个字节)，因此:
20000 *(每行9个字节+每行1个项目*每项9个字节)= 360,000字节，仅用于带有一列的标记.但是您的数据可能具有更多列，并且每个条目的值都添加到该数据中.一次要传输的数据很多，而且速度很慢.如果您对它进行分页，则只需一次发送一次，这样会更快.
You should probably use the built in paging features of the GridView class (see this example[^])
That''s a lot of data for a web page, think about it:
Let''s assume you only have one column, each entry empty, and the encoding is UTF-8
The GridView will generate a table, each row needs "<tr>" and "</tr>" (9 bytes), and each item needs "<td>" and "</td>" (9 bytes), so:
20000 * (9 bytes per row + 1 item per row * 9 bytes per item) = 360,000 bytes, just for the markup with one column. But your data probably has more columns, and the values of your entries each add to that data. That''s a lot of data to transfer all at once, and it will be slow. If you page it, you only have to send them a little at a time, and it will be much faster.
WPF中有此代码，但是您应该能够翻译它没有大问题就可以传到Silverlight:
http://bea.stollnitz.com/blog/?p=344 [
There is code for this in WPF, you should however be able to translated it to Silverlight without big issues:
http://bea.stollnitz.com/blog/?p=344[^]
最好的选择是分页仅在结果页面快速加载时才加载最少页面记录，而忽略大量数据.
the best option is paging which loads minimum pages records only as a result pages load fast, it ignore large numbers of data.
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