Add items to datalist in update panel on load more button click

Question

0.00/5 (No votes)

See more:

Hi.
I have an update panel which contains a datalist control There are some labels inside the Item Template of this datalist.
Following is what I need to do:
Initially datalist will show top 50 rows from the database.
When I click on load more button, there will be a partial postback which will fetch 50 more rows from the database.
Now, one approach that I have used earlier is to fetch (old rows + new 50) and re-assign this new datatable to the datalist.
However, this strategy has a problem. When too many data times are required, fetching all of them again and again creates load on server.
So what I want is that: On load more button click, only new 50 rows should be fetched. Old data should remain intact inside datalist and the new data should be appended to the datalist.

What I have tried:

Donot know how to do this approach.

Posted 6-Oct-16 22:24pm

Member 8057273

Updated 6-Oct-16 23:42pm

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Vincent Maverick Durano · Answer 1 · 2016-10-06T23:42:00

First off, don't use UpdatePanel to do this. You can instead use AJAX to load the next result set on the page. You can apply the concept of "infinite scroll" to load the rest of the data while you scroll or click on the more button.

Take a look at this for example: http://www.aspsnippets.com/Articles/Load-data-while-Scrolling-Page-down-with-jQuery-AJAX-and-ASPNet.aspx[^]

Just do a quick search in google to find more examples in the web.