Hi

I am a new comer at ASP.net Ajax page. so am faceing some problems.

I have a  ASP.net Ajax page where i use 3 ASP. dropdown List and

3 cascading dropdown extender for those 3 dropdown list.

when i call the page from server it takes long time for first time  rendering  compare to a normal aspx page containing three dropdown list.

How can i optimize the download/rendering speed of a aspx page containing Ajax Controls.

I need this help very bedly...Is there Any one who can help me..

you can view the my page at   http://122.144.14.112/weberp/warehouse/finishgoodIn.aspx

Hi,

You can optimized AJAX performance by enabling compression and caching in AJAX configurations, Please see http://forums.asp.net/p/1428340/3191965.aspx

Thanks

Muhammad Akhar Shiekh

Hi

If you are using 3.5 version of .net framework then you can use <CompositeScript> property of ScriptManager control to combine various scripts so that they are downloaded in one Http request . Actually having extender controls forces lots of js files to be downloaded from server . You can verify this by making use of tools like FireBug , web development helper etc. Set LoadScriptBeforeUI to false in Scriptmanager control decleration , set ScriptMode to false again in ScriptManager control.real performance benifit comes from asp.net ajax webservice , so try using it as much as possible .

Thanks for reply

But I am using ASP.net 2.0....

That's Why i cannot use <CompositeScript> or toolkit Script manager

I have made some change in web.config file like this

<system.web.extensions>
    <scripting>
      <scriptResourceHandler enableCompression="true" enableCaching="true"/>
    </scripting>
  </system.web.extensions>

I also set the LoadScriptBeforeUI='false' and scriptMode='Release' of Script Manager

this three change made the page little faster...But it does not meet my desire

Do you know any more technique for the subject metter

Again thanks for Reply

With Regards

Himadri Das

Software Engineer

Akij Group, Dhaka, Bangladesh

Hi Himadri Das,

Glad to see your page is faster. Please refer to my partner's blog:http://lancezhang.wordpress.com/2008/11/15/aspnet-ajax-performance/

You will find the detailed description about how to improve the Ajax performance.

In addition, the CascadingDropDown's render stage won't cost much time unless there are many CascadingDropDown extenders or the ServiceMethods of them are too complicated.

Please refer to the tutorials of CascadingDropDown, maybe these can improve the service method's efficiency.

http://www.asp.net/learn/Ajax-Control-Toolkit/tutorial-14-cs.aspx
http://www.asp.net/learn/Ajax-Control-Toolkit/tutorial-15-cs.aspx
http://www.asp.net/learn/Ajax-Control-Toolkit/tutorial-16-cs.aspx
http://www.asp.net/learn/Ajax-Control-Toolkit/tutorial-17-cs.aspx

Best regards,

Zhi-Qiang Ni