Dynamically populate dropdownlist using asp.net web methods and jQuery

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Hello,

I have 3 different dropdownlists (<select> tag) in my webform, now i don't want to use asp.net postbacks/codebehind to populate them.The first list pre-populated with the names of countries in the world. Now I want to use asp.net web methods (returns json) and jQuery to populate the STATES list based on the country selected (on list.change jQuery event) and so on for the CITY list. Pleas help.

Thanks

Posted 26-Nov-13 4:41am

martene

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Sampath Lokuge 26-Nov-13 14:14pm

Check this link :http://www.codeproject.com/Answers/688258/Appending-data-to-dropdownlist-box-in-JQuery#answer1

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Jain Nishant · Answer 1 · 2013-11-27T22:17:00

You need to select the dropdown and onchange event u'll need to call a webservice and pu tthe result on the next dropdown. That's it.....for example

$('.ddlCountry').bind('change', function () {
var CountryId = $('.ddlCountry').val();
FillStates(CountryId);
}

FillStates = function(CountryId)
{
$.ajax({
url: 'Webservice url', // Webservice gives the states result on the basis of CountryId//
type: 'POST',
cache: false,
dataType: 'json',
data: {CountryId:"'+CountryId+'"},
contentType: 'application/json; charset=utf-8',
success: function (result) {
if (result.d){
$('.ddlStates').val(result.d);
}
}
});

Your problem will be solved. Please feel free to ask for any clarifications.