Popluating country and state using jquery and json in javascript
Question
Hi I am trying to populate country and state dropdown list in dropdowns using jquery.
My json looks like this
Blockquote
var myjson = [{"countryName":"Afghanistan","countryCode":"AF"},{"countryName":"United States","countryCode":"US" ,"state":["Alabama","Alaska","Arizona","Arkansas","California","Colorado","Connecticut","Delaware","Florida","Georgia","Hawaii","Idaho","Illinois","Indiana","Iowa","Kansas","Kentucky","Louisiana","Maine","Maryland","Massachusetts","Michigan","Minnesota","Mississippi","Missouri","Montana","Nebraska","Nevada","New Hampshire","New Jersey","New Mexico","New York","North Carolina","North Dakota","Ohio","Oklahoma","Oregon","Pennsylvania","Rhode Island","South Carolina","South Dakota","Tennessee","Texas","Utah","Vermont","Virginia","Washington","West Virginia","Wisconsin","Wyoming"]},
{"countryName":"United States Minor Outlying Islands","countryCode":"UM"},
{"countryName":"Uruguay","countryCode":"UY","state":["abc","edf"]}];
My html
<body>
<select id = "country" name = "country" onchange= "getvalue()"></select>
<select id = "state" name = "state" onchage="getstate()"></select>
</body>
My javascript
<script>
function getvalue(){
var country = document.getElementById("country").value;
var divtemp = document.getElementById("test");
for (var i = 0; i < myjson.length; i++ ) {
if(myjson[i].state != null )
{
if(myjson[i].state.length==0){
$("#state").empty();
}
else
{
for(var j = 0 ; j< myjson[i].state.length;j++)
{
if(country === myjson[i].countryName)
{
//alert(country);
//alert(myjson[i].countryName);
//divtemp.innerHTML= myjson[i].state[j] + "<br>"+divtemp.innerHTML;
$("#state").append(
$("<option></option>")
.text(myjson[i].state[j])
);
}
}
}
}
}
</script>
This script function is populating states but when I select a another country the sates are appending to the earlier states list. I am not able to make out the changes required for my condition. I dont want to use Ajax to do this.
2 answers
solution1
1 2013-09-12 07:19:51
Try this. In the head do this...
<script>
$(document).ready(
//when the document is loaded, initialize my selectors
function initCountries(){
//put all countries into the country selector
for (cix in myjson){
var options='<option value="'+cix+'">'+myjson[cix].countryName+'</option>';
$("#country").append(options);
}
//listen for the change event when the user chooses a country
$("#country").change(function fillStates(){
//find the country the user chose, then fill the states selector
var cix=$(this).val();
var states=myjson[cix].state;
$("#state").empty();
for (six in states){
var options='<option value="'+states[six]+'">'+states[six]+'</option>';
$("#state").append(options);
}
});
//listen for the change event when the user chooses a state
$("#state").change(function stateSelected(){
//show the state the user chose
var six=$(this).val();
alert(six);
});
});
</script>
and in your body change the selectors like this...
<select id = "country"></select>
<select id = "state"></select>
solution2
0 2013-09-12 04:49:13
Clear state combobox on change of country..
document.getElementById('state').innerHTML = "";
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