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If a value is selected from drop down then a default value should be displayed in other dropdown

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Posted on by Community Power Pla... Microsoft Employee

Screenshot (20).png If in state drop down Uttar Pradesh is selected and it should automatically display its capital as Lucknow in Capital drop down and same for all other states.

i.e default value should be displayed if states are choosen

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Christian Leverenz 1,214 on at

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Hi @Anonymous ,
when i do this kind of things in projects, i need two things:
a list which describes the dependencies (so, what is the capital of a selected state)
a changehandler for the stateselector
As jquery is on portals around, you could do it with jquery.
The code might look something like this (not tested, just written):
let mycapitals = [
{ "state" : 1234, "capital" : 3456 }
,{ "state" : 5678, "capital" : 78910 }
]; // a list of realtion capital to state

let changefunction = (function(src, tgt, rels) {
var jqtgt = $("#" + tgt); // get the jquery field for the capital
var jqsrc=$("#" + src); // get the jquery field for the state
let mychangefun = function() { // create the changefunction
var srcval = jqsrc.val(); // get the statevalue
var tgtvalentry = rels.find(e => e.state == srcval); // find the capitalentry
if(tgtvalentry) { // did we find one?
jqtgt.val(tgtvalentry.capital); // yes, set the value of the capital
}
};
mychangefun(); // initalize in case of read with the right value
jqsrc.change(mychangefun); // attach the changefunction to the stateselctor
return mychangefun; // return back the changefunction of needed to be attached somewhere else
})("stateselectid","capitalselectid",mycapitals);

just replace stateselectid with your attributename of the state and the capitalselectid with the name of the capitalattribute. May be you have to adjust something, when the capital already has a value.

You can place this code in the ~~entity~~basicform or in the template you are using.
Hope this helps,
Christian

PS i think, there is only one capital per state. Why should the user select another one? (well, not my challenge 🙂 )

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