Detect Empty result in JS

Question

I have an ActionResult which return PartialView() or new EmptyResult(), How to detect in JS callback function if returned data is EmptyResullt()? I have tried many ways, i.e. compare with null or with undefined but no results. console.log(data) shows blank space. Any tips and tricks? :)

"more code":

Controller:

    public ActionResult Checkif(int d)
    {
        if (d == 2) return new EmptyResult();
        else return PartialView();
    }

Js function:

function sth ()
{
    $.get('/home/Checkif/', {d: 2}, function(data){
        if(data === null) //<---- this does not work
        {
            //then sth;
        }
    })
}

You need to know the data type of data in order to check whether it is empty or not. Does it come back as an object? an array? a string? Try console.log(data) — jshawl
– jshawl, Commented Aug 8, 2016 at 17:27
So what is EmptyResult() returning, my guess it is not null. — epascarello
– epascarello, Commented Aug 8, 2016 at 17:28

vijayst · Accepted Answer · 2016-08-08 17:24:42Z

2

Usually, checking for if (data) { // do something } will work.

To specifically check for empty string, using data === '' should work.

answered Aug 8, 2016 at 17:24

vijayst

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1 Comment

Blabla Over a year ago

Yeah, if(data) works perfectly! Spent much time to find solution and I did not achieve positive results. Thanks you! :)

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