Can't make javascript object property value update

Question

Not sure why I can't seem to update a value. I'm using a file uploader and I need to append an invoice number to the file name, so we don't get duplicate files.

Here is the code:

console.log(data.files[0]);
            console.log(data.files[0].name);
            console.log('$("#InvoiceNumber").val() =' + $("#InvoiceNumber").val() + "-" + data.files[0]['name']);
            //here I try to update 
            data.files[0]['name'].value = $("#InvoiceNumber").val() + data.files[0]['name'];
            //have also tried
            // data.files[0]['name'] = $("#InvoiceNumber").val() + data.files[0]['name'];
            //and
            //data.files[0].name = $("#InvoiceNumber").val() + data.files[0].name;

            console.log(data.files[0]);

The results from outputting to console are.

I can't change the file name server side, as duplicates exist. Anyone know why I can't update that value. Thanks

You'll have to do that at the server.

Pointy
– Pointy

2019-03-21 23:14:36 +00:00
Commented Mar 21, 2019 at 23:14 — Pointy
– Pointy, Commented Mar 21, 2019 at 23:14

zerkms · Accepted Answer · 2019-03-21 23:13:16Z

5

File#name property is readonly. There is nothing you can do with it.

answered Mar 21, 2019 at 23:13

zerkms

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2 Comments

Web Devvy Over a year ago

Oh ok so that must be why, gee this makes my life much harder :( Thanks for the help

Web Devvy Over a year ago

For those that are interested, I solved my problem. When my form is submitted, I grab the file name which was returned from the file upload funciton. Then I appended my invoice number to the file name and use System.IO.File.Move("oldfilepath+oldfileName", "newfilepath+newfileName"); to rename the file. Then save against the model. Thanks all for your help :)

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