Question

I am novice to jquery and asp.net. I am using the following coding to retrieve value. Why [0] in $(#textbox1)[0].value is used? is there any alternative way to retrieve value?.

$.ajax({
                     type: "POST",
                     url: "Default.aspx/GetTextData",
                     data: "{}",
                     contentType: "application/json",
                     dataType: "json",
                     success: function(msg) {
                       $("#txtResult")[0].value = msg.d;
                     }
                 });

Many Thanks

Answer 1

In the context of your code, it’s not actually retrieving value, it’s setting:

$("#txtResult")[0].value = msg.d

You can use the alternative, jQuery syntax of (as per my comment):

$('#txtResult').val(msg.d)

It’s required to use [0] as the author of that code would like to assign a value to the standard DOMElement of the input, as [0] is used to get the native DOMElement from that jQuery object. Alternatively you can use:

$('#txtResult').get(0).value = msg.d

Although the previous way is still preferrable