Disable ASP:dropdownlist based on the selection of another ASP:Dropdownlist.value

Question

I have two asp.net dropdownlists that I want to manipulate clientside with Javascript. These two dropdowns are inside a modal open: function()

When dropdown1.value == "me" I want dropdown2.value to be disabled

How can I accomplish this?

$(document).ready(function () {
                    if (document.getElementById('<%=dropdown1.ClientID%>').value == 'Me')
                        document.getElementById('<%=dropdown2.ClientID%>').disabled = true;
                    });

(optional) Part 2 I need to set an entity framework value to null after dropdown2 has been disabled how could I accomplish this without a postback?

If you're going to use jQuery, use it. Mixing your syntax just makes life difficult. Also, stick to asking 1 question per post. You're more likely to get it answered. — Simon Halsey
– Simon Halsey, Commented Sep 9, 2014 at 22:13

DinoMyte · Accepted Answer · 2014-09-09 22:19:44Z

1

Part 1:

$(document).ready(function () 
{
   if($("#<%=dropdown1.ClientID%>").val() == "Me")
      $("#<%=dropdown2.ClientID%>").prop("disabled",true);
});

Part 2 :

You would need to make an ajax call to a code behind or webservice to do that.

.ASPX

$.ajax({
                type: "POST",
                url: "PageName.aspx/CodeBehindMethodName",
                data: "{}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",

            success: function (result) {


            },
            error: function (error) {

            }
             });

.ASPX.CS

 [WebMethod]
        public static void Test()
        {
          // Call EF code
        }

answered Sep 9, 2014 at 22:19

DinoMyte

8,8781 gold badge21 silver badges27 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Jones James Over a year ago

Thanks for your input I now have somewhere to go from your part 2. Part 1 still is not working unfortunately.

DinoMyte Over a year ago

do you get any error ? Have you checked if the 1st dropdown has a value equals "Me" and not "ME" ?

Collectives™ on Stack Overflow

Disable ASP:dropdownlist based on the selection of another ASP:Dropdownlist.value

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related