Accessing ASP.NET controls dynamically from JavaScript

Question

here's what I mean:

I have a few controls, for example,

<asp:DropDownList ID="ddlDate1" runat="server" />
<asp:DropDownList ID="ddlDate2" runat="server" />
<asp:DropDownList ID="ddlDate3" runat="server" />

in my javascript, I want to do something like this:

for (i = 1; i <= count; i++) {
    something[i] = document.getElementById("<%= ddlDateRange" + i + ".ClientID %>");
}

any way I can make this work, or any alternatives?

Vadim · Accepted Answer · 2011-01-22 18:38:38Z

1

Put your dropdown lists into an array. Then you can populate a javascript array like so

var dropDownListIds = [];
<% foreach (DropDownList ddl in myListOfDropDowns) { %>
dropDownListIds.push('<%= ddl.ClientID %>');
<% } %>

answered Jan 22, 2011 at 18:38

Vadim

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Comments

Brian · Accepted Answer · 2011-01-22 18:53:23Z

1

Why not use jQuery and just do something like:

<asp:DropDownList CssClass="ddl" ID="ddlDate1" runat="server" />
<asp:DropDownList CssClass="ddl" ID="ddlDate2" runat="server" />
<asp:DropDownList CssClass="ddl" ID="ddlDate3" runat="server" />

$('.ddl').each(function(){
    var ddl = $(this);
});

answered Jan 22, 2011 at 18:53

Brian

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4 Comments

abatishchev Over a year ago

You can call just $('select')

Brian Over a year ago

@abatishchev, you'd have to assume there aren't any other DropDownLists on the page that he doesn't want included.

abatishchev Over a year ago

Another option: $('#someDiv > select')

Brian Over a year ago

@abatishchev, I like that approach and it's probably how i'd have done it if it were my code. Another would be $("select [id*='ddlDate']")

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