Modifying asp.net object properties using javascript

Question

I have a asp.dropdown list set enabled=false, is it posible to modify through javascrip to enabled=true? This should happen after a Textbox has a value in it.

Yes, with the disabled property: w3schools.com/jsref/prop_select_disabled.asp — Martin Parenteau
– Martin Parenteau, Commented Apr 13, 2016 at 20:13
This is the ASP tag <asp:DropDownList ID="PrsPlzDdl" runat="server" Enabled="false" AutoPostBack="true" OnSelectedIndexChanged="PrsPlzDdl_SelectedIndexChanged" Width="100%" Height="66%"> and I was trying to modify it by Javascrip with: document.getElementById("PrsPlzDdl").disable = true; Using a keyup event on a differente asp control. Textbox to be exact — Abel C
– Abel C, Commented Apr 15, 2016 at 15:16
I'm a first timer in Stackoverflow I apologize for not formmatting the last comment. ☺' — Abel C
– Abel C, Commented Apr 15, 2016 at 15:26

AlphaG33k · Accepted Answer · 2016-04-13 20:15:58Z

1

Do you mean Enabled="False"? If so, no you cannot - you must do this from the code behind. You are getting the server attributes and client attributes confused. Enabled is not the same as disabled for the client side. You cannot change the server variable Enabled on a runat="server" tag.

answered Apr 13, 2016 at 20:15

AlphaG33k

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3 Comments

Martin Parenteau Over a year ago

Good answer. I thought about the effect on the button, and did not consider the Enabled property itself, as I should have done.

Abel C Over a year ago

Thanks now I understand why my code was not working. I did not know there were two sets of attributes, I thought they were just called different. Any way gotta re-write code, different approach needed.

AlphaG33k Over a year ago

No problem I also found (and still find) Web Forms confusing at times. I welcome the day where I can work exclusively in MVC & MVVM architectures :)

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