CODEWITHSUNDEEP
javascriptasp.nethidden-field
Kings
Kings

Reputation: 1591

Unable to set hidden field value in javascript

I have defined a hidden filed in aspx:-

<asp:HiddenField runat ="server" ID="hfBrand" value = "False" />

A combo-box control is calling a JavaScript function function:-

<telerik:RadComboBox ID="Brands" runat="server"  
                onclientselectedindexchanged="LoadProperties"
                AutoPostBack="True">
</telerik:RadComboBox>

In that function , I am trying to set that hidden field value to "True":-

function LoadProperties(sender, eventArgs)
{ 
var lblBrand = document.getElementById('<%= hfBrand.ClientID %>').value;
alert(lblBrand);
document.getElementById('<%= hfBrand.ClientID %>').value = "True";
alert(lblBrand)
}

QUESTION:- I can't set the hidden field value to TRUE. WHY it so?? and How to do that?

UPDATE:- Here is the solution which got me right desired output:-

var lblBrand = document.getElementById('<%= hfBrand.ClientID %>').value;
alert(lblBrand);
lblBrand = "True";
alert (lblBrand);

Thnx to everyone who helped me.

Upvotes: 0

Views: 17277

Answers (1)

Steve
Steve

Reputation: 3080

Your second alert is not referring to the hidden values new value. lblBrand value doesnt change after you have updated the hfBrand input value

function LoadProperties(sender, eventArgs)
{ 
var lblBrand = document.getElementById('<%= hfBrand.ClientID %>');
alert(lblBrand.value);
document.getElementById('<%= hfBrand.ClientID %>').value = "True";
alert(lblBrand.value)
}

Try this code!

I reckon it is setting it and you need to get the value of the input again...

(if you wanna see the change, just temporarily change your hidden input to a normal textbox

Upvotes: 5

Related Questions