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I'm trying to set hidden field value in JS which I think works fine with this approach:

  <asp:HiddenField ID="hfLatSW" runat="server" />

   var latSW = bounds.getSouthWest().lat();
   $('#<%=hfLatSW.ClientID %>').value = latSW;

I am trying to access the value on asp button click in code behind gives me null value. What might be happening in the postback and why am I not able to access the value set by JavaScript?

I'm trying to set hidden field value in JS which I think works fine with this approach:

  <asp:HiddenField ID="hfLatSW" runat="server" />

   var latSW = bounds.getSouthWest().lat();
   $('#<%=hfLatSW.ClientID %>').value = latSW;

I am trying to access the value on asp button click in code behind gives me null value. What might be happening in the postback and why am I not able to access the value set by JavaScript?

  • c#
  • javascript
  • jquery
  • html
  • asp
Share Improve this question edited Nov 10, 2021 at 21:18 halfer 20.4k19 gold badges109 silver badges202 bronze badges asked Apr 6, 2014 at 18:51 LazialeLaziale 8,24548 gold badges155 silver badges271 bronze badges
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.value isn't a jQuery property. Use .val():

$('#<%=hfLatSW.ClientID %>').val(latSW);

Or without jQuery:

document.getElementById('<%=hfLatSW.ClientID %>').value = latSW;

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